研究者詳細 - 清水　裕彦

論文 - 清水　裕彦

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Proof-of-principle experiment on a displacement-noise-free neutron interferometer for gravitational wave detection

Iwaguchi S., Fujiie T., Nambu T., Kitaguchi M., Yamagata Y., Mishima K., Nishizawa A., Ishikawa T., Tsuji K., Umemura K., Kobayashi K., Onishi T., Kokeyama K., Shimizu H., Michimura Y., Kawamura S.

Physical Review D 112 巻 ( 10 ) 頁： 1020021 - 10200219 2025年11月

出版者・発行元：Physical Review D

The displacement-noise-free interferometer (DFI) is designed to eliminate all displacement-induced noise while retaining sensitivity to gravitational wave (GW) signals. Ground-based DFIs suffer from physical armlength limitations, resulting in poor sensitivity at frequencies below1 kHz. To address this, previous research introduced a neutron-based DFI, which replaces laser light with neutrons and achieves exceptional sensitivity down to a few hertz. In this study, we conducted a proof-of-principle experiment using a pulsed neutron source at the Japan Proton Accelerator Research Complex. Despite practical constraints that led to deviations from the ideal experimental design, we optimized the setup and developed a novel analysis method that successfully cancels displacement noise while preserving simulatedGWsignals. This work presents the first successful demonstration of a neutron DFI and a neutron interferometer for GW detection.

DOI： 10.1103/yg4l-cj1t

Angular correlations in neutron-γ reactions

Gudkov V., Shimizu H.M.

Physical Review C 112 巻 ( 3 ) 頁： 1 - 19 2025年9月

出版者・発行元：Physical Review C

Angular correlations for low-energy neutron-induced γ reactions are calculated using nuclear reaction formalism for multilevel neutron capture with arbitrary multiplicities of γ transitions.We confirm previous calculations [V. V. Flambaum and O. P. Sushkov, Nucl. Phys. A 435, 352 (1985)] for dipole transitions obtained with different formalism. The possible applications of n-γ correlations for studies of symmetry violations and electromagnetic transitions are discussed.

DOI： 10.1103/3r4y-j1bt

Cryogenic Systems for the TUCAN EDM Experiment Open Access

Martin J.W., Algohi B., Anthony D., Barrón-Palos L., Bradley M., Brossard A., Bui T., Chak J., Davis C., De Vries R., Drury K., Fujimoto D., Fujitani R., Gericke M., Giampa P., Golub R., Hepworth T., Higuchi T., Ichikawa G., Imajo S., Jaison A., Jamieson B., Katotoka M., Kawasaki S., Kitaguchi M., Klassen W., Korkmaz E., Korobkina E., Lavvaf M., Lindner T., Lo N., Longo S., Madison K., Makida Y., Malcolm J., Mammei J., Mammei R., Marshall C., McCrea M., Miller E., Miller M., Mishima K., Mohammadi T., Momose T., Okamura T., Ong H.J., Patni R., Picker R., Ramsay W.D., Rathnakela W., Sato J., Schreyer W., Shima T., Shimizu H., Sidhu S., Stargardter S., Switzer P., Tanihata I., Vanbergen S., Van Oers W.T.H., Watanabe Y., Zahra A., Zhao M.

EPJ Web of Conferences 333 巻 2025年8月

出版者・発行元：EPJ Web of Conferences

The TUCAN (TRIUMF UltraCold Advanced Neutron) Collaboration is completing a new ultracold neutron (UCN) source. The UCN source will deliver UCNs to a neutron electric dipole moment (EDM) experiment. The EDM experiment is projected to be capable of an uncertainty of 1 × 10-27 ecm, competitive with other planned projects, and a factor of ten more precise than the present worlda's best. The TUCAN source is based on a UCN production volume of superfluid helium (He-II), held at 1 K, and coupled to a proton-driven spallation target. The production rate in the source is expected to be in excess of 107 UCN/s; since UCN losses can be small in superfluid helium, this should allow us to build up a large number of UCNs. The spallation-driven superfluid helium technology is the principal aspect making the TUCAN project unique. The superfluid production volume was recently cooled, for the first time, and successfully filled with superfluid helium. The design principles of the UCN source are described, along with some of the challenging cryogenic milestones that were recently passed.

DOI： 10.1051/epjconf/202533303004

Muonic helium hyperfine structure measurements at J-PARC MUSE Open Access

Strasser P., Fukumura S., Goto Y., Asai K., Fushihara M., Ino T., Kanda S., Kawamura S., Kitaguchi M., Nishimura S., Oku T., Okudaira T., Shimizu H.M., Shimomura K., Tada H., Torii H.A.

Proceedings of Science 480 巻 2025年7月

出版者・発行元：Proceedings of Science

Muonic helium is a hydrogenlike atom composed of a helium atom with one of its two electrons replaced by a negative muon. Its ground-state hyperfine structure is a sensitive tool for testing the theory of three-body atomic systems and bound-state quantum electrodynamics and determining fundamental constants of the negative muon magnetic moment and mass. New precise measurements are now in progress at J-PARC Muon Science Facility (MUSE). Zero-field measurements have already been carried out, and the results are more precise than previous measurements 40 years ago. High-field measurements are now in preparation. Furthermore, a new experimental approach to recover the negative muon polarization lost during the muon cascade process in helium is being investigated, which could drastically improve the measurement accuracy. The first laser repolarization experiments have recently been performed. The status of these new muonic helium HFS measurements and the latest results are presented.

DOI： 10.22323/1.480.0017

Development of a Polarized Lanthanum Target with Perovskite Crystals Open Access

Iinuma M., Akao R., Fujita M., Ide I., Ikeda Y., Iwata T., Kawamura S., Kitaguchi M., Kohri H., Kudo S., Miyachi Y., Nambu T., Okudaira T., Okuizumi M., Shimizu H.M., Takada S., Taniguchi T.

Proceedings of Science 472 巻 2025年6月

出版者・発行元：Proceedings of Science

It is widely known that a solid polarized target is a powerful device in research of spin physics, such as investigations of spin structure of nucleons, spin correlation in nuclear reactions, and precise measurements of discrete symmetries. In practical beam experiments, the solid polarized targets are limited to protons and deuterons since a relaxation time of nuclei with a large quadrupole moment is very short under a typical magnitude of external magnetic field. A possible method for overcoming such a problem is to perform the Dynamic Nuclear Polarization(DNP) with perovskite crystals, which is expected as a new way for opening up further possibilities in spin physics. The NOPTREX collaboration applies this method for the development of a polarized lanthanum (<sup>139</sup>La) target, which is a core device for discovery of Time-reversal violating effects with a slow neutron. We will introduce a basic concept and some features of the method, and also show the current status on Research and Development(R&D) of the polarized <sup>139</sup>La target in the NOPTREX project.

DOI： 10.22323/1.472.0002

Circular polarization measurement of γ -rays emitted from32S(n, γ)33S reaction with polarized neutrons Open Access

Endo S., Fujioka H., Ide I., Inuma M., Iwamoto N., Iwamoto O., Kameda K., Kawamura S., Kimura A., Kitaguchi M., Kobayashi R., Nakamura S., Oku T., Okudaira T., Okuizumi M., Rovira G., Shima T., Shimizu H., Takada S., Takahashi S., Yoshikawa H., Yoshioka T.

EPJ Web of Conferences 329 巻 2025年6月

出版者・発行元：EPJ Web of Conferences

We aim to measure circular polarization of γ-rays emitted from neutron capture reactions with a pulsed neutron source for nuclear data and nuclear physics studies. A γ-ray polarimeter was developed to measure the circular polarization. One of performance indicators for polarimeter is an analyzing power known as efficiency in the polarization measurement. The analyzing power is necessary to convert the experimental results to circular polarization. Therefore, the analyzing power was evaluated using the neutron capture reactions of sulfur-32 at the neutron time-of-flight facility, and obtained to be (1.82 ± 0.28)% at 5.4-MeV γ-rays.

DOI： 10.1051/epjconf/202532905003

Study of the Spin-Memory Effect with low-energy gamma-rays in177Hf(n, γ)178Hf reaction measurement Open Access

Kawamura S., Endo S., Iwamoto O., Iwamoto N., Kimura A., Kitaguchi M., Nakamura S., Okudaira T., Rovira G., Shimizu H., Shima T., Yoshikawa H.

EPJ Web of Conferences 329 巻 2025年6月

出版者・発行元：EPJ Web of Conferences

A method on the basis of the Spin-Memory Effect (SME) is available to measure the total angular momentum J of a resonance in a neutron capture reaction. This method uses the fact that the intensity ratio of two gamma-rays emitted from a resonance depends on the J of the resonance. In this study, neutron capture reaction measurements were performed at J-PARC MLF ANNRI using natural Hf (atomic number Z = 72). The total angular momentum of six resonances is deduced. The strength of SME was determined from those analyses. It was found that SME observed in resonances of<sup>177</sup>Hf was stronger than that expected in past studies.

DOI： 10.1051/epjconf/202532905002

Precision measurements of muonium and muonic helium hyperfine structure at J-PARC Open Access

Strasser P., Abe M., Asai K., Fukumura S., Fushihara M., Goto Y., Ino T., Iwai R., Kanda S., Kawamura S., Kitaguchi M., Nishimura S., Oku T., Okudaira T., Powell A., Sasaki K.I., Shimizu H.M., Shimomura K., Tada H., Torii H.A., Yamanaka T., Yamazaki T.

European Physical Journal D 79 巻 ( 3 ) 2025年3月

出版者・発行元：European Physical Journal D

At the J-PARC Muon Science Facility (MUSE), the MuSEUM collaboration is now performing new precision measurements of the ground state hyperfine structure (HFS) of both muonium and muonic helium atoms. High-precision measurements of the muonium ground-state HFS are recognized as one of the most sensitive tools for testing bound-state quantum electrodynamics theory to precisely probe the standard model and determine fundamental constants of the positive muon magnetic moment and mass. The same technique can also be employed to measure muonic helium HFS, obtain the negative muon magnetic moment and mass, and test and improve the theory of the three-body atomic system. Measurements at zero magnetic field have already yielded more accurate results than previous experiments for both muonium and muonic helium atoms. High-field measurements are now ready to start collecting data using the world’s most intense pulsed muon beam at the MUSE H-line. We aim to improve the precision of previous measurements ten times for muonium and a hundred times or more for muonic helium. We review all the key developments for these new measurements, focusing on the high-field experiment, and report the latest results and prospects.

DOI： 10.1140/epjd/s10053-025-00959-2

Transverse asymmetry of individual γ rays in the la 139 (n - , γ) la 140 reaction

Okuizumi M., Auton C.J., Endo S., Fujioka H., Hirota K., Ino T., Ishizaki K., Kimura A., Kitaguchi M., Koga J., Makise S., Niinomi Y., Oku T., Okudaira T., Sakai K., Shima T., Shimizu H.M., Tada H., Takada S., Takahashi S., Tani Y., Yamamoto T., Yoshikawa H., Yoshioka T.

Physical Review C 111 巻 ( 3 ) 2025年3月

出版者・発行元：Physical Review C

The enhancement of the parity-violating asymmetry in the vicinity of p-wave compound nuclear resonances was observed for a variety of medium-heavy nuclei. The enhanced parity-violating asymmetry can be understood using the s-p mixing model. The s-p mixing model predicts several neutron energy-dependent angular correlations between the neutron momentum kn, neutron spin σn, γ-ray momentum kγ, and γ-ray polarization σγ in the (n,γ) reaction. In this paper, the improved value of the transverse asymmetry of γ-ray emissions, corresponding to a correlation term σn·(kn×kγ) in the La139(n - ,γ)La140 reaction, and the transverse asymmetries in the transitions to several low excited states of La140 are reported.

DOI： 10.1103/PhysRevC.111.034611

New muonic He atom HFS measurements at J-PARC MUSE

Goto Y., Fukumura S., Strasser P., Ino T., Iwai R., Kanda S., Kawamura S., Kitaguchi M., Nishimura S., Oku T., Okudaira T., Shimizu H.M., Shimomura K., Tada H., Torii H.A.

Interactions 245 巻 ( 1 ) 2024年12月

出版者・発行元：Interactions

Muonic He (μHe) is a hydrogen-like atom composed of a helium atom with one of its electrons replaced by a negative muon. Measurements of the ground-state hyperfine structure (HFS) interval of the μHe atom is a sensitive tool to test the three-body atomic system, bound-state quantum electrodynamics (QED) theory, and determine fundamental constants of the negative muon magnetic moment and mass. It allows a test of the CPT theorem in muons by comparing these constants with positive muons. Precise measurements of the ground-state HFS interval using a microwave magnetic resonance technique are now in progress at J-PARC by the MuSEUM collaboration. Furthermore, a new experimental approach to recover the muon polarization lost during the muon cascade process is being investigated by repolarizing μHe atoms using a spin-exchange optical pumping (SEOP) technique. The first laser repolarization experiment was recently performed. An overview of the different features of these new μHe atom HFS measurements and the latest results are presented.

DOI： 10.1007/s10751-024-01912-2

Performance of the Fully Equipped Spin Flip Chopper for the Neutron Lifetime Experiment at J-PARC Open Access

Mishima K., Ichikawa G., Fuwa Y., Hasegawa T., Hino M., Hosokawa R., Ino T., Iwashita Y., Kitaguchi M., Matsuzaki S., Mogi T., Okabe H., Oku T., Okudaira T., Seki Y., Shimizu H.E., Shimizu H.M., Takahashi S., Tanida M., Yamashita S., Yokohashi M., Yoshioka T.

Progress of Theoretical and Experimental Physics 2024 巻 ( 9 ) 2024年9月

出版者・発行元：Progress of Theoretical and Experimental Physics

To solve the "neutron lifetime puzzle,"where measured neutron lifetimes differ depending on the measurement methods, an experiment with a pulsed neutron beam at J-PARC is in progress. In this experiment, neutrons are bunched into 40-cm lengths using a spin flip chopper (SFC), where the statistical sensitivity was limited by the aperture size of the SFC. The SFC comprises three sets of magnetic supermirrors and two resonant spin flippers. In this paper, we discuss an upgrade to enlarge the apertures of the SFC. With this upgrade, the statistics per unit time of the neutron lifetime experiment increased by a factor of 2.8, while maintaining a signal-to-noise ratio of 250-400, which is comparable to the previous one. Consequently, the time r equir ed to r each a pr ecision of 1 s in the neutron lifetime ex- periment was reduced from 590 to 170 days, which is a significant reduction in time. This improvement in the statistics will also contribute to the reduction of systematic uncertain- ties, such as background evaluation, fostering further advancements in the neutron lifetime experiments at J-PARC.

DOI： 10.1093/ptep/ptae123

Circular polarization measurement for individual gamma rays in capture reactions with intense pulsed neutrons

Endo S., Abe R., Fujioka H., Ino T., Iwamoto O., Iwamoto N., Kawamura S., Kimura A., Kitaguchi M., Kobayashi R., Nakamura S., Oku T., Okudaira T., Okuizumi M., Omer M., Rovira G., Shima T., Shimizu H.M., Shizuma T., Taira Y., Takada S., Takahashi S., Yoshikawa H., Yoshioka T., Zen H.

European Physical Journal A 60 巻 ( 8 ) 2024年8月

出版者・発行元：European Physical Journal A

Measurements of circular polarization of γ-ray emitted from neutron capture reactions provide valuable information for nuclear physics studies. The spin and parity of excited states can be determined by measuring the circular polarization from polarized neutron capture reactions. Furthermore, the γ-ray circular polarization in a neutron capture resonance is crucial for studying the enhancement effect of parity nonconservation in compound nuclei. The γ-ray circular polarization can be measured using a polarimeter based on magnetic Compton scattering. A polarimeter was constructed, and its performance indicators were evaluated using a circularly polarized γ-ray beam. Finally, as a demonstration, the γ-ray circular polarization was measured in <sup>32</sup>S(n,γ)<sup>33</sup>S reactions with polarized neutrons.

DOI： 10.1140/epja/s10050-024-01392-6

Sagnac-type neutron displacement-noise-free interferometeric gravitational-wave detector

Kawasaki Y., Iwaguchi S., Ishikawa T., Nishizawa A., Kitaguchi M., Yamagata Y., Chen Y., Wu B., Shimizu R., Umemura K., Tsuji K., Shimizu H., Michimura Y., Kobayashi K., Onishi T., Kawamura S.

Classical and Quantum Gravity 41 巻 ( 11 ) 2024年6月

出版者・発行元：Classical and Quantum Gravity

The detection of low-frequency gravitational waves on Earth requires the reduction of displacement noise, which dominates the low-frequency band. One method to cancel test mass displacement noise is a neutron displacement-noise-free interferometer (DFI). This paper proposes a new neutron DFI configuration, a Sagnac-type neutron DFI, which uses a Sagnac interferometer in place of the Mach-Zehnder interferometer. We demonstrate that a sensitivity of the Sagnac-type neutron DFI is higher than that of a conventional neutron DFI with the same interferometer scale. This configuration is particularly significant for neutron DFIs with limited space for construction and limited flux from available neutron sources.

DOI： 10.1088/1361-6382/ad42fa

Combination of crystal growth with optical floating zone and evaluation of Nd3+:LaAlO3 crystals with the dynamic nuclear polarization of 139La and 27Al

Ishizaki K., Ide I., Fujita M., Hotta H., Ito Y., Iinuma M., Ikeda Y., Iwata T., Kitaguchi M., Kohri H., Matsushita T., Miura D., Miyachi Y., Shimizu H.M., Yosoi M.

Review of Scientific Instruments 95 巻 ( 6 ) 2024年6月

出版者・発行元：Review of Scientific Instruments

Producing a polarized lanthanum (La) target with high polarization and long relaxation time is crucial for realizing time-reversal violation experiments using polarized neutron beams. We use a LaAlO<inf>3</inf> crystal doped with a small amount of Nd<sup>3+</sup> ions for the polarized lanthanum target. Optimizing the amount of Nd<sup>3+</sup> ions is considerably important because the achievable polarization and relaxation time strongly depend on this amount. We established a fundamental method to grow single crystals of Nd<sup>3+</sup>:LaAlO<inf>3</inf> using an optical floating zone method that employs halogen lamps and evaluated the crystals with the dynamic nuclear polarization (DNP) method for polarizing nuclear spins. Two crystal samples were grown by ourselves and evaluated with the DNP at 1.3 K and 2.3 T for the first time, except for the target materials of protons. The enhancement of nuclear magnetic resonance signals for <sup>139</sup>La and <sup>27</sup>Al was successfully observed, and the enhancement factors were eventually 3.5 ± 0.3 and 13 ± 3 for the samples with Nd<sup>3+</sup> ions of 0.05 and 0.01 mol. %, respectively. These enhancement factors correspond to absolute vector polarizations of 0.27% ± 0.02% (Nd<sup>3+</sup> 0.05 mol. %) and 1.4% ± 0.3% (Nd<sup>3+</sup> 0.01 mol. %). Although the obtained polarizations are still low, they are acceptable as a first step. The combination scheme of the crystal growth and the evaluation of the crystals is found to be effectively applicable for optimizing the amount of Nd<sup>3+</sup> ions for improving the performance of the polarized target.

DOI： 10.1063/5.0202680

Present Status of Spectroscopy of the Hyperfine Structure and Repolarization of Muonic Helium Atoms at J-PARC Open Access

Fukumura S., Strasser P., Fushihara M., Goto Y., Ino T., Iwai R., Kanda S., Kawamura S., Kitaguchi M., Nishimura S., Oku T., Okudaira T., Shimizu H.M., Shimomura K., Tada H., Torii H.A.

Physics Switzerland 6 巻 ( 2 ) 頁： 877 - 890 2024年6月

出版者・発行元：Physics Switzerland

The mass (Formula presented.) of the negative muon is one of the parameters of the elementary particle Standard Model and it allows us to verify the CPT (charge–parity–time) symmetry theorem by comparing (Formula presented.) value with the mass (Formula presented.) of the positive muon. However, the experimental determination precision of (Formula presented.) is (Formula presented.), which is an order of magnitude lower than the determination precision of (Formula presented.) at (Formula presented.). The authors aim to determine (Formula presented.) and the magnetic moment (Formula presented.) with a precision of (Formula presented.) through spectroscopy of the hyperfine structure (HFS) of muonic helium-4 atom (Formula presented.) under high magnetic fields. (Formula presented.) is an exotic atom where one of the two electrons of the (Formula presented.) atom is replaced by a negative muon. To achieve the goal, it is necessary to determine the HFS of (Formula presented.) with a precision of (Formula presented.). This paper describes the determination procedure of the HFS of (Formula presented.) in weak magnetic fields reported recently, and the work towards achieving the goal of higher precision measurement.

DOI： 10.3390/physics6020054

High sensitivity of a future search for effects of P -odd/ T -odd interactions on the 0.75 eV p -wave resonance in n→ +139 La→ forward transmission determined using a pulsed neutron beam Open Access

Nakabe R., Auton C.J., Endo S., Fujioka H., Gudkov V., Hirota K., Ide I., Ino T., Ishikado M., Kambara W., Kawamura S., Kimura A., Kitaguchi M., Kobayashi R., Okamura T., Oku T., Okudaira T., Okuizumi M., Otero Munoz J.G., Parker J.D., Sakai K., Shima T., Shimizu H.M., Shinohara T., Snow W.M., Takada S., Takahashi R., Takahashi S., Tsuchikawa Y., Yoshioka T.

Physical Review C 109 巻 ( 4 ) 2024年4月

出版者・発行元：Physical Review C

Neutron transmission experiments can offer a new type of highly sensitive search for time-reversal invariance violating (TRIV) effects in nucleon-nucleon interactions via the same enhancement mechanism observed for large parity violating (PV) effects in neutron-induced compound nuclear processes. In these compound processes, the TRIV cross section is given as the product of the PV cross section, a spin factor κ, and a ratio of TRIV and PV matrix elements. We determined κ to be 0.59±0.05 for La139+n using both (n,γ) spectroscopy and (n→ +139La→) transmission. This result quantifies for the first time the high sensitivity of the La139 0.75-eV p-wave resonance in a future search for effects of P-odd/T-odd interactions in (n→ +139La→) forward transmission.

DOI： 10.1103/PhysRevC.109.L041602

Spin dependence in the p -wave resonance of la 139 - + n - +

Okudaira T., Nakabe R., Auton C.J., Endo S., Fujioka H., Gudkov V., Ide I., Ino T., Ishikado M., Kambara W., Kawamura S., Kobayashi R., Kitaguchi M., Okamura T., Oku T., Otero Munoz J.G., Parker J.D., Sakai K., Shima T., Shimizu H.M., Shinohara T., Snow W.M., Takada S., Tsuchikawa Y., Takahashi R., Takahashi S., Yoshikawa H., Yoshioka T.

Physical Review C 109 巻 ( 4 ) 2024年4月

出版者・発行元：Physical Review C

We measured the spin-dependent cross section at a neutron-induced p-wave resonance using a polarized epithermal neutron beam and a polarized nuclear target. Our study focuses on the 0.75 eV p-wave resonance of La139+n, where previous experiments have shown a large enhancement of parity violation. The spin dependence of the neutron absorption cross section of polarized La139 and polarized neutrons determines the partial neutron width of the p-wave resonance. This partial width is a key parameter needed to determine the sensitivity of this system to possible parity-odd and time reversal-odd interactions beyond the standard model. Our findings therefore serve as a foundation for a future search for time reversal violation in this compound nuclear system.

DOI： 10.1103/PhysRevC.109.044606

Predictive factors of post-operative apathy in patients with diffuse frontal gliomas undergoing awake brain mapping Open Access

Motomura K., Kawamura A., Ohka F., Aoki K., Nishikawa T., Yamaguchi J., Kibe Y., Shimizu H., Maeda S., Saito R.

Journal of Neuropsychology 18 巻 ( S1 ) 頁： 73 - 84 2024年3月

出版者・発行元：Journal of Neuropsychology

Patients with diffuse frontal gliomas often present with post-operative apathy after tumour removal. However, the association between apathy and tumour removal of gliomas from the frontal lobe remains unknown. This study aimed to investigate the factors influencing post-operative apathy after tumour removal in patients with diffuse frontal gliomas. We compared the demographics and clinical characteristics of patients with and without post-operative apathy in a cohort of 54 patients who underwent awake brain mapping for frontal gliomas. The frequency of clinical parameters such as left-sided involvement, high-grade tumour types (WHO grades III, IV), main tumour location in the anterior cingulate gyrus (ACC) and/or dorsolateral prefrontal cortex (DLPFC) and orbitofrontal cortex (OFC) was significantly greater in the apathetic group compared to the non-apathetic group. The apathetic group scored significantly lower on neuropsychological assessments such as the Letter Fluency Test among the Word Fluency Tests than the non-pathetic group (p =.000). Moreover, the scores of Parts 3, and 3–1 of the Stroop test were significantly lower in the apathetic group than those in the non-apathetic group (p =.023,.027, respectively). Multivariate model analysis revealed that the appearance of post-operative apathy was significantly related to side of the of lesion [left vs. right, hazard ratio (HR) = 8.00, 95% confidence interval (CI) = 1.36–46.96, p =.021], location of the main tumour in the frontal lobe (ACC/DLPFC/OFC vs. others, HR = 7.99, 95% CI = 2.16–29.59, p =.002), and the Letter Fluency Test (HR =.37, 95% CI =.15–.90, p =.028). Post-operative apathy is significantly associated with ACC and/or DLPFC and OFC in the left hemisphere of diffuse frontal gliomas. Apathy in frontal gliomas is correlated with a decline in the Letter Fluency Test scores. Therefore, this instrument is a potential predictor of post-operative apathy in patients with diffuse frontal gliomas undergoing awake brain mapping.

DOI： 10.1111/jnp.12345

Development of Neutron Interferometer Using Multilayer Mirrors and Measurements of Neutron-Nuclear Scattering Length with Pulsed Neutron Source

Fujiie T., Hino M., Hosobata T., Ichikawa G., Kitaguchi M., Mishima K., Seki Y., Shimizu H.M., Yamagata Y.

Physical Review Letters 132 巻 ( 2 ) 2024年1月

出版者・発行元：Physical Review Letters

This study entailed the successful deployment of a novel neutron interferometer that utilizes multilayer mirrors. The apparatus facilitates a precise evaluation of the wavelength dependence of interference fringes utilizing a pulsed neutron source. Our interferometer achieved an impressive precision of 0.02 rad within a 20-min recording time. Compared to systems using silicon crystals, the measurement sensitivity was maintained even when using a simplified disturbance suppressor. By segregating beam paths entirely, we achieved successful measurements of neutron-nuclear scattering lengths across various samples. The values measured for Si, Al, and Ti were in agreement with those found in the literature, while V showed a disparity of 45%. This discrepancy may be attributable to impurities encountered in previous investigations. The accuracy of measurements can be enhanced further by mitigating systematic uncertainties that are associated with neutron wavelength, sample impurity, and thickness. This novel neutron interferometer enables us to measure fundamental parameters, such as the neutron-nuclear scattering length of materials, with a precision that surpasses that of conventional interferometers.

DOI： 10.1103/PhysRevLett.132.023402

EUSO-SPB1 mission and science

Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Pernas M.A., Bachmann R., Bacholle S., Bagheri M., Bakiri M., Baláz J., Barghini D., Bartocci S., Battisti M., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A.A., Benmessai K., Bertaina M., Bertone P.F., Biermann P.L., Bisconti F., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bolmgren K., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Cambié G., Campana D., Capdevielle J.N., Capel F., Caramete A., Caramete L., Caruso R., Casolino M., Cassardo C., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., Cummings A., de Castro Gónzalez A., de la Taille C., del Peral L., Desiato J., Damian A.D., Diesing R., Dinaucourt P., Djakonow A., Djemil T., Ebersoldt A., Ebisuzaki T., Eser J., Fenu F., Fernández-González S., Ferrarese S., Filippatos G., Finch W., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T., Fukushima M., Galeotti P., García-Ortega E., Gardiol D., Garipov G.K., Gascón E., Gazda E., Genci J., Golzio A., Gorodetzky P., Gregg R., Green A.

Astroparticle Physics 154 巻 2024年1月

出版者・発行元：Astroparticle Physics

The Extreme Universe Space Observatory on a Super Pressure Balloon 1 (EUSO-SPB1) was launched in 2017 April from Wanaka, New Zealand. The plan of this mission of opportunity on a NASA super pressure balloon test flight was to circle the southern hemisphere. The primary scientific goal was to make the first observations of ultra-high-energy cosmic-ray extensive air showers (EASs) by looking down on the atmosphere with an ultraviolet (UV) fluorescence telescope from suborbital altitude (33 km). After 12 days and 4 h aloft, the flight was terminated prematurely in the Pacific Ocean. Before the flight, the instrument was tested extensively in the West Desert of Utah, USA, with UV point sources and lasers. The test results indicated that the instrument had sensitivity to EASs of ⪆3 EeV. Simulations of the telescope system, telescope on time, and realized flight trajectory predicted an observation of about 1 event assuming clear sky conditions. The effects of high clouds were estimated to reduce this value by approximately a factor of 2. A manual search and a machine-learning-based search did not find any EAS signals in these data. Here we review the EUSO-SPB1 instrument and flight and the EAS search.

DOI： 10.1016/j.astropartphys.2023.102891

(n,γ)反応のスピン相関項測定のためのIn-situ SEOPシステムの開発 Open Access

奥泉舞桜, 浅井寛太, 猪野隆, 遠藤駿典, 奥隆之, 奥平琢也, 加倉井和久, 河村しほり, 北口雅暁, 木村敦, 小林龍珠, 清水裕彦, 髙田秀佐, 髙橋慎吾, NOPTREX コラボレーション

日本物理学会講演概要集 79.2 巻 ( 0 ) 頁： 598 - 598 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>原子核の中性子共鳴吸収反応における対称性の破れの増幅はs-p混合モデルによって説明される。s-p混合モデルは(n,γ)反応の運動量・スピン角相関を定式化しており、それらの測定によりモデルの検証が可能である。本発表ではスピンを含む角相関を測定するためにJ-PARC MLF ANNRIに導入予定である3軸方向に中性子を偏極可能なIn-situ SEOPシステムの開発の現状について報告する。</p>

DOI： 10.11316/jpsgaiyo.79.2.0_598

J-PARC/BL05における中性子寿命測定実験：2つの動作ガス圧力条件での中性子寿命解析 Open Access

茂木駿紀, 不破康裕, 広田克也, 細川律也, 市川豪, 猪野隆, 北口雅暁, 三島賢二, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 谷田征輝, 山下了, 吉岡瑞樹

日本物理学会講演概要集 79.1 巻 ( 0 ) 頁： 217 - 217 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子寿命は素粒子・宇宙物理学における重要なパラメータであるが、その測定値にはUCN storage法・proton count法という2つの測定手法間で4.6σの乖離がある。我々は中性子寿命乖離問題の解決を目指して先行実験とは異なる手法による寿命測定実験をJ-PARC MLFのBL05において行なっている。本講演では、2種類のTPC動作ガス圧力での測定データを解析した結果について報告する。</p>

DOI： 10.11316/jpsgaiyo.79.1.0_217

J-PARC/BL05における中性子寿命測定実験：2023年までの解析結果 Open Access

茂木駿紀, 不破康裕, 長谷川拓郎, 広田克也, 星野公邦, 細川律也, 市川豪, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 谷田征輝, 山下了, 吉岡瑞樹

日本物理学会講演概要集 79.2 巻 ( 0 ) 頁： 285 - 285 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子の寿命は素粒子物理学・宇宙物理学における重要なパラメータの一つである。これまで中性子寿命の測定はproton count法とUCN storage法という2つの手法で行われてきており、この2手法の測定値間には9.5秒の乖離が存在している。この寿命乖離問題の解決を目指し、先行実験とは異なる手法での寿命測定実験をJ-PARC MLFのBL05にて行なっている。本講演では2023年までに測定したデータを解析して得られた中性子寿命の値を報告する。</p>

DOI： 10.11316/jpsgaiyo.79.2.0_285

<sup>139</sup>Laを用いた複合核共鳴反応におけるパリティ非保存量の終状態依存性の測定 Open Access

後藤優, 猪野隆, 遠藤駿典, 奥隆之, 奥平琢也, 奥泉舞桜, 河村しほり, 北口雅暁, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 高橋慎吾, 南部太郎, 中部倫太郎, 藤家拓大, 藤岡宏之, 吉岡瑞樹, NOPTREX collaboration

日本物理学会講演概要集 79.1 巻 ( 0 ) 頁： 416 - 416 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>^139^La,^131^Xe,^117^Snなどの原子核が中性子を共鳴吸収し複合核状態を形成する反応において、空間反転対称性の破れが大幅に増幅される現象が観測されている。この増幅効果を用いて時間反転対称性の破れを高感度で探索する実験が計画されており、増幅機構の解明が急務である。複合核モデルの検証を目的として、我々は今年度5月に^139^Laと中性子の反応における空間反転非保存量の終状態依存性の測定を行った。本発表ではその解析結果を発表する。</p>

DOI： 10.11316/jpsgaiyo.79.1.0_416

J-PARC/BL05における中性子寿命測定実験：NaI検出器を用いたγ線背景事象の測定とCO2ガスによる物理測定解析 Open Access

市川豪, 不破康裕, 長谷川拓郎, 広田克也, 星野公邦, 細川律也, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 茂木駿紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 谷田征輝, 山下了, 吉岡瑞樹

日本物理学会講演概要集 79.2 巻 ( 0 ) 頁： 284 - 284 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子寿命は素粒子・宇宙物理学における重要なパラメータであるが、UCN storage法（878.4±0.5 s）とproton count法（888.0±2.0 s）で測定値が4.6σずれているという問題がある。我々はJ-PARC MLF BL05においてTPCを用いた新しい手法の実験を行っている。本講演では、系統誤差の主要項であるγ線背景事象を決定するためのNaI検出器による測定およびCO2ガスを用いた物理測定について発表する。</p>

DOI： 10.11316/jpsgaiyo.79.2.0_284

中性子透過実験を用いた時間反転対称性の破れにおける到達可能な探索感度 Open Access

中部倫太郎, 遠藤駿典, 藤岡宏之, 猪野隆, 河村しほり, 北口雅暁, 奥隆之, 奥平琢也, 奥泉舞桜, 嶋達志, 清水裕彦, 高田秀佐, 高橋慎吾, 吉岡瑞樹, NOPTREX collaboration

日本物理学会講演概要集 79.1 巻 ( 0 ) 頁： 415 - 415 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>低エネルギー中性子と原子核の反応では、複合核共鳴を経由することにより大きな空間反転対称性の破れが観測されている実験事実がある。それと同様の機構が働くならば、時間反転対称性の破れが高感度に探索できる可能性がある。入射中性子エネルギー0.75eVのp波共鳴に対して大きな空間反転対称性の破れが観測されている^139^Laを標的とした、中性子透過実験による時間反転対称性の破れの到達可能な探索感度について報告する。</p>

DOI： 10.11316/jpsgaiyo.79.1.0_415

中性子透過実験による<sup>129</sup>Xe+nのs波共鳴でのスピン依存性の測定 Open Access

萩原直紀, 猪野隆, 及川健一, 及川峻矢, 奥隆之, 奥平琢也, 北口雅暁, 小林龍珠, 酒井健二, 清水裕彦, 高田秀佐, 高橋慎吾, 土川雄介, 原田正英, 藤岡宏之

日本物理学会講演概要集 79.2 巻 ( 0 ) 頁： 593 - 593 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子と原子核の強い相互作用のスピン依存性は中性子と原子核のそれぞれのスピンの内積に比例する断面積をもたらし、これを測定することにより複合核共鳴状態のスピンを直接決定することができる。本研究では^129^Xe+nの9.57eVにおけるs波共鳴に焦点を当て、J-PARC・MLFの偏極熱外中性子ビームと偏極させたXeセルを使用し実験を行った。本講演では^129^Xe+nでのスピン依存性とそれを利用して求めたXeの偏極率決定について議論していく。</p>

DOI： 10.11316/jpsgaiyo.79.2.0_593

ミュオニックヘリウム超微細構造測定精度向上に向けた負ミュオン再偏極の研究 Open Access

後藤優, 福村省三, ストラッサーパトリック, 浅井寛太, 東琉都, 猪野隆, 奥隆之, 奥泉舞桜, 奥平琢也, 河村しほり, 神田聡太郎, 北口雅暁, 清水裕彦, 下村浩一郎, 多田紘規, 鳥居寛之, 西村昇一郎

日本物理学会講演概要集 79.2 巻 ( 0 ) 頁： 1063 - 1063 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>ミュオニックヘリウム(4Heμ-e-)基底状態の超微細構造間隔が精密に測定されれば、3体系QEDの検証や負のミュオン磁気モーメントの高精度決定が可能となる。発表者は精度を向上させるためにスピン交換光ポンピング(SEOP)法を用いてミュオニックヘリウム原子を再偏極させることで、ミュオンカスケード過程で失われた負ミュオン偏極率を回復させる手法を研究している。本講演では5月に行われた新しい負ミュオン再偏極手法(Hybrid-SEOP)による再偏極効率についての実験と、その解析について発表する。</p>

DOI： 10.11316/jpsgaiyo.79.2.0_1063

Vナノ粒子を用いた未知短距離力探索のための中性子小角散乱測定とデータ解析 Open Access

廣本政之, 近藤亮太, 嶋達志, 中部倫太郎, 清水裕彦, 広田克也, 猪野隆, 三島賢二, 北口雅暁, 吉岡瑞樹

日本物理学会講演概要集 79.1 巻 ( 0 ) 頁： 418 - 418 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>到達距離数mm以下の未知短距離力が大きな余剰次元理論等によって示唆されている。ナノメートル領域での未知相互作用を探索するため、探索領域のスケールと同程度のサイズを持つナノ粒子標的を用いた中性子小角散乱実験(SANS)をJ-PARC/MLF/BL05において推進中である。主なバックグラウンド源となる核散乱を低減させるため干渉性核散乱長が最も小さい元素のひとつであるバナジウム元素を用いたV及びV-Ni合金ナノ粒子の開発をRF熱プラズマ法により実施した。作成した平均直径40nmのV及びV-Ni合金ナノ粒子の内、平均的な干渉性核散乱長が最も小さくできたのはＶナノ粒子であり、元素分析の結果から予測される値は+0.724fmとなる。本講演では、作成したVナノ粒子のSANS測定の結果とMCシミュレーションとの比較から未知の短距離力に対する上限値を報告する。</p>

DOI： 10.11316/jpsgaiyo.79.1.0_418

Vナノ粒子を用いたSANS実験による未知短距離力探索のためのデータ解析2 Open Access

廣本政之, 近藤亮太, 嶋達志, 中部倫太郎, 清水裕彦, 広田克也, 猪野隆, 三島賢二, 北口雅暁, 吉岡瑞樹

日本物理学会講演概要集 79.2 巻 ( 0 ) 頁： 600 - 600 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>到達距離数mm以下の未知短距離力が大きな余剰次元理論等によって示唆されている。ナノメートル領域での未知相互作用を探索するため、ナノ粒子標的を用いた中性子小角散乱(SANS)による探索実験をJ-PARC/MLF/BL05において推進中である。　干渉性核散乱長が最も小さい元素のひとつであるVナノ粒子を用いたSANS実験を行った。未知の短距離力に対する運動量移行依存性について、MCシミュレーションの計算で主な系統誤差となるナノ粒子の粒径についてSEM画像とSAXSの異なる分析方法によって求めた。本公演では未知の短距離力の上限値を粒子サイズの系統誤差を評価に含めた結果を報告する。</p>

DOI： 10.11316/jpsgaiyo.79.2.0_600

J-PARC/BL05における中性子寿命測定実験：γ線背景事象による系統誤差の決定 Open Access

市川豪, 不破康裕, 広田克也, 細川律也, 猪野隆, 北口雅暁, 三島賢二, 茂木駿紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 谷田征輝, 山下了, 吉岡瑞樹

日本物理学会講演概要集 79.1 巻 ( 0 ) 頁： 216 - 216 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子寿命は素粒子・宇宙物理学における重要なパラメータであるが、UCN storage法（878.4±0.5 s）とproton count法（888.0±2.0 s）で測定値が4.6σずれているという問題がある。我々はJ-PARC/MLF BL05においてTPCを用いた新しい手法の実験を行っている。本講演では、実験・理論における中性子寿命に関連する物理の現状、主要な不確かさを生み出すγ線背景事象による系統誤差の決定法について発表する。</p>

DOI： 10.11316/jpsgaiyo.79.1.0_216

原子核乾板による重力場中の超冷中性子の量子状態の観測 Open Access

長縄直崇, 有賀智子, 日野正裕, 広田克也, 市川豪, 川崎真介, 北口雅曉, 三島賢二, 武藤直人, 中村光廣, 陳乾, 佐藤修, 清水裕彦

日本物理学会講演概要集 79.2 巻 ( 0 ) 頁： 287 - 287 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>重力場中の超冷中性子の位置分布は、重力、重力と量子力学の関係、重力質量と慣性質量の等価性、未知の短距離力の存在の有無などに関する情報を含んでいる。この位置分布を精密に測定するために100 nm未満の高い分解能を持つ超冷中性子用原子核乾板を開発した。2021年にラウエ・ランジュバン研究所にて高精度で取得した位置分布の最新の解析結果について報告するとともに、弱い等価原理の検証実験の可能性についても論じる予定である。</p>

DOI： 10.11316/jpsgaiyo.79.2.0_287

磁場でのミュオニウム超微細構造精密測定に向けたミュオンビーム分布の評価 Open Access

阿部充志, 奥平琢也, 神田聡太郎, 北口雅暁, 後藤優, 清水裕彦, 下村浩一郎, 鳥居寛之, 西村昇一郎, 福村省三, 山中隆志, MuSEUM collaboration

日本物理学会講演概要集 79.1 巻 ( 0 ) 頁： 206 - 206 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>J-PARCのMuSEUM (Muonium Spectroscopy Experiment Using Microwave)共同研究は、ミュウオニウム原子の基底状態の超微細構造を精密に測定することを目的としている。以前行われたほぼゼロ磁場での測定では、超微細遷移の共鳴を160ppbの相対精度で観測することに成功した。次のステップとして、高強度ミュオンビームライン(H-line)と高磁場(1.7 T)を用いた測定を行い、1 ppbの精度を達成する予定である。本講演では、高磁場におけるミュオニウム超微細構造の精密測定に向けた実験システムの開発内容について発表する。</p>

DOI： 10.11316/jpsgaiyo.79.1.0_206

水素吸蔵Vナノ粒子の中性子小角散乱による未知相互作用探索2 Open Access

近藤亮太, 廣本政之, 嶋達志, 中部倫太郎, 清水裕彦, 北口雅暁, 猪野隆, 三島賢二, 広田克也, 吉岡瑞樹

日本物理学会講演概要集 79.2 巻 ( 0 ) 頁： 599 - 599 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>我々の研究グループでは、中性子の干渉性散乱を利用して、サブミクロンスケールにおける未知相互作用の探索を行っている。この実験ではバックグランドである核力散乱を低減させるために、ナノ粒子に含まれる酸素量を減らしたサンプルを作成し、茨城県東海村にあるJ-PARC(大強度陽子加速器施設)で中性子小角散乱実験を行った。本講演では、この実験結果について述べる。</p>

DOI： 10.11316/jpsgaiyo.79.2.0_599

水素吸蔵Vナノ粒子の中性子小角散乱による未知相互作用探索 Open Access

近藤亮太, 廣本政之, 嶋達志, 中部倫太郎, 清水裕彦, 北口雅暁, 猪野隆, 三島賢二, 広田克也, 吉岡瑞樹

日本物理学会講演概要集 79.1 巻 ( 0 ) 頁： 419 - 419 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>我々の研究グループでは、中性子の干渉性散乱を利用して、サブミクロンスケールにおける未知相互作用の探索を行っている。この実験のバックグラウンドである核力散乱を低減させるために、バナジウムナノ粒子に水素を吸蔵させたサンプルを作成し、茨城県東海村にあるJ-PARC(大強度陽子加速器施設)で中性子小角散乱実験を行った。本講演では、この実験結果について述べる。</p>

DOI： 10.11316/jpsgaiyo.79.1.0_419

時間反転対称性の破れの探索に向けた<sup>131</sup>Xeの偏極率測定手法の開発 Open Access

萩原直紀, 猪野隆, 奥隆之, 奥平琢也, 北口雅暁, 後藤優, 清水裕彦, 高田秀佐, 高橋慎吾, 藤岡宏之

日本物理学会講演概要集 79.1 巻 ( 0 ) 頁： 417 - 417 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>現在CP対称性とT対称性の破れの等価性を用いた物理探索が計画されている。空間反転対称性の破れが増幅されている^131^Xe＋nなどの複合核共鳴状態では、時間反転対称性の破れも同時に起きることが示唆されている。本研究の目的は^131^Ｘeを偏極させ、その偏極測定手法を開発するものである。本研究では^129^Xeを測定し、^129^Xeおよび^131^Xeの自由減衰振動を比較することで^131^Xeの偏極率の絶対値を決定することに成功した。</p>

DOI： 10.11316/jpsgaiyo.79.1.0_417

広帯域多層膜冷中性子干渉計の現状 Open Access

南部太郎, 藤家拓大, 日野正裕, 市川豪, 北口雅暁, 三島賢二, 關義親, 清水裕彦

日本物理学会講演概要集 79.1 巻 ( 0 ) 頁： 420 - 420 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子干渉計は、中性子波動を二経路に分離し重ね合わせることで、二経路間のポテンシャル差を位相差として測定するものであり、これまで基礎物理分野に重要な成果を挙げてきた。我々はパルス中性子源J-PARC,MLFにて中性子多層膜ミラーを使った干渉計実験を行い、既存の干渉計よりも一桁高い測定感度を実現した。使用中性子を20倍に増加させられる広帯域多層膜ミラーを開発した。広帯域ミラー実装の干渉計の開発の現状について発表する。</p>

DOI： 10.11316/jpsgaiyo.79.1.0_420

多層膜冷中性子干渉計を使ったガス試料の核散乱長測定 Open Access

南部太郎, 藤家拓大, 日野正裕, 細畠拓也, 市川豪, 北口雅暁, 三島賢二, 關義親, 清水裕彦, 山形豊

日本物理学会講演概要集 79.2 巻 ( 0 ) 頁： 594 - 594 2024年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子干渉計は、中性子波動を二経路に分離し重ね合わせることで、二経路間のポテンシャル差を位相差として測定するものであり、これまでSiによる干渉計によって数多くの重要な成果を挙げてきた。我々は世界で初めてパルス中性子源J-PARC MLF BL05にて中性子多層膜ミラーによる干渉計実験を行い、数核種の固体試料において測定した核散乱長が過去の文献と一致することを確認した。本年5月末にガス試料を使った核散乱長の測定を予定しており、発表ではその結果の詳細について報告する。</p>

DOI： 10.11316/jpsgaiyo.79.2.0_594

Improved Measurements of Muonic Helium Ground-State Hyperfine Structure at a Near-Zero Magnetic Field Open Access

Strasser P., Fukumura S., Iwai R., Kanda S., Kawamura S., Kitaguchi M., Nishimura S., Seo S., Shimizu H.M., Shimomura K., Tada H., Torii H.A.

Physical Review Letters 131 巻 ( 25 ) 2023年12月

出版者・発行元：Physical Review Letters

Muonic helium atom hyperfine structure (HFS) measurements are a sensitive tool to test the three-body atomic system and bound-state quantum electrodynamics theory, and determine fundamental constants of the negative muon magnetic moment and mass. The world's most intense pulsed negative muon beam at the Muon Science Facility of the Japan Proton Accelerator Research Complex allows improvement of previous measurements and testing further CPT invariance by comparing the magnetic moments and masses of positive and negative muons (second-generation leptons). We report new ground-state HFS measurements of muonic helium-4 atoms at a near-zero magnetic field, performed for the first time using a small admixture of CH4 as an electron donor to form neutral muonic helium atoms efficiently. Our analysis gives Δν=4464.980(20) MHz (4.5 ppm), which is more precise than both previous measurements at weak and high fields. The muonium ground-state HFS was also measured under the same conditions to investigate the isotopic effect on the frequency shift due to the gas density dependence in He with CH4 admixture and compared with previous studies. Muonium and muonic helium can be regarded as light and heavy hydrogen isotopes with an isotopic mass ratio of 36. No isotopic effect was observed within the current experimental precision.

DOI： 10.1103/PhysRevLett.131.253003

Demonstration of simultaneous measurement of the spin rotation of dynamically-diffracted neutrons from multiple crystal planes using pulsed neutrons

Itoh S., Fukumura S., Fujiie T., Kitaguchi M., Shimizu H.M.

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 1057 巻 2023年12月

出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

The strong electric field inside a crystal interacting with dynamically-diffracted neutrons by a single crystal can be used in experiments to search for the electric dipole moment of neutrons. This intra-crystal electric field can be evaluated from the neutron spin rotation derived from the dynamical diffraction. Neutron spin rotations from multiple crystal planes were observed simultaneously using pulsed neutrons with a single SiO<inf>2</inf> crystal. The spin rotation of dynamically-diffracted neutrons from (110)-crystal plane with the symmetric Laue configuration was consistent with the spin rotation calculated from the intra-crystal electric field reported by the previous experiments. In addition, the spin rotation was also studied for the (02̄1)-, (011)- and (111̄)-crystal planes, which are asymmetric Laue configurations. There have been no previous studies of spin rotations or intra-crystal electric fields on these crystal planes. The experimental results suggest that spin rotation can occur even on crystal planes where it was previously thought that the spin rotation could not occur due to zero intra-crystal electric field. This information is important to study the sensitivity and the systematic uncertainties in nEDM search experiments by crystal diffractions.

DOI： 10.1016/j.nima.2023.168734

Diffuse scattering model of ultracold neutrons on wavy surfaces Open Access

Imajo S., Akatsuka H., Hatanaka K., Higuchi T., Ichikawa G., Kawasaki S., Kitaguchi M., Mammei R., Matsumiya R., Mishima K., Picker R., Schreyer W., Shimizu H.M.

Physical Review C 108 巻 ( 3 ) 2023年9月

出版者・発行元：Physical Review C

Metal tubes plated with nickel-phosphorus are used in many fundamental physics experiments that use ultracold neutrons (UCN) because of their ease of fabrication. These tubes are usually polished to an average roughness of 25-150nm. However, there is no scattering model that accurately describes UCN scattering on such a rough guide surface with a mean-square roughness greater than 5nm. We, therefore, developed a scattering model for UCN in which scattering from random surface waviness with a size larger than the UCN wavelength is described by a microfacet Bidirectional Reflectance Distribution Function model (mf-BRDF model), and scattering from smaller structures by the Lambert's cosine law (Lambert model). For the surface waviness, we used the statistical distribution of surface slope measured by an atomic force microscope on a sample piece of guide tube as an input of the model. This model was used to describe UCN transmission experiments conducted at the pulsed UCN source in J-PARC. In these experiments, a UCN beam collimated to a divergence angle smaller than ±6° was directed into a guide tube with a mean-square roughness of 6.4 to 17nm at an oblique angle, and the UCN transport performance and its time-of-flight distribution were measured while changing the angle of incidence. The mf-BRDF model combined with the Lambert model with scattering probability pL=0.039±0.003 reproduced the experimental results well. We have thus established a procedure to evaluate the characteristics of UCN guide tubes with a surface roughness of approximately 10nm.

DOI： 10.1103/PhysRevC.108.034605

Current status of the polarized La target development for T-violation search with slow neutron Open Access

Ide I., Fujita M., Hotta H., Iinuma M., Ikeda Y., Ito Y., Iwata T., Kitaguchi M., Kohri H., Miura D., Miyachi Y., Okudaira T., Shimizu H.M., Takanashi Y., Yosoi M.

Proceedings of Science 433 巻 2023年8月

出版者・発行元：Proceedings of Science

We are addressing the development of a polarized lanthanum (<sup>139</sup>La) target by applying a standard dynamic nuclear polarization (DNP) technique to a single crystal of lanthanum aluminate (LaAlO<inf>3</inf>) doped with neodymium ions (Nd<sup>3+</sup>), which is very attractive to search for violating effects of the time-reversal invariance with neutrons. The use of the LaAlO<inf>3</inf> crystals as target material is very crucial to extend the spin-lattice relaxation time (T<inf>1</inf>) through the optimization of the Nd<sup>3</sup>+ concentration. We have almost established a method for precise control of the Nd<sup>3+</sup> amount and this method has allowed us to grow the crystal with 0.01 mol% concentration differently from the 0.05 mol% reached before. Simple DNP experiments using a single-shot dewar at 1.3 K and 2.3 T allowed the evaluation of the T<inf>1</inf> and the maximum polarization of these crystals. By that we have found that the 0.01 mol% concentration is the best one among the crystals tested in the past. Both, T<inf>1</inf> and the maximum polarization of the 0.01 mol% crystal, have not been exactly obtained because of the long relaxation time, Thus, the preparation of a new DNP system is in progress toward DNP experiments for long-term measurement.

DOI： 10.22323/1.433.0038

Angular distribution of γ rays from a neutron-induced p -wave resonance of Xe 132 Open Access

Okudaira T., Tani Y., Endo S., Doskow J., Fujioka H., Hirota K., Kameda K., Kimura A., Kitaguchi M., Luxnat M., Sakai K., Schaper D.C., Shima T., Shimizu H.M., Snow W.M., Takada S., Yamamoto T., Yoshikawa H., Yoshioka T.

Physical Review C 107 巻 ( 5 ) 2023年5月

出版者・発行元：Physical Review C

A neutron-energy dependent angular distribution was measured for individual γ rays from the 3.2 eV p-wave resonance of Xe131+n, that shows enhanced parity violation owing to a mixing between s- and p-wave amplitudes. The γ-ray transitions from the p-wave resonance were identified, and the angular distribution with respect to the neutron momentum was evaluated as a function of the neutron energy for 7132 keV γ rays, which correspond to a transition to the 1807 keV excited state of Xe132. The angular distribution is considered to originate from the interference between s- and p-wave amplitudes, and will provide a basis for a quantitative understanding of the enhancement mechanism of the fundamental parity violation in compound nuclei.

DOI： 10.1103/PhysRevC.107.054602

Displacement-noise-free interferometeric gravitational-wave detector using unidirectional neutrons with four speeds Open Access

Iwaguchi S., Nishizawa A., Chen Y., Kawasaki Y., Ishikawa T., Kitaguchi M., Yamagata Y., Wu B., Shimizu R., Umemura K., Tsuji K., Shimizu H., Michimura Y., Kawamura S.

Physics Letters Section A General Atomic and Solid State Physics 458 巻 2023年1月

出版者・発行元：Physics Letters Section A General Atomic and Solid State Physics

For further gravitational wave (GW) detections, it is significant to invent a technique to reduce all kinds of mirror displacement noise dominant at low frequencies for ground-based detectors. The neutron displacement-noise-free interferometer (DFI) is one of the tools to reduce all the mirror displacement noise at lower frequencies. In this paper, we describe a further simplified configuration of a neutron DFI in terms of neutron incidence direction. In the new configuration, neutrons enter the interferometer with unidirectional incidence at four speeds as opposed to two bidirectional incidences of opposite directions at two speeds as reported previously. This simplification of the neutron DFI is significant for proof-of-principle experiments.

DOI： 10.1016/j.physleta.2022.128581

Status of the new muonic helium atom HFS measurements at J-PARC MUSE Open Access

Strasser P., Fukumura S., Ino T., Iwai R., Kanda S., Kawamura S., Kitaguchi M., Nishimura S., Oku T., Okudaira T., Seo S., Shimizu H.M., Shimizu K., Shimomura K., Tada H., Tanaka T., Torii H.A., Yamauchi H., Yasuda H.

Journal of Physics Conference Series 2462 巻 ( 1 ) 2023年

出版者・発行元：Journal of Physics Conference Series

Measurements of the muonic helium atom hyperfine structure (HFS) are a sensitive tool to test the theory of three-body atomic systems and bound-state quantum electrodynamics (QED) and to determine fundamental constants of the negative muon magnetic moment and mass. The world's most intense pulsed negative muon beam at J-PARC MUSE brings an opportunity to improve previous measurements and test further CPT invariance by comparing the magnetic moments and masses of positive and negative muons. Test measurements at D-line are now in progress utilizing MuSEUM apparatus at zero field. The first results already have better accuracy than previous measurements in the 1980s. Also, the investigation of a new experimental approach to improve HFS measurements by repolarizing muonic helium atoms using a spin-exchange optical pumping (SEOP) technique was started. If successful, this would drastically improve the measurement accuracy.

DOI： 10.1088/1742-6596/2462/1/012023

<sup>139</sup>La(n,γ)<sup>140</sup>La*反応における中性子スピンとγ線運動量の角相関 Open Access

奥泉舞桜, 奥平琢也, 伊東佑起, 遠藤駿典, 奥隆之, 亀田健斗, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 78.1 巻 ( 0 ) 頁： 2184 - 2184 2023年

Hybrid-SEOPによる偏極ミューオニックヘリウム生成 Open Access

福村省三, 猪野隆, 奥隆之, 奥平琢也, 神田聡太郎, 北口雅暁, 清水裕彦, 下村浩一郎, 鳥居寛之, 西村昇一郎

日本物理学会講演概要集 78.1 巻 ( 0 ) 頁： 434 - 434 2023年

J-PARC/BL05における中性子寿命測定実験：γ線背景事象のグローバルフィット Open Access

市川豪, 不破康裕, 長谷川拓郎, 広田克也, 星野公邦, 細川律也, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 茂木駿紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 谷田征輝, 山下了, 吉岡瑞樹

日本物理学会講演概要集 78.2 巻 ( 0 ) 頁： 268 - 268 2023年

中性子小角散乱による未知相互作用探索のための重水素吸蔵Vナノ粒子開発 Open Access

近藤亮太, 廣本政之, 嶋達志, 中部倫太郎, 清水裕彦, 北口雅暁, 猪野隆, 三島賢二, 広田克也, 吉岡瑞樹

日本物理学会講演概要集 78.1 巻 ( 0 ) 頁： 451 - 451 2023年

J-PARC/BL05における中性子寿命測定実験：高統計データを用いた信号抽出効率における系統誤差評価 Open Access

細川律也, 不破康裕, 長谷川拓郎, 広田克也, 星野公邦, 市川豪, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 茂木駿紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 谷田征輝, 山下了, 吉岡瑞樹

日本物理学会講演概要集 78.2 巻 ( 0 ) 頁： 269 - 269 2023年

J-PARC/BL05における中性子寿命測定実験：検出器シミュレーションにおける実験結果再現性の向上と検出効率における系統誤差の再評価 Open Access

細川律也, 不破康裕, 長谷川拓郎, 広田克也, 市川豪, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 茂木駿紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 谷田征輝, 山下了, 矢野浩大, 吉岡瑞樹

日本物理学会講演概要集 78.1 巻 ( 0 ) 頁： 211 - 211 2023年

J-PARC/BL05における中性子寿命測定実験：中性子寿命解析の結果と現状 Open Access

茂木駿紀, 不破康裕, 長谷川拓郎, 広田克也, 星野公邦, 細川律也, 市川豪, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 谷田征輝, 山下了, 吉岡瑞樹

日本物理学会講演概要集 78.2 巻 ( 0 ) 頁： 270 - 270 2023年

J-PARC/BL05における中性子寿命測定実験：中性子寿命解析の最新結果 Open Access

茂木駿紀, 不破康裕, 長谷川拓郎, 広田克也, 細川律也, 市川豪, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 谷田征輝, 山下了, 吉岡瑞樹

日本物理学会講演概要集 78.1 巻 ( 0 ) 頁： 212 - 212 2023年

J-PARC/BL05における中性子寿命測定実験：γ線背景事象測定と系統誤差見積もりの改善 Open Access

市川豪, 不破康裕, 長谷川拓郎, 広田克也, 細川律也, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 茂木駿紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 谷田征輝, 山下了, 矢野浩大, 吉岡瑞樹

日本物理学会講演概要集 78.1 巻 ( 0 ) 頁： 210 - 210 2023年

時間反転対称性の破れの探索に向けた偏極La核偏極開発の現状 Open Access

伊東佑起, 井出郁央, 南部太郎, 石崎貢平, 堀田大稀, 清水裕彦, 北口雅暁, 奥平琢也, 松下琢, 飯沼昌隆, 郡英輝, 藤田全基, 池田陽一, 谷口貴紀, 高田秀佐, 岩田高広, 宮地義之, 高梨雄矢, 三浦大輔, NOPTREX Collaboration

日本物理学会講演概要集 78.1 巻 ( 0 ) 頁： 435 - 435 2023年

重力波検出のための変位雑音フリー中性子干渉計の開発(8) Open Access

岩口翔輝, 川﨑祐輝, 石川智浩, 西澤篤志, 山形豊, 北口雅暁, 小林和宏, 大西崇文, 清水龍真, 梅村来未, 辻健志, 清水裕彦, 道村唯太, 川村静児

日本物理学会講演概要集 78.1 巻 ( 0 ) 頁： 659 - 659 2023年

複合核を用いた時間反転対称性の破れの探索とそれに向けた複合核反応の基礎研究 Open Access

奥平琢也, 伊東佑起, 井出郁央, 遠藤駿典, 奥隆之, 奥泉舞桜, 後藤優, 亀田健斗, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 南部太郎, 西村岳太郎, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 78.1 巻 ( 0 ) 頁： 438 - 438 2023年

Measurement of the transverse asymmetry of γ rays in the Sn 117 (n,γ) Sn 118 reaction Open Access

Endo S., Okudaira T., Abe R., Fujioka H., Hirota K., Kimura A., Kitaguchi M., Oku T., Sakai K., Shima T., Shimizu H.M., Takada S., Takahashi S., Yamamoto T., Yoshikawa H., Yoshioka T.

Physical Review C 106 巻 ( 6 ) 2022年12月

出版者・発行元：Physical Review C

Largely enhanced parity-violating effects observed in compound resonances induced by epithermal neutrons are currently attributed to the mixing of parity-unfavored partial amplitudes in the entrance channel of the compound states. Furthermore, it is proposed that the same mechanism that enhances the parity violation also enhances the breaking of time-reversal invariance in the compound nucleus. The entrance-channel mixing induces energy-dependent spin-angular correlations of individual γ rays emitted from the compound nuclear state. For a detailed study of the mixing model, the γ-ray yield in the reaction of Sn117(n,γ)Sn118 was measured using a pulsed beam of polarized epithermal neutrons and Ge detectors. An angular dependence of asymmetric γ-ray yields for the orientation of the neutron polarization was observed.

DOI： 10.1103/PhysRevC.106.064601

Displacement-noise-free neutron interferometer for gravitational wave detection using a single Mach-Zehnder configuration Open Access

Iwaguchi S., Nishizawa A., Chen Y., Kawasaki Y., Kitaguchi M., Morimoto T., Ishikawa T., Wu B., Watanabe I., Shimizu R., Shimizu H., Michimura Y., Kawamura S.

Physics Letters Section A General Atomic and Solid State Physics 441 巻 2022年7月

出版者・発行元：Physics Letters Section A General Atomic and Solid State Physics

The improvement of sensitivity to gravitational waves (GWs) at lower frequencies is still challenging on account of displacement noise. One of the solutions is the neutron displacement-noise-free interferometer (DFI). We focus on a simplification of the detector configuration by taking advantage of the ability to adjust the neutron speed depending on the configuration. The new configuration consists of two beamsplitters and two mirrors, which constitute a single Mach-Zehnder interferometer (MZI). It is simpler than the configuration with two MZIs in previous research. All displacement noise of mirrors and beamsplitters can be canceled in the frequency domain. This cancellation can be explained intuitively using a phasor diagram.

DOI： 10.1016/j.physleta.2022.128150

A novel nuclear emulsion detector for measurement of quantum states of ultracold neutrons in the Earth's gravitational field Open Access

Muto N., Abele H., Ariga T., Bosina J., Hino M., Hirota K., Ichikawa G., Jenke T., Kawahara H., Kawasaki S., Kitaguchi M., Micko J., Mishima K., Naganawa N., Nakamura M., Roccia S., Sato O., Sedmik R.I.P., Seki Y., Shimizu H.M., Tada S., Umemoto A.

Journal of Instrumentation 17 巻 ( 7 ) 2022年7月

出版者・発行元：Journal of Instrumentation

Hypothetical short-range interactions could be detected by measuring the wavefunctions of gravitationally bound ultracold neutrons (UCNs) on a mirror in the Earth's gravitational field. Searches for them with higher sensitivity require detectors with higher spatial resolution. We developed and have been improving an UCN detector with a high spatial resolution, which consists of a Si substrate, a thin converter layer including 10B4C, and a layer of fine-grained nuclear emulsion. Its resolution was estimated to be less than 100 nm by fitting tracks of either 7Li nuclei or α-particles, which were created when neutrons interacted with the 10B4C layer. For actual measurements of the spatial distributions, the following two improvements were made. The first improvement was to establish a method to align microscopic images with high accuracy within a wide region of 65 mm × 0.2 mm. We created reference marks of 1 μm and 5 μm diameter with an interval of 50 μm and 500 μm, respectively, on the Si substrate by electron beam lithography and realized a position accuracy of less than 30 nm. The second improvement was to build a holder for the detector that could maintain the atmospheric pressure around the nuclear emulsion to utilize it under a vacuum during exposure to UCNs. The intrinsic resolution of the improved detector was estimated to be better than 0.56(8) μm by evaluating the blur of a transmission image of a gadolinium grating taken by cold neutrons. The evaluation included the precision of the gadolinium grating. A test exposure was conducted to obtain the spatial distribution of UCNs in the quantized states on a mirror in the Earth's gravitational field. The distribution was obtained, fitted with the theoretical curve, and turned out to be reasonable for UCNs in quantized states when we considered a blurring of 6.9 μm. The blurring was well explained as a result of neutron refraction due to the large surface roughness on the upstream side of the Si substrate. By using a double-side-polished Si substrate, a resolution of less than 0.56 μm is expected to be achieved for UCNs.

DOI： 10.1088/1748-0221/17/07/P07014

Neutron displacement noise-free interferometer for gravitational-wave detection Open Access

Nishizawa A., Iwaguchi S., Chen Y., Morimoto T., Ishikawa T., Wu B., Watanabe I., Kawasaki Y., Shimizu R., Shimizu H., Kitaguchi M., Michimura Y., Kawamura S.

Physical Review D 105 巻 ( 12 ) 2022年6月

出版者・発行元：Physical Review D

An interferometer design that cancels all displacement noises of its test masses and maintains a gravitational-wave (GW) signal by combining multiple detector signals is called a displacement noise-free interferometer (DFI). The idea has been considered previously for a laser interferometer. However, a limitation of a laser DFI is that its sensitive frequency band is too high for astrophysical GW sources, ∼105 Hz even for a kilometer-sized interferometer. To circumvent this limitation, in this paper, we propose a neutron DFI, in which neutrons are used instead of light. Since neutrons have velocities much lower than the speed of light, the sensitive frequency band of a neutron DFI can be lowered down to ∼10-1 Hz. Therefore, a neutron DFI can be utilized for detecting GWs that are inaccessible by an ordinary laser interferometer on the ground.

DOI： 10.1103/PhysRevD.105.124017

Improvement of systematic uncertainties for the neutron lifetime experiment at J-PARC Open Access

Mogi T., Hasegawa T., Hirota K., Ichikawa G., Ieki S., Ino T., Iwashita Y., Kajiwara S., Kato Y., Kitaguchi M., Kitahara R., Koga J., Makise S., Matsuzaki S., Mishima K., Morikawa K., Nagakura N., Okabe H., Otono H., Seki Y., Sekiba D., Shima T., Shimizu H.E., Shimizu H.M., Sugisawa Y., Sumi N., Sumino H., Tanabe T., Tomita T., Uehara H., Yamada T., Yamashita S., Yano K., Yoshioka T.

Proceedings of Science 380 巻 2022年5月

出版者・発行元：Proceedings of Science

The neutron lifetime is one of the important parameters for particle physics and astrophysics. There is a 4.6σ (9.5 s) discrepancy between the results of the two typical methods. To solve this discrepancy, a new neutron lifetime experiment with a different method is in progress at J-PARC, and this experiment published the first result in 2020 of 898 ± 10(stat.) + 15/−18(syst.) s. We have performed improvements to reduce systematic uncertainties towards 1 s accuracy. The methods to measure the amount of <sup>3</sup>He injected and in the working gas have been upgraded, and a new model for the space charge effect in the Monte Carlo simulation has been implemented.

DOI： 10.22323/1.380.0458

Neutron lifetime experiment with pulsed cold neutrons at J-PARC Open Access

Ichikawa G., Fuwa Y., Hasegawa T., Hino M., Hirota K., Ino T., Iwashita Y., Kitaguchi M., Koga J., Matsuzaki S., Mishima K., Mogi T., Morikawa K., Okabe H., Otono H., Seki Y., Sekiba D., Shima T., Shimizu H., Shimizu H., Sumi N., Sumino H., Yamashita S., Yano K., Yoshioka T.

Proceedings of Science 380 巻 2022年5月

出版者・発行元：Proceedings of Science

A free neutron decays in a lifetime of about 880 s. Although the neutron lifetime is an important parameter in modern physics, there is a 4.6σ (9.5 s) discrepancy between the experimental results of two typical methods: the beam method and the storage method. We are carrying out a new experimental method to measure the neutron lifetime using a pulsed neutron beam at J-PARC MLF BL05 to determine the cause of the discrepancy, whether overlooked systematic uncertainties or new physics. A review of our experiment including the first physics result with acquired data during 2014 - 2016 and the status using new neutron optics are presented here.

DOI： 10.22323/1.380.0457

Angular distribution of γ rays from the p -wave resonance of Sn 118 Open Access

Koga J., Takada S., Endo S., Fujioka H., Hirota K., Ishizaki K., Kimura A., Kitaguchi M., Niinomi Y., Okudaira T., Sakai K., Shima T., Shimizu H.M., Tani Y., Yamamoto T., Yoshikawa H., Yoshioka T.

Physical Review C 105 巻 ( 5 ) 2022年5月

出版者・発行元：Physical Review C

The neutron energy-dependent angular distribution of γ rays from the Sn117(n,γ) reaction was measured with germanium detectors and a pulsed neutron beam. The angular distribution was clearly observed in γ-ray emissions with an energy of 9327 keV which corresponds to the transition from a neutron resonance of Sn117+n to the ground state of Sn118. The angular distribution causes an angular-dependent asymmetric resonance shape. An asymmetry ALH was defined as (NL-NH)/(NL+NH), where NL and NH are integrated values for lower- and higher-energy regions of a neutron resonance, respectively. We found that the ALH has the angular dependence of (Acosθγ+B), where θγ is the γ-ray emission angle with respect to the incident neutron momentum, with A=0.394±0.073 and B=0.118±0.029 in the 1.33 eV p-wave resonance.

DOI： 10.1103/PhysRevC.105.054615

A study on UV emission from clouds with Mini-EUSO Open Access

Golzio A., Battisti M., Bertaina M., Bolmgren K., Cambiè G., Casolino M., Cassardo C., Cremonini R., Ferrarese S., Fuglesang C., Manfrin M., Marcelli L., Piotrowski L., Shinozaki K., Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Barghini D., Bartocci S., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A.A., Benmessai K., Bertone P.F., Biermann P.L., Bisconti F., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Campana D., Capdevielle J.N., Capel F., Caramete A., Caramete L., Carlson P., Caruso R., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Dinaucourt P., Djakonow A., Djemil T., Ebersoldt A., Ebisuzaki T., Eliasson L., Eser J., Fenu F., Fernández-González S., Filippatos G., Finch W.I., Fornaro C., Fouka M., Franceschi A., Franchini S., Fujii T., Fukushima M., Galeotti P., García-Ortega E., Gardiol D., Garipov G.K., Gascón E., Gazda E., Genci J.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

Mini-EUSO is the first mission of the JEM-EUSO program located on the International Space Station. One of the main goals of the mission is to provide valuable scientific data in view of future large missions devoted to study Ultra-High Energy Cosmic Rays (UHECRs) from space by exploiting the fluorescence emission generated by Extensive Air Showers (EAS) developing in the atmosphere. A space mission like Mini-EUSO experiences continuous changes in atmospheric conditions, including the cloud presence. The influence of clouds on space-based observation is, therefore, an important topic to investigate as it might alter the instantaneous exposure for EAS detection or deteriorate the quality of the EAS images with consequences on the reconstructed EAS parameters. For this purpose, JEM-EUSO is planning to have an IR camera and a lidar as part of its Atmospheric Monitoring System. At the same time, it would be extremely beneficial if the UV camera itself would be able to detect the presence of clouds, at least in some specific conditions. For this reason, we analyze a few case studies by comparing the pixel count rates from Mini-EUSO during orbits with the cloud cover (as cloud fraction). This quantity is retrieved from the Global Forecast System (GFS) model at different height levels over the Mini-EUSO trajectory. The results of this analysis are reported.

DOI： 10.22323/1.395.0208

Simulation studies for the Mini-EUSO detector Open Access

Miyamoto H., Fenu F., Barghini D., Battisti M., Belov A., Bertaina M., Bisconti F., Bonino R., Cambie G., Capel F., Casolino M., Churilo I., Ebisuzaki T., Fuglesang C., Golzio A., Gorodetzky P., Kajino F., Klimov P., Manfrin M., Marcelli L., Marszał W., Mignone M., Parizot E., Picozza P., Piotrowski L.W., Plebaniak Z., Prévôt G., Reali E., Ricci M., Sakaki N., Shinozaki K., Suino G., Szabelski J., Takizawa Y., Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Bartocci S., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Benmessai K., Bertone P.F., Biermann P.L., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bolmgren K., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Campana D., Capdevielle J.N., Caramete A., Caramete L., Carlson P., Caruso R., Cassardo C., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Dinaucourt P., Djakonow A., Djemil T., Ebersoldt A.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

Mini-EUSO is a mission of the JEM-EUSO program flying onboard the International Space Station since August 2019. Since the first data acquisition in October 2019, more than 35 sessions have been performed for a total of 52 hours of observations. The detector has been observing Earth at night-time in the UV range and detected a wide variety of transient sources all of which have been modeled through Monte Carlo simulations. Mini-EUSO is also capable of detecting meteors and potentially space debris and we performed simulations for such events to estimate their impact on future missions for cosmic ray science from space. We show here examples of the simulation work done in this framework to analyze the Mini-EUSO data. The expected response of Mini-EUSO with respect to ultra high energy cosmic ray showers has been studied. The efficiency curve of Mini-EUSO as a function of primary energy has been estimated and the energy threshold for Cosmic Rays has been placed to be above 10<sup>21</sup> eV. We compared the morphology of several transient events detected during the mission with cosmic ray simulations and excluded that they can be due to cosmic ray showers. To validate the energy threshold of the detector, a system of ground based flashers is being used for end-to-end calibration purposes. We therefore implemented a parameterization of such flashers into the JEM-EUSO simulation framework and studied the response of the detector with respect to such sources.

DOI： 10.22323/1.395.0334

Science and mission status of EUSO-SPB2 Open Access

Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Barghini D., Bartocci S., Battisti M., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A.A., Benmessai K., Bertaina M., Bertone P.F., Biermann P.L., Bisconti F., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Cambié G., Campana D., Capdevielle J.N., Capel F., Caramete A., Caramete L., Carlson P., Caruso R., Casolino M., Cassardo C., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Dinaucourt P., Djakonow A., Djemil T., Ebersoldt A., Ebisuzaki T., Eliasson L., Eser J., Fenu F., Fernández-González S., Ferrarese S., Filippatos G., Finch W.I., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T., Fukushima M., Galeotti P., García-Ortega E., Gardiol D., Garipov G.K., Gascón E., Gazda E., Genci J., Golzio A., González Alvarado C., Gorodetzky P., Green A., Guarino F., Guépin C., Guzmán A.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

The Extreme Universe Space Observatory on a Super Pressure Balloon II (EUSO-SPB2) is a second generation stratospheric balloon instrument for the detection of Ultra High Energy Cosmic Rays (UHECRs, E > 1 EeV) via the fluorescence technique and of Very High Energy (VHE, E > 10 PeV) neutrinos via Cherenkov emission. EUSO-SPB2 is a pathfinder mission for instruments like the proposed Probe Of Extreme Multi-Messenger Astrophysics (POEMMA). The purpose of such a space-based observatory is to measure UHECRs and UHE neutrinos with high statistics and uniform exposure. EUSO-SPB2 is designed with two Schmidt telescopes, each optimized for their respective observational goals. The Fluorescence Telescope looks at the nadir to measure the fluorescence emission from UHECR-induced extensive air shower (EAS), while the Cherenkov Telescope is optimized for fast signals (∼10 ns) and points near the Earth's limb. This allows for the measurement of Cherenkov light from EAS caused by Earth skimming VHE neutrinos if pointed slightly below the limb or from UHECRs if observing slightly above. The expected launch date of EUSO-SPB2 is Spring 2023 from Wanaka, NZ with target duration of up to 100 days. Such a flight would provide thousands of VHECR Cherenkov signals in addition to tens of UHECR fluorescence tracks. Neither of these kinds of events have been observed from either orbital or suborbital altitudes before, making EUSO-SPB2 crucial to move forward towards a space-based instrument. It will also enhance the understanding of potential background signals for both detection techniques. This contribution will provide a short overview of the detector and the current status of the mission as well as its scientific goals.

DOI： 10.22323/1.395.0404

An overview of the JEM-EUSO program and results Open Access

Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Barghini D., Bartocci S., Battisti M., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A.A., Benmessai K., Bertaina M., Bertone P.F., Biermann P.L., Bisconti F., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bolmgren K., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Cambié G., Campana D., Capdevielle J.N., Capel F., Caramete A., Caramete L., Carlson P., Caruso R., Casolino M., Cassardo C., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Dinaucourt P., Djakonow A., Djemil T., Ebersoldt A., Ebisuzaki T., Eser J., Fenu F., Fernández-González S., Ferrarese S., Filippatos G., Finch W.I., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T., Fukushima M., Galeotti P., García-Ortega E., Gardiol D., Garipov G.K., Gascón E., Gazda E., Genci J., Golzio A., González Alvarado C., Gorodetzky P., Green A., Guarino F., Guépin C., Guzmán A.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

The field of UHECRs (Ultra-High energy cosmic Rays) and the understanding of particle acceleration in the cosmos, as a key ingredient to the behaviour of the most powerful sources in the universe, is of outmost importance for astroparticle physics as well as for fundamental physics and will improve our general understanding of the universe. The current main goals are to identify sources of UHECRs and their composition. For this, increased statistics is required. A space-based detector for UHECR research has the advantage of a very large exposure and a uniform coverage of the celestial sphere. The aim of the JEM-EUSO program [1] is to bring the study of UHECRs to space. The principle of observation is based on the detection of UV light emitted by isotropic fluorescence of atmospheric nitrogen excited by the Extensive Air Showers (EAS) in the Earth's atmosphere and forward-beamed Cherenkov radiation reflected from the Earth's surface or dense cloud tops. In addition to the prime objective of UHECR studies, JEM-EUSO will do several secondary studies due to the instruments' unique capacity of detecting very weak UV-signals with extreme time-resolution around 1 μs: meteors, Transient Luminous Events (TLE), bioluminescence, maps of human generated UV-light, searches for Strange Quark Matter (SQM) and high-energy neutrinos, and more. The JEM-EUSO program includes several missions from ground (EUSO-TA [2]), from stratospheric balloons (EUSO-Balloon [3], EUSO-SPB1 [4], EUSO-SPB2 [5]), and from space (TUS [6], Mini-EUSO [7]) employing fluorescence detectors to demonstrate the UHECR observation from space and prepare the large size missions K-EUSO [8] and POEMMA [9]. A review of the current status of the program, the key results obtained so far by the different projects, and the perspectives for the near future are presented.

DOI： 10.22323/1.395.0406

Study of the calibration method using the stars measured by the EUSO-TA telescope Open Access

Plebaniak Z., Przybylak M., Barghini D., Bertaina M., Bisconti F., Casolino M., Gardiol D., Lipiec R., Piotrowski L.W., Shinozaki K., Szabelski J., Abdellaoui G., Abe S., Adams J.H., Ahriche A., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bacholle S., Baláz J., Bakiri M., Yashin I.V., Bartocci S., Battisti M., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A., Benmessai K., Yonetoku D., Bertone P., Biermann P.L., Yoshida S., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Cambie G., Campana D., Capdevielle J.N., Capel F., Caramete A., Caramete L., Carlson P., Caruso R., Yano H., Cassardo C., Castellina A., Catalano O., Cellino A., Cerny K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Djakonow A., Djemil T., Ebersoldt A., Ebisuzaki T., Engel R., Eliasson L., Eser J., Fenu F., Fernández-González S., Ferrarese S., Fillapatos G., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T., Fukushima M., Galeotti P., García-Ortega E.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

EUSO-TA is a ground-based experiment, placed at Black Rock Mesa of the Telescope Array site as a part of the JEM-EUSO (Joint Experiment Missions for the Extreme Universe Space Observatory) program. The UV fluorescence imaging telescope with a field of view of about 10.6<sup>◦</sup> x 10.6<sup>◦</sup> consisting of 2304 pixels (36 Multi-Anode Photomultipliers, 64 pixels each) works with 2.5-microsecond time resolution. An experimental setup with two Fresnel lenses allows for measurements of Ultra High Energy Cosmic Rays in parallel with the TA experiment as well as the other sources like flashes of lightning, artificial signals from UV calibration lasers, meteors and stars. Stars increase counts on pixels while crossing the field of view as the point-like sources. In this work, we discuss the method for calibration of EUSO fluorescence detectors based on signals from stars registered by the EUSO-TA experiment during several campaigns. As the star position is known, the analysis of signals gives an opportunity to determine the pointing accuracy of the detector. This can be applied to space-borne or balloon-borne EUSO missions. We describe in details the method of the analysis which provides information about detector parameters like the shape of the point spread function and is the way to perform absolute calibration of EUSO cameras.

DOI： 10.22323/1.395.0240

Expected performance of the K-EUSO space-based observatory Open Access

Bianciotto M., Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Barghini D., Bartocci S., Battisti M., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A.A., Benmessai K., Bertaina M., Bertone P.F., Biermann P.L., Bisconti F., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bolmgren K., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Cambié G., Campana D., Capdevielle J.N., Capel F., Caramete A., Caramete L., Carlson P., Caruso R., Casolino M., Cassardo C., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Dinaucourt P., Djakonow A., Djemil T., Ebersoldt A., Ebisuzaki T., Eser J., Fenu F., Fernández-González S., Ferrarese S., Filippatos G., Finch W.I., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T., Fukushima M., Galeotti P., García-Ortega E., Gardiol D., Garipov G.K., Gascón E., Gazda E., Genci J., Golzio A., González Alvarado C., Gorodetzky P., Green A., Guarino F., Guépin C.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

K-EUSO is a planned mission of the JEM-EUSO program for the study of ultra-high energy cosmic rays (UHECR) from space, to be deployed on the International Space Station. The K-EUSO observatory consists of a UV telescope with a wide field of view, which aims at the detection of fluorescence light emitted by extensive air showers (EAS) in the atmosphere. The EAS events will be sampled with a time resolution of 1-2.5 μs to reconstruct the entire shower profile with high precision. The detector consisting of ∼ 10<sup>5</sup> independent pixels will allow a spatial resolution of ∼700 m on ground. From a 400 km altitude, K-EUSO will achieve a large and full sky exposure to sample the highest energy range of the UHECR spectrum. In this contribution, we present estimates of the performance of the observatory: an estimation of the expected exposure and triggered event rate as a function of energy and the event reconstruction performance, including resolution of arrival directions and energy of UHECRs.

DOI： 10.22323/1.395.0409

Expected Performance of the EUSO-SPB2 Fluorescence Telescope Open Access

Heaton C., Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Barghini D., Bartocci S., Battisti M., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A.A., Benmessai K., Bertaina M., Bertone P.F., Biermann P.L., Bisconti F., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bolmgren K., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Cambié G., Campana D., Capdevielle J.N., Capel F., Caramete A., Caramete L., Carlson P., Caruso R., Casolino M., Cassardo C., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Dinaucourt P., Djakonow A., Djemil T., Ebersoldt A., Ebisuzaki T., Eser J., Fenu F., Fernández-González S., Ferrarese S., Filippatos G., Finch W.I., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T., Fukushima M., Galeotti P., García-Ortega E., Gardiol D., Garipov G.K., Gascón E., Gazda E., Genci J., Golzio A., González Alvarado C., Gorodetzky P., Green A., Guarino F., Guépin C.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

The Extreme Universe Space Observatory Super Pressure Balloon 2 (EUSO-SPB2) is under development, and will prototype instrumentation for future satellite-based missions, including the Probe of Extreme Multi-Messenger Astrophysics (POEMMA). EUSO-SPB2 will consist of two telescopes. The first is a Cherenkov telescope (CT) being developed to identify and estimate the background sources for future below-the-limb very high energy (E>10 PeV) astrophysical neutrino observations, as well as above-the-limb cosmic ray induced signals (E>1 PeV). The second is a fluorescence telescope (FT) being developed for detection of Ultra High Energy Cosmic Rays (UHECRs). In preparation for the expected launch in 2023, extensive simulations tuned by preliminary laboratory measurements have been performed to understand the FT capabilities. The energy threshold has been estimated at 10<sup>18.2</sup> eV, and results in a maximum detection rate at 10<sup>18.6</sup> eV when taking into account the shape of the UHECR spectrum. In addition, onboard software has been developed based on the simulations as well as experience with previous EUSO missions. This includes a level 1 trigger to be run on the computationally limited flight hardware, as well as a deep learning based prioritization algorithm in order to accommodate the balloon's telemetry budget. These techniques could also be used later for future, space-based missions.

DOI： 10.22323/1.395.0405

EUSO@TurLab project in view of Mini-EUSO and EUSO-SPB2 missions Open Access

Miyamoto H., Bertaina M., Barghini D., Battisti M., Belov A., Bisconti F., Blin-Bondil S., Bolmgren K., Cambie G., Capel F., Caruso R., Casolino M., Churilo I., Contino G., Cotto G., Ebisuzaki T., Fenu F., Fuglesang C., Golzio A., Gorodetzky P., Kajino F., Klimov P., Manfrin M., Marcelli L., Marengo M., Marszał W., Mignone M., Parizot E., Picozza P., Piotrowski L.W., Plebaniak Z., Prévôt G., Reali E., Ricci M., Sakaki N., Shinozaki K., Suino G., Szabelski J., Takizawa Y., Youssef A., Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Bartocci S., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Benmessai K., Bertone P.F., Biermann P.L., Blaksley C., Blanc N., Bobik P., Bogomilov M., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Campana D., Capdevielle J.N., Caramete A., Caramete L., Carlson P., Cassardo C., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Crawford H.J.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

The TurLab facility is a laboratory, equipped with a 5 m diameter and 1 m depth rotating tank, located in the fourth basement level of the Physics Department of the University of Turin. In the past years, we have used the facility to perform experiments related to the observations of Extreme Energy Cosmic Rays (EECRs) from space using the fluorescence technique for JEM-EUSO missions with the main objective to test the response of the trigger logic. In the missions, the diffuse night brightness and artificial and natural light sources can vary significantly in time and space in the Field of View (FoV) of the telescope. Therefore, it is essential to verify the detector performance and test the trigger logic under such an environment. By means of the tank rotation, a various terrestrial surface with the different optical characteristics such as ocean, land, forest, desert and clouds, as well as artificial and natural light sources such as city lights, lightnings and meteors passing by the detector FoV one after the other is reproduced. The fact that the tank located in a very dark place enables the tests under an optically controlled environment. Using the Mini-EUSO data taken since 2019 onboard the ISS, we will report on the comparison between TurLab and ISS measurements in view of future experiments at TurLab. Moreover, in the forthcoming months we will start testing the trigger logic of the EUSO-SPB2 mission. We report also on the plans and status for this purpose.

DOI： 10.22323/1.395.0318

EUSO-SPB2 Telescope Optics and Testing Open Access

Kungel V., Bachman R., Brewster J., Dawes M., Desiato J., Eser J., Finch W., Huelett L., Olinto A.V., Pace J., Pech M., Reardon P., Schovanek P., Wang C., Wiencke L., Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Barghini D., Bartocci S., Battisti M., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A.A., Benmessai K., Bertaina M., Bertone P.F., Biermann P.L., Bisconti F., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bolmgren K., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Cambié G., Campana D., Capdevielle J.N., Capel F., Caramete A., Caramete L., Carlson P., Caruso R., Casolino M., Cassardo C., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Dinaucourt P., Djakonow A., Djemil T., Ebersoldt A., Ebisuzaki T., Fenu F., Fernández-González S., Ferrarese S., Filippatos G., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T., Fukushima M., Galeotti P.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

The Extreme Universe Space Observatory - Super Pressure Balloon (EUSO-SPB2) mission will fly two custom telescopes that feature Schmidt optics to measure Čerenkov- and fluorescence-emission of extensive air-showers from cosmic rays at the PeV and EeV-scale, and search for τ-neutrinos. Both telescopes have 1-meter diameter apertures and UV/UV-visible sensitivity. The Čerenkov telescope uses a bifocal mirror segment alignment, to distinguish between a direct cosmic ray that hits the camera versus the Čerenkov light from outside the telescope. Telescope integration and laboratory calibration will be performed in Colorado. To estimate the point spread function and efficiency of the integrated telescopes, a test beam system that delivers a 1-meter diameter parallel beam of light is being fabricated. End-to-end tests of the fully integrated instruments will be carried out in a field campaign at dark sites in the Utah desert using cosmic rays, stars, and artificial light sources. Laser tracks have long been used to characterize the performance of fluorescence detectors in the field. For EUSO-SPB2 an improvement in the method that includes a correction for aerosol attenuation is anticipated by using a bi-dynamic Lidar configuration in which both the laser and the telescope are steerable. We plan to conduct these field tests in Fall 2021 and Spring 2022 to accommodate the scheduled launch of EUSO-SPB2 in 2023 from Wanaka, New Zealand.

DOI： 10.22323/1.395.0412

Estimation of the exposure of the TUS space-based cosmic ray observatory Open Access

Fenu F., Shinozaki K., Zotov M., Bertaina M., Castellina A., Cellino A., Klimov P., Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Barghini D., Bartocci S., Battisti M., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A.A., Benmessai K., Bertone P.F., Biermann P.L., Bisconti F., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bolmgren K., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Cambié G., Campana D., Capdevielle J.N., Capel F., Caramete A., Caramete L., Carlson P., Caruso R., Casolino M., Cassardo C., Catalano O., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Dinaucourt P., Djakonow A., Djemil T., Ebersoldt A., Ebisuzaki T., Eser J., Fenu F., Fernández-González S., Ferrarese S., Filippatos G., Finch W.I., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T., Fukushima M., Galeotti P., García-Ortega E., Gardiol D., Garipov G.K., Gascón E., Gazda E., Genci J.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

The TUS observatory was the first orbital detector aimed at the detection of ultra-high energy cosmic rays (UHECRs). It was launched on April 28, 2016, from the Vostochny cosmodrome in Russia and operated until December 2017. It collected ∼ 80, 000 events with a time resolution of 0.8 μs. A fundamental parameter to be determined for cosmic ray studies is the exposure of an experiment. This parameter is important to estimate the average expected event rate as a function of energy and to calculate the absolute flux in case of event detection. Here we present results of a study aimed to calculate the exposure that TUS accumulated during its mission. The role of clouds, detector dead time, artificial sources, storms, lightning discharges, airglow and moon phases is studied in detail. An exposure estimate with its geographical distribution is presented. We report on the applied technique and on the perspectives of this study in view of the future missions of the JEM-EUSO program.

DOI： 10.22323/1.395.0333

UCIRC2: EUSO-SPB2’s Infrared Cloud Monitor Open Access

Diesing R., Bukowski A., Friedlander N., Miller A., Meyer S., Olinto A.V., Abdellaoui G., Abe S., Adams J.H., Ahriche A., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bacholle S., Baláz J., Bakiri M., Barghini D., Bartocci S., Battisti M., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A., Benmessai K., Bertaina M., Bertone P., Biermann P.L., Bisconti F., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Cambié G., Campana D., Capdevielle J.N., Capel F., Caramete A., Caramete L., Carlson P., Caruso R., Casolino M., Cassardo C., Castellina A., Catalano O., Cellino A., Cerny K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Djakonow A., Djemil T., Ebersoldt A., Ebisuzaki T., Engel R., Eliasson L., Eser J., Fenu F., Fernández-González S., Ferrarese S., Fillapatos G., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T., Fukushima M., Galeotti P., García-Ortega E., Gardiol D., Garipov G., Gascón E., Genci J., Golzio A.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

The second generation of the Extreme Universe Space Observatory on a Super Pressure Balloon (EUSO-SPB2) is a balloon instrument for the detection of ultra high energy cosmic rays (UHECRs) with energies above 1 EeV and very high energy neutrinos with energies above 10 PeV. EUSOSPB2 consists of two telescopes: a fluorescence telescope pointed downward for the detection of UHECRs and a Cherenkov telescope pointed towards the limb for the detection of tau lepton-induced showers produced by up-going tau neutrinos and background signals below the limb. Clouds inside the field of view of these telescopes reduce EUSO-SPB2’s geometric aperture, in particular that of the fluorescence telescope. For this reason, cloud coverage and cloud-top altitude within the field of view of the fluorescence telescope must be monitored throughout data-taking. The University of Chicago Infrared Camera (UCIRC2) will monitor these clouds using two infrared cameras with response centered at wavelengths 10 and 12 microns. By capturing images at wavelengths spanning the cloud thermal emission peak, UCIRC2 will measure cloud color-temperatures and thus cloud-top altitudes. In this contribution, we provide an overview of UCIRC2, including an update on its construction and a discussion of the techniques used to calibrate the instrument.

DOI： 10.22323/1.395.0214

Towards observations of nuclearites in Mini-EUSO Open Access

Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Barghini D., Bartocci S., Battisti M., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A.A., Benmessai K., Bertaina M., Bertone P.F., Biermann P.L., Bisconti F., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bolmgren K., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Cambié G., Campana D., Capdevielle J.N., Capel F., Caramete A., Caramete L., Carlson P., Caruso R., Casolino M., Cassardo C., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Dinaucourt P., Djakonow A., Djemil T., Ebersoldt A., Ebisuzaki T., Eser J., Fenu F., Fernández-González S., Ferrarese S., Filippatos G., Finch W.I., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T., Fukushima M., Galeotti P., García-Ortega E., Gardiol D., Garipov G.K., Gascón E., Gazda E., Genci J., Golzio A., González Alvarado C., Gorodetzky P., Green A., Guarino F., Guépin C., Guzmán A.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

Mini-EUSO is a small orbital telescope with a field of view of 44<sup>◦</sup> × 44<sup>◦</sup>, observing the night-time Earth mostly in 320-420 nm band. Its time resolution spanning from microseconds (triggered) to milliseconds (untriggered) and more than 300 × 300 km of the ground covered, already allowed it to register thousands of meteors. Such detections make the telescope a suitable tool in the search for hypothetical heavy compact objects, which would leave trails of light in the atmosphere due to their high density and speed. The most prominent example are the nuclearites – hypothetical lumps of strange quark matter that could be stabler and denser than the nuclear matter. In this paper, we show potential limits on the flux of nuclearites after collecting 42 hours of observations data.

DOI： 10.22323/1.395.0503

The Mini-EUSO telescope on board the International Space Station: Launch and first results Open Access

Casolino M., Barghini D., Battisti M., Belov A., Bertaina M., Bisconti F., Blaksley C., Bolmgren K., Cafagna F., Cambiè G., Capel F., Ebisuzaki T., Fenu F., Franceschi A., Fuglesang C., Golzio A., Gorodetzki P., Kajino F., Kasuga H., Klimov P., Kungel V., Manfrin M., Marcelli L., Marszał W., Miyamoto H., Mignone M., Napolitano T., Osteria G., Parizot E., Picozza P., Piotrowski L.W., Plebaniak Z., Prévôt G., Reali E., Ricci M., Sakaki N., Shinozaki K., Szabelski J., Takizawa Y., Wada S., Wiencke L., Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Bartocci S., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Benmessai K., Bertone P.F., Biermann P.L., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bozzo E., Briz S., Bruno A., Caballero K.S., Campana D., Capdevielle J.N., Caramete A., Caramete L., Carlson P., Caruso R., Cassardo C., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Dinaucourt P.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

Mini-EUSO is a telescope launched on board the International Space Station in 2019 and currently located in the Russian section of the station. Main scientific objectives of the mission are the search for nuclearites and Strange Quark Matter, the study of atmospheric phenomena such as Transient Luminous Events, meteors and meteoroids, the observation of sea bioluminescence and of artificial satellites and man-made space debris. It is also capable of observing Extensive Air Showers generated by Ultra-High Energy Cosmic Rays with an energy above 10<sup>21</sup> eV and detect artificial showers generated with lasers from the ground. Mini-EUSO can map the night-time Earth in the UV range (290 - 430 nm), with a spatial resolution of about 6.3 km and a temporal resolution of 2.5 μs, observing our planet through a nadir-facing UV-transparent window in the Russian Zvezda module. The instrument, launched on 2019/08/22 from the Baikonur cosmodrome, is based on an optical system employing two Fresnel lenses and a focal surface composed of 36 Multi-Anode Photomultiplier tubes, 64 channels each, for a total of 2304 channels with single photon counting sensitivity and an overall field of view of 44<sup>◦</sup>. Mini-EUSO also contains two ancillary cameras to complement measurements in the near infrared and visible ranges. In this paper we describe the detector and present the various phenomena observed in the first year of operation.

DOI： 10.22323/1.395.0334

The Fluorescence Telescope on board EUSO-SPB2 for the detection of Ultra High Energy Cosmic Rays Open Access

Osteria G., Adams J., Battisti M., Belov A., Bertaina M., Bisconti F., Cafagna F., Campana D., Caruso R., Casolino M., Christi M., Ebisuzaki T., Eser J., Fenu F., Filippatos G., Fornaro C., Guarino F., Klimov P., Kungel V., Mackovjak S., Mese M., Miller M., Miyamoto H., Olinto A., Onel Y., Parizot E., Pech M., Perfetto F., Piotrowski L., Prevot G., Reardon P., Ricci M., Sarazin F., Scotti V., Shinozaki K., Shovanec P., Szabelski J., Takizawa Y., Valore L., Wiencke L., Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Barghini D., Bartocci S., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Benmessai K., Bertone P.F., Biermann P.L., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bolmgren K., Bozzo E., Briz S., Bruno A., Caballero K.S., Cambié G., Capdevielle J.N., Capel F., Caramete A., Caramete L., Carlson P., Cassardo C., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

The Fluorescence Telescope is one of the two telescopes on board the Extreme Universe Space Observatory on a Super Pressure Balloon II (EUSO-SPB2). EUSO-SPB2 is an ultra-long-duration balloon mission that aims at the detection of Ultra High Energy Cosmic Rays (UHECR) via the fluorescence technique (using a Fluorescence Telescope) and of Ultra High Energy (UHE) neutrinos via Cherenkov emission (using a Cherenkov Telescope). The mission is planned to fly in 2023 and is a precursor of the Probe of Extreme Multi-Messenger Astrophysics (POEMMA). The Fluorescence Telescope is a second generation instrument preceded by the telescopes flown on the EUSO-Balloon and EUSO-SPB1 missions. It features Schmidt optics and has a 1-meter diameter aperture. The focal surface of the telescope is equipped with a 6912-pixel Multi Anode Photo Multipliers (MAPMT) camera covering a 37.4 x 11.4 degree Field of Regard. Such a big Field of Regard, together with a flight target duration of up to 100 days, would allow, for the first time from suborbital altitudes, detection of UHECR fluorescence tracks. This contribution will provide an overview of the instrument including the current status of the telescope development.

DOI： 10.22323/1.395.0206

Measurement of UV light emission of the nighttime Earth by Mini-EUSO for space-based UHECR observations Open Access

Shinozaki K., Bolmgren K., Barghini D., Battisti M., Belov A., Bertaina M., Bisconti F., Cambiè G., Capel F., Casolino M., Fenu F., Golzio A., Klimov P., Kungel V., Marcelli L., Miyamoto H., Piotrowski L.W., Plebaniak Z., Przybylak M., Szabelski J., Sakaki N., Takizawa Y., Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Bartocci S., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Benmessai K., Bertone P.F., Biermann P.L., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Campana D., Capdevielle J.N., Caramete A., Caramete L., Carlson P., Caruso R., Cassardo C., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Dinaucourt P., Djakonow A., Djemil T., Ebersoldt A., Ebisuzaki T., Eser J., Fernández-González S., Ferrarese S., Filippatos G., Finch W.I., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T., Fukushima M.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

The JEM-EUSO (Joint Experiment Missions for Extreme Universe Space Observatory) program aims at the realization of the ultra-high energy cosmic ray (UHECR) observation using wide field of view fluorescence detectors in orbit. Ultra-violet (UV) light emission from the atmosphere such as airglow and anthropogenic light on the Earth’s surface are the main background for the space-based UHECR observations. The Mini-EUSO mission has been operated on the International Space Station (ISS) since 2019 which is the first space-based experiment for the program. The Mini-EUSO instrument consists of a 25 cm refractive optics and the photo-detector module with the 2304-pixel array of the multi-anode photomultiplier tubes. On the nadir-looking window of the ISS, the instrument is capable of continuously monitoring a ∼300 km × 300 km area. In the present work, we report the preliminary result of the measurement of the UV light in the nighttime Earth using the Mini-EUSO data downlinked to the ground. We mapped UV light distribution both locally and globally below the ISS obit. Simulations were also made to characterize the instrument response to diffuse background light. We discuss the impact of such light on space-based UHECR observations and the Mini-EUSO science objectives.

DOI： 10.22323/1.395.0385

Overview of the Mini-EUSO μs trigger logic performance Open Access

Battisti M., Barghini D., Belov A., Bertaina M., Bisconti F., Bolmgren K., Cambiè G., Capel F., Casolino M., Ebisuzaki T., Fenu F., Fuglesang C., Golzio A., Gorodetzki P., Kajino F., Klimov P., Manfrin M., Marcelli L., Marszał W., Miyamoto H., Parizot E., Picozza P., Piotrowski L.W., Plebaniak Z., Prévôt G., Reali E., Ricci M., Sakaki N., Shinozaki K., Szabelski J., Takizawa Y., Abdellaoui G., Abe S., Adams J.H., Ahriche A., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bacholle S., Baláz J., Bakiri M., Batisti M., Bartocci S., Zuccaro Marchi A., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Zgura I.S., Benmessai K., Weigand Muñoz R., Bertone P., Biermann P.L., von Ballmoos P., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Campana D., Capdevielle J.N., Zotov M.Y., Caramete A., Caramete L., Carlson P., Caruso R., Caslino M., Cassardo C., Castellina A., Catalano O., Cellino A., Cerny K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

Mini-EUSO is the first detector of the JEM-EUSO program deployed on the ISS. It is a wide field of view telescope currently operating from a nadir-facing UV-transparent window on the ISS. It is based on an array of MAPMTs working in photon counting mode with a 2.5 μs time resolution. Among the different scientific objectives it searches for light signals with time duration compatible to those expected from Extensive Air Showers (EAS) generated by EECRs interacting in the atmosphere. Although the energy threshold for cosmic ray showers is above E > 10<sup>21</sup>eV, due the constraints given by the size of the UV-transparent window, the dedicated trigger logic has been capable of the detection of other interesting classes of events, like elves and ground flashers. An overview of the general performance of the trigger system is provided, with a particular focus on the identification of classes of events responsible for the triggers.

DOI： 10.22323/1.395.0306

Overview of Cherenkov Telescope on-board EUSO-SPB2 for the Detection of Very-High-Energy Neutrinos Open Access

Bagheri M., Bertone P., Fontane I., Gazda E., Judd E.G., Krizmanic J.F., Kuznetsov E.N., Miller M.J., Nachtman J., Onel Y., Nepomuk Otte A., Reardon P.J., Matamala O.R., Wiencke L., Abdellaoui G., Abe S., Adams J.H., Ahriche A., Allard D., Alonso G., Anchordoqui L., Anzalone A., Arnone E., Asano K., Attallah R., Attoui H., Ave Pernas M., Bacholle S., Baláz J., Bakiri M., Barghini D., Bartocci S., Battisti M., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A., Benmessai K., Bertaina M., Yonetoku D., Biermann P.L., Bisconti F., Blaksley C., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Cambié G., Campana D., Capdevielle J.N., Capel F., Caramete A., Caramete L., Carlson P., Caruso R., Casolino M., Cassardo C., Castellina A., Catalano O., Cellino A., Cerny K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Djakonow A., Djemil T., Ebersoldt A., Ebisuzaki T., Engel R., Eliasson L., Eser J., Fenu F., Fernández-González S., Ferrarese S., Fillapatos G., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

We present the status of the development of a Cherenkov telescope to be flown on a long-duration balloon flight, the Extreme Universe Space Observatory Super Pressure Balloon 2 (EUSO-SPB2). EUSO-SPB2 is an approved NASA balloon mission that is planned to fly in 2023 and is a precursor of the Probe of Extreme Multi-Messenger Astrophysics (POEMMA), a candidate for an Astrophysics probe-class mission. The purpose of the Cherenkov telescope on-board EUSOSPB2 is to classify known and unknown sources of backgrounds for future space-based neutrino detectors. Furthermore, we will use the Earth-skimming technique to search for Very-High-Energy (VHE) tau neutrinos below the limb (E > 10 PeV) and observe air showers from cosmic rays above the limb. The 0.785 m<sup>2</sup> Cherenkov telescope is equipped with a 512-pixel SiPM camera covering a 12.8° x 6.4° (Horizontal × Vertical) field of view. The camera signals are digitized with a 100 MS/s readout system. In this paper, we discuss the status of the telescope development, the camera integration, and simulation studies of the camera response.

DOI： 10.22323/1.395.1191

Observation of ELVES with Mini-EUSO telescope on board the International Space Station Open Access

Marcelli L., Arnone E., Barghini M., Battisti M., Belov A., Bertaina M., Blaksley C., Bolmgren K., Cambiè G., Capel F., Casolino M., Ebisuzaki T., Fuglesang C., Gorodetzki P., Kajino F., Klimov P., Marszał W., Mignone M., Parizot E., Picozza P., Piotrowski L.W., Plebaniak Z., Prévôt G., Romoli G., Reali E., Ricci M., Sakaki N., Shinozaki K., Szabelski J., Takizawa Y., Abdellaoui G., Abe S., Adams J.H., Allard D., Alonso G., Anchordoqui L., Anzalone A., Asano K., Attallah R., Attoui H., Ave Pernas M., Bagheri M., Baláz J., Bakiri M., Barghini D., Bartocci S., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Benmessai K., Bertone P.F., Biermann P.L., Bisconti F., Blanc N., Blin-Bondil S., Bobik P., Bogomilov M., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Campana D., Capdevielle J.N., Caramete A., Caramete L., Carlson P., Caruso R., Cassardo C., Castellina A., Catalano O., Cellino A., Černý K., Chikawa M., Chiritoi G., Christl M.J., Colalillo R., Conti L., Cotto G., Crawford H.J., Cremonini R., Creusot A., de Castro Gónzalez A., de la Taille C., del Peral L., Diaz Damian A., Diesing R., Dinaucourt P., Djakonow A.

Proceedings of Science 395 巻 2022年3月

出版者・発行元：Proceedings of Science

Mini-EUSO is a detector observing the Earth in the ultraviolet band from the International Space Station through a nadir-facing window, transparent to the UV radiation, in the Russian Zvezda module. Mini-EUSO main detector consists in an optical system with two Fresnel lenses and a focal surface composed of an array of 36 Hamamatsu Multi-Anode Photo-Multiplier tubes, for a total of 2304 pixels, with single photon counting sensitivity. The telescope also contains two ancillary cameras, in the near infrared and visible ranges, to complement measurements in these bandwidths. The instrument has a field of view of 44<sup>◦</sup>, a spatial resolution of about 6.3 km on the Earth surface and of about 4.7 km on the ionosphere. The telescope detects UV emissions of cosmic, atmospheric and terrestrial origin on different time scales, from a few µs upwards. On the fastest timescale of 2.5 µs, Mini-EUSO is able to observe atmospheric phenomena as Transient Luminous Events and in particular the ELVES, which take place when an electromagnetic wave generated by intra-cloud lightning interacts with the ionosphere, ionizing it and producing apparently superluminal expanding rings of several 100 km and lasting ' 100 µs. These highly energetic fast events have been observed to be produced in conjunction also with Terrestrial Gamma-Ray Flashes and therefore a detailed study of their characteristics (speed, radius, energy ...) is of crucial importance for the understanding of these phenomena. In this paper we present the observational capabilities of ELVE detection by Mini-EUSO and specifically the reconstruction and study of ELVE characteristics.

DOI： 10.22323/1.395.0367

J-PARC/BL05における中性子寿命測定実験：2021年の測定データによる解析の現状 Open Access

松﨑俊, 不破康裕, 長谷川拓郎, 広田克也, 市川豪, 細川律也, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 谷田征輝, 三島賢二, 茂木駿紀, 森川滉己, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 山下了, 矢野浩大, 吉岡瑞樹

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 140 - 140 2022年

J-PARC/BL05における中性子寿命測定実験：2022年までの中性子寿命解析の現状 Open Access

茂木駿紀, 不破康裕, 長谷川拓郎, 広田克也, 細川律也, 市川豪, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 森川滉己, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 谷田征輝, 山下了, 矢野浩大, 吉岡瑞樹

日本物理学会講演概要集 77.2 巻 ( 0 ) 頁： 181 - 181 2022年

J-PARC/BL05における中性子寿命測定実験：TPCを用いた中性子寿命測定における背景事象の調査 Open Access

細川律也, 不破康裕, 長谷川拓郎, 広田克也, 市川豪, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 茂木駿紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 谷田征輝, 山下了, 矢野浩大, 吉岡瑞樹

日本物理学会講演概要集 77.2 巻 ( 0 ) 頁： 180 - 180 2022年

中性子捕獲反応により生じるガンマ線の円偏光度測定のためのポラリメータの開発 Open Access

遠藤駿典, 安部亮太, 石崎貢平, 伊東佑起, 奥隆之, 奥平琢也, 亀田健斗, 河村しほり, 北口雅暁, 木村敦, 酒井健二, 静間俊行, 嶋達志, 清水裕彦, 杉田健人, 全炳俊, 平義隆, 高田秀佐, 広田克也, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 343 - 343 2022年

中性子干渉性散乱を用いる未知の短距離力探索感度向上のためのバックグラウンド抑制装置の開発 Open Access

中部倫太郎, 清水裕彦, 北口雅暁, 近藤亮太, 嶋達志, 廣本政之, 猪野隆, 三島賢二, 吉岡瑞樹

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 385 - 385 2022年

中性子干渉性散乱を用いる未知の短距離力探索感度向上のためのバックグラウンド抑制装置の導入Ⅱ Open Access

中部倫太郎, 清水裕彦, 北口雅暁, 近藤亮太, 嶋達志, 廣本政之, 猪野隆, 三島賢二, 吉岡瑞樹

日本物理学会講演概要集 77.2 巻 ( 0 ) 頁： 309 - 309 2022年

中性子干渉性散乱による未知短距離力探索実験に向けたV-Ni合金ナノ粒子の開発 Open Access

廣本政之, 近藤亮太, 嶋達志, 中部倫太郎, 清水裕彦, 広田克也, 猪野隆, 三島賢二, 北口雅暁, 吉岡瑞樹

日本物理学会講演概要集 77.2 巻 ( 0 ) 頁： 310 - 310 2022年

中性子干渉性散乱による未知短距離力探索に向けたバナジウム粉末の試験測定 Open Access

廣本政之, 近藤亮太, 嶋達志, 中部倫太郎, 清水裕彦, 広田克也, 猪野隆, 三島賢二, 北口雅暁, 吉岡瑞樹

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 384 - 384 2022年

中性子EDM探索のための結晶内電場によるスピン回転の測定Ⅲ Open Access

伊藤茂康, 福村省三, 藤家拓大, 北口雅暁, 清水裕彦

日本物理学会講演概要集 77.2 巻 ( 0 ) 頁： 305 - 305 2022年

中性子EDM探索のための結晶内電場によるスピン回転の測定Ⅱ Open Access

伊藤茂康, 福村省三, 竹森亮太, 赤塚浩明, 北口雅暁, 清水裕彦

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 379 - 379 2022年

ペンデル縞による結晶性の評価とEDM探索での系統誤差に関する考察 Open Access

竹森亮太, 伊藤茂康, 福村省三, 赤塚浩明, 北口雅暁, 清水裕彦

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 380 - 380 2022年

インジウム標的を用いた時間反転対称性の破れ探索に向けた<sup>115</sup>In(n,γ)反応断面積の角度依存性の測定 Open Access

高田秀佐, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 奥隆之, 奥平琢也, 亀田健斗, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 広田克也, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 345 - 345 2022年

Si, Ni, Zn, Agナノ粒子に対する中性子小角散乱による未知相互作用探索2 Open Access

近藤亮太, 廣本政之, 嶋達志, 中部倫太郎, 清水裕彦, 北口雅暁, 猪野隆, 三島賢二, 広田克也, 吉岡瑞樹

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 382 - 382 2022年

Pd同位体のeV中性子捕獲反応における即発γ線測定 Open Access

吉川大幹, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 奥平琢也, 亀田健斗, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 中井飛翔, 広田克也, 藤家拓大, 藤岡宏之, 吉岡瑞樹

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 346 - 346 2022年

J-PARCにおけるミューオニックヘリウム超微細構造精密測定及びミューオニックヘリウム偏極用SEOP装置の開発状況 Open Access

福村省三, 猪野隆, 奥隆之, 奥平琢也, 神田聡太郎, 北口雅暁, 清水裕彦, 下村浩一郎, 鳥居寛之, 西村昇一郎

日本物理学会講演概要集 77.2 巻 ( 0 ) 頁： 361 - 361 2022年

J-PARC/BL05における中性子寿命測定実験：高統計物理ランの現状 Open Access

市川豪, 不破康裕, 長谷川拓郎, 広田克也, 細川律也, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 茂木駿紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 谷田征輝, 山下了, 矢野浩大, 吉岡瑞樹

日本物理学会講演概要集 77.2 巻 ( 0 ) 頁： 179 - 179 2022年

J-PARC/BL05における中性子寿命測定実験：背景事象低減のための中性子入射コリメーターの導入と物理ランの現状 Open Access

市川豪, 不破康裕, 長谷川拓郎, 広田克也, 細川律也, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 茂木駿紀, 森川滉己, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 山下了, 矢野浩大, 吉岡瑞樹

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 139 - 139 2022年

J-PARC/BL05における中性子寿命測定実験：中性子寿命精密測定における背景事象の削減 Open Access

細川律也, 不破康裕, 長谷川拓郎, 広田克也, 市川豪, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 茂木駿紀, 森川滉己, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 山下了, 矢野浩大, 吉岡瑞樹

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 141 - 141 2022年

偏極中性子を用いた<sup>139</sup>La(n,γ)<sup>140</sup>La反応におけるσ<sub>n</sub>・!LaTeX${\hat{k_{\gamma}}$角相関項の測定 Open Access

安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 奥隆之, 奥平琢也, 亀田健斗, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 長谷川拓郎, 広田克也, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 342 - 342 2022年

重力波検出のための変位雑音フリー中性子干渉計の開発 (7) Open Access

岩口翔輝, 川﨑祐輝, 石川智浩, 北口雅暁, 山形豊, 西澤篤志, 清水龍真, 梅村来未, 辻健志, 清水裕彦, 道村唯太, 川村静児

日本物理学会講演概要集 77.2 巻 ( 0 ) 頁： 458 - 458 2022年

重力波検出のための変位雑音フリー中性子干渉計の開発 (6) Open Access

川﨑祐輝, 岩口翔輝, 石川智浩, 西澤篤志, 北口雅暁, 山形豊, 清水龍真, 梅村来未, 辻健志, 清水裕彦, 道村唯太, 川村静児

日本物理学会講演概要集 77.2 巻 ( 0 ) 頁： 457 - 457 2022年

複合核を用いた時間反転対称性の破れの探索-偏極原子核の中性子吸収断面積測定- Open Access

奥平琢也, 石角元志, 伊東佑起, 井出郁央, 遠藤駿典, 奥隆之, 河村しほり, 神原理, 亀田健斗, 北口雅暁, 木村敦, 後藤優, 小林龍珠, 酒井健二, 篠原武尚, 嶋達志, 清水裕彦, 高田秀佐, 高橋慎吾, 高橋竜太, 中部倫太郎, 広田克也, 藤家拓大, 土川雄介, 藤岡宏之, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 77.2 巻 ( 0 ) 頁： 357 - 357 2022年

複合核における時間反転対称性破れの探索-実験の計画と偏極原子核の中性子吸収断面積測定- Open Access

奥平琢也, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 奥隆之, 亀田健斗, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 広田克也, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 341 - 341 2022年

水素吸蔵Vナノ粒子-中性子小角散乱による未知相互作用探索 Open Access

近藤亮太, 廣本政之, 嶋達志, 中部倫太, 清水裕彦, 北口雅暁, 猪野隆, 三島賢二, 広田克也, 吉岡瑞樹

日本物理学会講演概要集 77.2 巻 ( 0 ) 頁： 311 - 311 2022年

時間反転対称性の破れ探索実験のための偏極La核標的開発の現状 Open Access

伊東佑起, 井出郁央, 石崎貢平, 堀田大稀, 清水裕彦, 北口雅暁, 奥平琢也, 松下琢, 飯沼昌隆, 郡英輝, 與曽井優, 藤田全基, 池田陽一, 谷口貴紀, 岩田高広, 宮地義之, 高梨雄矢, 三浦大輔, NOPTREX Collaboration

日本物理学会講演概要集 77.2 巻 ( 0 ) 頁： 358 - 358 2022年

時間反転対称性の破れの探索に向けた偏極 La 標的の開発 -動的核偏極(DNP)テスト用冷凍機の設計/製作及び核磁気共鳴の測定- Open Access

堀田大稀, 石崎貢平, 伊東佑起, 清水裕彦, 北口雅暁, 松下琢, 飯沼昌隆, 郡英輝, 與曽井優, 石元茂

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 344 - 344 2022年

多層膜パルス中性子干渉計の高感度化に向けた開発状況について Open Access

藤家拓大, 日野正裕, 細畠拓也, 市川豪, 北口雅暁, 三島賢二, 関義親, 清水裕彦, 山形豊

日本物理学会講演概要集 77.2 巻 ( 0 ) 頁： 312 - 312 2022年

多層膜パルス中性子干渉計の開発による核散乱長測定の現状 Open Access

藤家拓大, 日野正裕, 細畠拓也, 市川豪, 北口雅暁, 三島賢二, 関義親, 清水裕彦, 山形豊

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 383 - 383 2022年

冷中性子の無損失輸送に向けた磁場勾配ミラーによる中性子反射測定 Open Access

河村しほり, 藤家拓大, 岩下芳久, 北口雅暁, 清水裕彦

日本物理学会講演概要集 77.1 巻 ( 0 ) 頁： 2351 - 2351 2022年

Measurement of nuclear spin relaxation time in lanthanum aluminate for development of polarized lanthanum target Open Access

Ishizaki K., Hotta H., Ide I., Iinuma M., Iwata T., Kitaguchi M., Kohri H., Miura D., Miyachi Y., Ohta T., Shimizu H.M., Yoshikawa H., Yosoi M.

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 1020 巻 2021年12月

記述言語：日本語出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

The nuclear spin–lattice relaxation time (T<inf>1</inf>) of lanthanum and aluminum nuclei in a single crystal of lanthanum aluminate doped with neodymium ions is studied to estimate the feasibility of the dynamically polarized lanthanum target applicable to beam experiments. The application of our interest is the study of fundamental discrete symmetries in the spin optics of epithermal neutrons. This study requires a highly flexible choice of the applied magnetic field for neutron spin control and favors longer T<inf>1</inf> under lower magnetic field and at higher temperature. The T<inf>1</inf> of <sup>139</sup>La and <sup>27</sup>Al was measured under magnetic fields of 0.5–2.5 T and at temperatures of 0.1–1.5 K and found widely distributed up to 100 h. The result suggests that the T<inf>1</inf> can be as long as T<inf>1</inf>∼ 1 h at 0.1 K with a magnetic field of 0.1 T, which partially fulfills the requirement of the neutron beam experiment. Possible improvements to achieve a longer T<inf>1</inf> are discussed.

DOI： 10.1016/j.nima.2021.165845

Pendellösung interferometry probes the neutron charge radius, lattice dynamics, and fifth forces Open Access

Heacock B., Fujiie T., Haun R.W., Henins A., Hirota K., Hosobata T., Huber M.G., Kitaguchi M., Pushin D.A., Shimizu H., Takeda M., Valdillez R., Yamagata Y., Young A.R.

Science 373 巻 ( 6560 ) 頁： 1239 - 1243 2021年9月

記述言語：日本語出版者・発行元：Science

Structure factors describe how incident radiation is scattered from materials such as silicon and germanium and characterize the physical interaction between the material and scattered particles. We used neutron Pendellösung interferometry to make precision measurements of the (220) and (400) neutron-silicon structure factors and achieved a factor-of-four improvement in the (111) structure factor uncertainty. These data provide measurements of the silicon Debye-Waller factor at room temperature and the mean square neutron charge radius 〈r<inf>n</inf><sup>2 〉</sup> ¼ -0:1101T0:0089 square femtometers. Combined with existing measurements of the Debye-Waller factor and charge radius, the measured structure factors also improve constraints on the strength of a Yukawa modification to gravity by an order of magnitude over the 20 picometer–to–10 nanometer length scale range.

DOI： 10.1126/science.abc2794

New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the HIBEAM/NNBAR experiment at the European Spallation Source Open Access

Addazi A., Anderson K., Ansell S., Babu K.S., Barrow J.L., Baxter D.V., Bentley P.M., Berezhiani Z., Bevilacqua R., Biondi R., Bohm C., Brooijmans G., Broussard L.J., Cederc ll J., Crawford C., Dev P.S.B., Dijulio D.D., Dolgov A.D., Dunne K., Fierlinger P., Fitzsimmons M.R., Fomin A., Frost M.J., Gardiner S., Gardner S., Galindo-Uribarri A., Geltenbort P., Girmohanta S., Golubev P., Golubeva E., Greene G.L., Greenshaw T., Gudkov V., Hall-Wilton R., Heilbronn L., Herrero-Garcia J., Holley A., Ichikawa G., Ito T.M., Iverson E., Johansson T., Jönsson L., Jwa Y.J., Kamyshkov Y., Kanaki K., Kearns E., Kokai Z., Kerbikov B., Kitaguchi M., Kittelmann T., Klinkby E., Kobakhidze A., Koerner L.W., Kopeliovich B., Kozela A., Kudryavtsev V., Kupsc A., Lee Y.T., Lindroos M., Makkinje J., Marquez J.I., Meirose B., Miller T.M., Milstead D., Mohapatra R.N., Morishima T., Muhrer G., Mumm H.P., Nagamoto K., Nepomuceno A., Nesti F., Nesvizhevsky V.V., Nilsson T., Oskarsson A., Paryev E., Pattie R.W., Penttil S., Perrey H., Pokotilovski Y.N., Potashnikovav I., Ramic K., Redding C., Richard J.M., Ries D., Rinaldi E., Rizzi N., Rossi N., Ruggles A., Rybolt B., Santoro V., Sarkar U., Saunders A., Senjanovic G., Serebrov A.P., Shimizu H.M., Shrock R., Silverstein S., Silvermyr D., Snow W.M., Takibayev A.

Journal of Physics G Nuclear and Particle Physics 48 巻 ( 7 ) 2021年7月

記述言語：日本語出版者・発行元：Journal of Physics G Nuclear and Particle Physics

The violation of baryon number, is an essential ingredient for the preferential creation of matter over antimatter needed to account for the observed baryon asymmetry in the Universe. However, such a process has yet to be experimentally observed. The HIBEAM/NNBAR program is a proposed two-stage experiment at the European Spallation Source to search for baryon number violation. The program will include high-sensitivity searches for processes that violate baryon number by one or two units: free neutron-antineutron oscillation via mixing, neutron-antineutron oscillation via regeneration from a sterile neutron state , and neutron disappearance (n → n′); the effective process of neutron regeneration is also possible. The program can be used to discover and characterize mixing in the neutron, antineutron and sterile neutron sectors. The experiment addresses topical open questions such as the origins of baryogenesis and the nature of dark matter, and is sensitive to scales of new physics substantially in excess of those available at colliders. A goal of the program is to open a discovery window to neutron conversion probabilities (sensitivities) by up to three orders of magnitude compared with previous searches. The opportunity to make such a leap in sensitivity tests should not be squandered. The experiment pulls together a diverse international team of physicists from the particle (collider and low energy) and nuclear physics communities, while also including specialists in neutronics and magnetics.

DOI： 10.1088/1361-6471/abf429

Energy-dependent angular distribution of individual γ rays in the la 139 (n,γ) la 140 ∗ reaction Open Access

Okudaira T., Endo S., Fujioka H., Hirota K., Ishizaki K., Kimura A., Kitaguchi M., Koga J., Niinomi Y., Sakai K., Shima T., Shimizu H.M., Takada S., Tani Y., Yamamoto T., Yoshikawa H., Yoshioka T.

Physical Review C 104 巻 ( 1 ) 2021年6月

記述言語：日本語出版者・発行元：Physical Review C

Neutron energy-dependent angular distributions were observed for individual γ rays from the 0.74 eV p-wave resonance of La139+n to several lower excited states of La140. The γ-ray signals were analyzed in a two-dimensional histogram of the γ-ray energy, measured with distributed germanium detectors, and neutron energy, determined with the time-of-flight of pulsed neutrons, to identify the neutron energy dependence of the angular distribution for each individual γ rays. The angular distribution was also found for a photopeak accompanied with a faint p-wave resonance component. Our results can be interpreted as interference between s- and p-wave amplitudes, which may be used to study discrete symmetries of fundamental interactions.

DOI： 10.1103/PhysRevC.104.014601

Measurement of γ rays from 6LiF tile as an inner wall of a neutron-decay detector Open Access

Koga J., Ieki S., Kimura A., Kitaguchi M., Kitahara R., Mishima K., Nagakura N., Okudaira T., Otono H., Shimizu H.M., Sumi N., Takada S., Tomita T., Yamada T., Yoshioka T.

Journal of Instrumentation 16 巻 ( 2 ) 2021年2月

記述言語：日本語出版者・発行元：Journal of Instrumentation

A neutron lifetime measurement conducted at the Japan Proton Accelerator Research Complex (J-PARC) is counting the number of electrons from neutron decays with a time projection chamber (TPC). The γ rays produced in the TPC cause irreducible background events. To achieve the precise measurement, the inner walls of the TPC consist of 6Li-enriched lithium-fluoride (6LiF) tiles to suppress the amount of γ rays. In order to estimate the amount of γ rays from the 6LiF tile, prompt gamma ray analysis (PGA) measurements were performed using germanium detectors. We reconstructed the measured γ-ray energy spectrum using a Monte Carlo simulation with the stripping method. Comparing the measured spectrum with a simulated one, the number of γ rays emitted from the6LiF tile was (2.3+0.7-0.3) × 10-4 per incident neutron. This is 1.4+0.5-0.2 times the value assumed for a mole fraction of the 6LiF tile. We concluded that the amount of γ rays produced from the 6LiF tile is not more twice the originally assumed value.

DOI： 10.1088/1748-0221/16/02/P02001

Neutron Imaging Using a Fine-Grained Nuclear Emulsion Open Access

Hirota K., Ariga T., Hino M., Ichikawa G., Kawasaki S., Kitaguchi M., Mishima K., Muto N., Naganawa N., Shimizu H.M.

Journal of Imaging 7 巻 ( 1 ) 2021年1月

記述言語：日本語出版者・発行元：Journal of Imaging

A neutron detector using a fine-grained nuclear emulsion has a sub-micron spatial resolution and thus has potential to be applied as high-resolution neutron imaging. In this paper, we present two approaches to applying the emulsion detectors for neutron imaging. One is using a track analysis to derive the reaction points for high resolution. From an image obtained with a 9 µm pitch Gd grating with cold neutrons, periodic peak with a standard deviation of 1.3 µm was observed. The other is an approach without a track analysis for high-density irradiation. An internal structure of a crystal oscillator chip, with a scale of approximately 30 µm, was able to be observed after an image analysis.

DOI： 10.3390/jimaging7010004

<sup>117</sup>Sn(!LaTeX$\overrightarrow{n}$,γ)反応における捕獲断面積の偏極依存性の測定 Open Access

遠藤駿典, 安部亮太, 石崎貢平, 伊東佑起, 奥隆之, 奥平琢也, 亀田健斗, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 高橋慎吾, 中井飛翔, 広田克也, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 324 - 324 2021年

Bi12GeO20の結晶内電場の再解析とスピン回転についての考察 Open Access

竹森亮太, 赤塚浩明, 菱田真由, 伊藤茂, 福村省三, 北口雅暁, 清水裕彦

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 292 - 292 2021年

<sup>131</sup>Xe(n,γ)<sup>132</sup>Xe*反応におけるγ線角度分布測定 Open Access

奥平琢也, 安部亮太, 伊東佑起, 石崎貢平, 遠藤駿典, 奥隆之, 亀田健斗, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 広田克也, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 323 - 323 2021年

<sup>117</sup>Sn(n,γ)反応断面積の角度依存性の測定結果 Open Access

古賀淳, 安部亮太, 石崎貢平, 井出郁央, 伊東佑起, 猪野隆, 岩本修, 遠藤駿典, 緒方一介, 奥隆之, 奥平琢也, 亀田健斗, 北口雅暁, 木村敦, 鬼柳善明, 酒井健二, 嶋達志, 清水裕彦, 髙田秀佐, 竹谷薫, 多田紘規, 谷結以花, 中井飛翔, 新實裕大, 萩野浩一, 長谷川拓郎, 原田秀郎, 日野正裕, 広田克也, 藤家拓大, 藤岡宏之, 堀田大稀, 細畠拓也, 松崎俊, 三島賢二, 山形豊, 山本知樹, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 407 - 407 2021年

J-PARC/BL05における中性子寿命測定実験：ガス散乱起因背景事象低減に向けた低ガス圧測定の解析 Open Access

茂木駿紀, 長谷川拓郎, 広田克也, 市川豪, 家城斉, 猪野隆, 岩下芳久, 梶原昇吾, 加藤悠, 北口雅暁, 北原龍之介, 古賀淳, 牧瀬壮, 松崎俊, 三島賢二, 森川滉己, 長倉直樹, 岡部宏紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 杉澤悠紀, 角直幸, 角野浩史, 田辺友彦, 富田龍彦, 上原英晃, 山田崇人, 山下了, 矢野浩大, 吉岡瑞樹

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 165 - 165 2021年

中性子干渉性散乱を用いる未知の短距離力探索感度向上のための中性子検出器の試験測定 Open Access

中部倫太郎, 清水裕彦, 北口雅暁, 近藤亮太, 嶋達志, 原周平, 廣本政之, 猪野隆, 広田克也, 三島賢二, 吉岡瑞樹

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 378 - 378 2021年

中性子干渉性散乱を用いる未知の短距離力探索へ向けた実験装置の最適化 Open Access

中部倫太郎, 清水裕彦, 広田克也, 北口雅暁, 近藤亮太, 嶋達志, 原周平, 廣本政之, 猪野隆, 三島賢二, 吉岡瑞樹

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 413 - 413 2021年

中性子干渉性散乱による未知短距離力探索実験に向けたナノ粒子標的の開発2 Open Access

廣本政之, 近藤亮太, 嶋達志, 中部倫太郎, 清水裕彦, 広田克也, 猪野隆, 三島賢二, 北口雅暁, 吉岡瑞樹

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 379 - 379 2021年

中性子干渉性散乱による未知短距離力探索実験に向けたナノ粒子標的の開発 Open Access

廣本政之, 中部倫太郎, 近藤亮太, 広田克也, 猪野隆, 北口雅暁, 三島賢二, 嶋達志, 清水裕彦, 吉岡瑞樹, 原周平

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 411 - 411 2021年

中性子EDM探索のための結晶内電場によるスピン回転の測定 Open Access

伊藤茂康, 福村省三, 竹森亮太, 赤塚浩明, 北口雅暁, 清水裕彦

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 320 - 320 2021年

ミューオニックヘリウム偏極用SEOP装置の開発 Open Access

福村省三, 猪野隆, 奥隆之, 奥平琢也, 神田聡太郎, 北口雅暁, 清水裕彦, 下村浩一郎, 西村昇一郎

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 380 - 380 2021年

ナノ粒子による中性子小角散乱を用いた未知相互作用探索実験 Open Access

近藤亮太, 廣本政之, 嶋達志, 広田克也, 中部倫太郎, 清水裕彦, 北口雅暁, 猪野隆, 三島賢二, 吉岡瑞樹

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 412 - 412 2021年

Si, Ni, Zn, Agナノ粒子に対する中性子小角散乱による未知相互作用探索 Open Access

近藤亮太, 廣本政之, 嶋達志, 中部倫太郎, 清水裕彦, 北口雅暁, 猪野隆, 三島賢二, 広田克也, 吉岡瑞樹

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 377 - 377 2021年

Pd同位体のeV中性子捕獲反応におけるγ線放出角度分布 Open Access

吉川大幹, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 奥平琢也, 亀田健斗, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 中井飛翔, 広田克也, 藤家拓大, 藤岡宏之, 吉岡瑞樹, NOPTREXコラボレーション

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 326 - 326 2021年

n+<sup>131</sup>Xe反応における複合核状態の共鳴パラメータの評価 Open Access

亀田健斗, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 奥隆之, 奥平琢也, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 広田克也, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 327 - 327 2021年

J-PARCパルス中性子源の波長-飛行時間相関の詳細な測定 Open Access

清水春樹, 長谷川拓郎, 広田克也, 市川豪, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 茂木駿紀, 森川滉己, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水裕彦, 角直幸, 角野浩史, 山下了, 矢野浩大, 吉岡瑞樹

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 586 - 586 2021年

J-PARCにおけるミューオニックヘリウム超微細構造精密測定 Open Access

福村省三, 猪野隆, 奥隆之, 奥平琢也, 神田聡太郎, 北口雅暁, 清水裕彦, 下村浩一郎, 西村昇一郎

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 415 - 415 2021年

J-PARC/BL05における中性子寿命測定実験：飛跡形状による背景事象の分類に関する調査 Open Access

松崎俊, 長谷川拓郎, 広田克也, 市川豪, 家城斉, 猪野隆, 岩下芳久, 梶原昇吾, 加藤悠, 北口雅暁, 北原龍之介, 古賀淳, 牧瀬壮, 三島賢二, 茂木駿紀, 森川滉己, 森下彩, 長倉直樹, 中野祐輔, 生出秀行, 岡部宏紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 杉澤悠紀, 角直幸, 角野浩史, 竹谷薫, 田辺友彦, 富田龍彦, 上原英晃, 山田崇人, 山下了, 矢野浩大, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 168 - 168 2021年

J-PARC/BL05における中性子寿命測定実験：大型中性子光学系の導入と高統計物理ランの現状 Open Access

市川豪, 不破康裕, 長谷川拓郎, 日野正裕, 広田克也, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 茂木駿紀, 森川滉己, 岡部宏紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 山下了, 矢野浩大, 吉岡瑞樹

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 164 - 164 2021年

J-PARC/BL05における中性子寿命測定実験：大型スピンフリップチョッパーの導入 Open Access

市川豪, 長谷川拓郎, 広田克也, 猪野隆, 岩下芳久, 北口雅暁, 古賀淳, 松崎俊, 三島賢二, 茂木駿紀, 森川滉己, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 角直幸, 角野浩史, 山下了, 矢野浩大, 吉岡瑞樹

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 293 - 293 2021年

J-PARC/BL05における中性子寿命測定実験：中性子寿命解析の現状 Open Access

茂木駿紀, 長谷川拓郎, 広田克也, 市川豪, 家城斉, 猪野隆, 岩下芳久, 梶原昇吾, 加藤悠, 北口雅暁, 北原龍之介, 古賀淳, 牧瀬壮, 松崎俊, 三島賢二, 森川滉己, 森下彩, 長倉直樹, 中野祐輔, 生出秀行, 岡部宏紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 杉澤悠紀, 角直幸, 角野浩史, 竹谷薫, 田辺友彦, 富田龍彦, 上原英晃, 山田崇人, 山下了, 矢野浩大, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 167 - 167 2021年

J-PARC/BL05における中性子寿命測定実験：中性子ガス散乱起因の背景事象についての調査 Open Access

長谷川拓郎, 広田克也, 市川豪, 家城斉, 猪野隆, 岩下芳久, 梶原昇吾, 加藤悠, 北口雅暁, 北原龍之介, 古賀淳, 牧瀬壮, 松崎俊, 三島賢二, 茂木駿紀, 森川滉己, 森下彩, 長倉直樹, 中野祐輔, 生出秀行, 岡部宏紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 杉澤悠紀, 角直幸, 角野浩史, 竹谷薫, 田辺友彦, 富田龍彦, 上原英晃, 山田崇人, 山下了, 矢野浩大, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 295 - 295 2021年

J-PARC/BL05における中性子寿命測定実験：シミュレーションの高度化 Open Access

森川滉己, 長谷川拓郎, 広田克也, 市川豪, 家城斉, 猪野隆, 岩下芳久, 梶原昇吾, 加藤悠, 北口雅暁, 北原龍之介, 古賀淳, 牧瀬壮, 松崎俊, 三島賢二, 茂木駿紀, 森下彩, 長倉直樹, 中野祐輔, 生出秀行, 岡部宏紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水春樹, 清水裕彦, 杉澤悠紀, 角直幸, 角野浩史, 竹谷薫, 田辺友彦, 富田龍彦, 上原英晃, 山田崇人, 山下了, 矢野浩大, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 294 - 294 2021年

偏極中性子を用いた<sup>139</sup>La(n,γ) 反応における角相関項の測定 Open Access

安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 奥隆之, 奥平琢也, 亀田健斗, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 広田克也, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 325 - 325 2021年

複合核反応を用いた時間反転対称性の破れ探索実験の現状 Open Access

北口雅暁, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 奥隆之, 奥平琢也, 亀田健斗, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 広田克也, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 322 - 322 2021年

複合核反応を用いた時間反転対称性の破れ探索実験に向けた，熱外中性子反射光学の検証 Open Access

藤家拓大, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 奥平琢也, 亀田健斗, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 中井飛翔, 広田克也, 藤岡宏之, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 329 - 329 2021年

結晶回折を用いた中性子EDM測定のための結晶の評価 Open Access

菱田真由, 伊藤茂康, 福村省三, 竹森亮太, 赤塚浩明, 北口雅暁, 清水裕彦

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 291 - 291 2021年

時間反転対称性の破れ探索実験のための偏極La核標的開発の現状 Open Access

安倍学, 飯沼昌隆, 池上弘樹, 池田陽一, 石黒亮輔, 石崎貢平, 石元茂, 伊東佑起, 井出郁央, 猪野隆, 岩田高広, 上坂友洋, 大友季哉, 奥隆之, 神田浩樹, 北口雅暁, 郡英輝, 嶋達志, 清水裕彦, 高橋大輔, 高橋義朗, 立石健一郎, 谷口貴紀, 広田克也, 藤田全基, 堀田大稀, 松下琢, 三浦大輔, 宮地義之, 山形豊, 吉川大幹, 與曽井優, 和田真一, 和田信雄, NOPTREX collaboration

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 409 - 409 2021年

時間反転対称性の破れの探索に向けた偏極 La 標的の開発- DNPテスト用冷凍機の整備 - Open Access

堀田大稀, 石崎貢平, 井出郁央, 伊東佑起, 清水裕彦, 北口雅暁, 松下琢, 飯沼昌隆, 郡英輝, 與曽井優, 石元茂

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 410 - 410 2021年

時間反転対称性の破れの探索に向けた<sup>131</sup>Xe(n,γ) 反応の放出角度依存性に関する解析 Open Access

谷結以花, 安部亮太, 石崎貢平, 井出郁央, 伊東佑起, 猪野隆, 岩本修, 遠藤駿典, 緒方一介, 奥隆之, 奥平琢也, 亀田健斗, 北口雅暁, 木村敦, 鬼柳善明, 古賀淳, 酒井健二, 嶋達志, 清水裕彦, 髙田秀佐, 竹谷薫, 多田紘規, 中井飛翔, 新實裕大, 萩野浩一, 長谷川拓郎, 原田秀郎, 日野正裕, 広田克也, 藤家拓大, 藤岡宏之, 堀田大稀, 細畠拓也, 松崎俊, 三島賢二, 山形豊, 山本知樹, 吉岡瑞樹, 吉川大幹, NOPTREXコラボレーション

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 408 - 408 2021年

多層膜パルス中性子干渉計の開発について Open Access

藤家拓大, 北口雅暁, 日野正裕, 関義親, 三島賢二, 市川豪, 山形豊, 細畠拓也, 清水裕彦

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 290 - 290 2021年

動力学的回折理論に基づく回折強度分布の測定 Open Access

竹森亮太, 伊藤茂康, 福村省三, 赤塚浩明, 北口雅暁, 清水裕彦

日本物理学会講演概要集 76.2 巻 ( 0 ) 頁： 321 - 321 2021年

動力学的回折における強度の理論と結果 Open Access

赤塚浩明, 竹森亮太, 菱田真由, 伊藤茂, 福村省三, 北口雅暁, 清水裕彦

日本物理学会講演概要集 76.1 巻 ( 0 ) 頁： 2383 - 2383 2021年

Neutron lifetime measurement with pulsed cold neutrons Open Access

Hirota K., Ichikawa G., Ieki S., Ino T., Iwashita Y., Kitaguchi M., Kitahara R., Koga J., Mishima K., Mogi T., Morikawa K., Morishita A., Nagakura N., Oide H., Okabe H., Otono H., Seki Y., Sekiba D., Shima T., Shimizu H.M., Sumi N., Sumino H., Tomita T., Uehara H., Yamada T., Yamashita S., Yano K., Yokohashi M., Yoshioka T.

Progress of Theoretical and Experimental Physics 2020 巻 ( 12 ) 2020年12月

記述言語：日本語出版者・発行元：Progress of Theoretical and Experimental Physics

The neutron lifetime has been measured by comparing the decay rate with the reaction rate of 3He nuclei of a pulsed neutron beam from the spallation neutron source at the Japan Proton Accelerator Research Complex (J-PARC). The decay rate and the reaction rate were determined by simultaneously detecting electrons from the neutron decay and protons from the 3He(n,p)3H reaction using a gas chamber, the working gas of which contains diluted 3He. The measured neutron lifetime was 898 ± 10stat+15-18 sys s.

DOI： 10.1093/ptep/ptaa169

超流動<sup>4</sup>He中の流れ場可視化にむけた中性子<sup>3</sup>He吸収反応による<sup>4</sup>He励起分子集団生成の実証

松下琢, Volker Sonnenschein, 井口哲夫, 伊藤大介, 北口雅暁, 鬼柳善明, Wei Guo, 齊藤泰司, 篠原武尚, 清水裕彦, 鈴木颯, 辻義之, 富田英生, 林田洋寿, 菱田真由, 廣井孝介, 広田克也, 丸山巧, 脇慎一郎, 和田信雄

波紋 30 巻 ( 4 ) 頁： 192 - 196 2020年11月

A Multi-Center Contouring Study of Spinal Cord Comparing MRI and Myelo-CT Fusion Open Access

Tanaka H., Aoyama T., Shimizu H., Tachibana H., Koide Y., Miyauchi R., Wakabayashi K., Ooshima Y., Adachi S., Kozai Y., Kodaira T.

INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS 108 巻 ( 3 ) 頁： E377 - E377 2020年11月

Development and application of a 3He Neutron Spin Filter at J-PARC Open Access

Okudaira T., Oku T., Ino T., Hayashida H., Kira H., Sakai K., Hiroi K., Takahashi S., Aizawa K., Endo H., Endo S., Hino M., Hirota K., Honda T., Ikeda K., Kakurai K., Kambara W., Kitaguchi M., Oda T., Ohshita H., Otomo T., Shimizu H.M., Shinohara T., Suzuki J., Yamamoto T.

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 977 巻 2020年10月

記述言語：日本語出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

We are developing a neutron polarizer with polarized <sup>3</sup>He gas, referred to as a <sup>3</sup>He spin filter, based on the Spin Exchange Optical Pumping (SEOP) for polarized neutron scattering experiments at Materials and Life Science Experimental Facility (MLF) of Japan Proton Accelerator Research Complex (J-PARC). A <sup>3</sup>He gas-filling station was constructed at J-PARC, and several <sup>3</sup>He cells with long spin relaxation times have been fabricated using the gas-filling station. A laboratory has been prepared in the MLF beam hall for polarizing <sup>3</sup>He cells, and compact pumping systems with laser powers of 30 W and 110 W, which can be installed onto a neutron beamline, have been developed. A <sup>3</sup>He polarization of 85% was achieved at a neutron beamline by using the pumping system with the 110 W laser. Recently, the first user experiment utilizing the <sup>3</sup>He spin filter was conducted, and there have been several more since then. The development and utilization of <sup>3</sup>He spin filters at MLF of J-PARC are reported.

DOI： 10.1016/j.nima.2020.164301

A candidate secular variation model for IGRF-13 based on MHD dynamo simulation and 4DEnVar data assimilation Open Access

Minami Takuto, Nakano Shin'ya, Lesur Vincent, Takahashi Futoshi, Matsushima Masaki, Shimizu Hisayoshi, Nakashima Ryosuke, Taniguchi Hinami, Toh Hiroaki

EARTH PLANETS AND SPACE 72 巻 ( 1 ) 2020年9月

記述言語：日本語出版者・発行元：Earth, Planets and Space

We have submitted a secular variation (SV) candidate model for the thirteenth generation of International Geomagnetic Reference Field model (IGRF-13) using a data assimilation scheme and a magnetohydrodynamic (MHD) dynamo simulation code. This is the first contribution to the IGRF community from research groups in Japan. A geomagnetic field model derived from magnetic observatory hourly means, and CHAMP and Swarm-A satellite data, has been used as input data to the assimilation scheme. We adopt an ensemble-based assimilation scheme, called four-dimensional ensemble-based variational method (4DEnVar), which linearizes outputs of MHD dynamo simulation with respect to the deviation from a dynamo state vector at an initial condition. The data vector for the assimilation consists of the poloidal scalar potential of the geomagnetic field at the core surface and flow velocity field slightly below the core surface. Dimensionless time of numerical geodynamo is adjusted to the actual time by comparison of secular variation time scales. For SV prediction, we first generate an ensemble of dynamo simulation results from a free dynamo run. We then assimilate the ensemble to the data with a 10-year assimilation window through iterations, and finally forecast future SV by the weighted sum of the future extension parts of the ensemble members. Hindcast of the method for the assimilation window from 2004.50 to 2014.25 confirms that the linear approximation holds for 10-year assimilation window with our iterative ensemble renewal method. We demonstrate that the forecast performance of our data assimilation and forecast scheme is comparable with that of IGRF-12 by comparing data misfits 4.5 years after the release epoch. For estimation of our IGRF-13SV candidate model, we set assimilation window from 2009.50 to 2019.50. We generate our final SV candidate model by linear fitting for the weighted sum of the ensemble MHD dynamo simulation members from 2019.50 to 2025.00. We derive errors of our SV candidate model by one standard deviation of SV histograms based on all the ensemble members.[Figure not available: see fulltext.].

DOI： 10.1186/s40623-020-01253-8

Fluorescence Imaging of He<sub>2</sub><i><sup>* </sup></i>Excimers generated by neutron and gamma irradiation of superfluid Helium using a cold neutron beamline at J-PARC / MLF

Sonnenschein Volker Thomas, Matsushita Taku, Tsuji Yoshiyuki, Guo Wei, Hayashida Hiroshi, Hirota Katsuya, Kosuke Hiroi, Maruyama Takumi, Hishida Mayu, Tomita Hideki, Ito Daisuke, Kitaguchi Masaaki, Kiyanagi Yoshiaki, Sou Suzuki, Saito Yasushi, Shimizu Hirohiko, Shinohara Takenao, Wada Nobuo

JSAP Annual Meetings Extended Abstracts 2020.2 巻 ( 0 ) 頁： 287 - 287 2020年8月

3-D Intrinsic and Scattering Seismic Attenuation Structures Beneath Kyushu, Japan Open Access

Shito A., Matsumoto S., Ohkura T., Shimizu H., Sakai S., Iio Y., Takahashi H., Yakiwara H., Watanabe T., Kosuga M., Okada T., Yoshimi M., Asano Y.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 125 巻 ( 8 ) 2020年8月

記述言語：日本語出版者・発行元：Journal of Geophysical Research: Solid Earth

The attenuation of seismic wave energy is caused by intrinsic absorption and scattering. The former involves the conversion of seismic wave energy to heat energy via internal friction due to the anelasticity of the medium, whereas the latter involves the scattering of seismic wave energy due to random elastic heterogeneities in the medium. Quantifying both intrinsic ((Formula presented.)) and scattering ((Formula presented.)) attenuation is therefore important for understanding the physical properties of the Earth's interior and predicting seismic wave propagation. Here we develop a new procedure to separately map three-dimensional (3-D) (Formula presented.) and (Formula presented.) structures. The path-averaged (Formula presented.) and (Formula presented.) values are obtained via an envelope-fitting approach that employs a multiple-scattering model. The path-averaged (Formula presented.) and (Formula presented.) structures are then mapped into 3-D space using a tomographic inversion technique based on sensitivity kernels, which are calculated from a Monte Carlo simulation of the radiative transfer equations. We apply this method to map the crustal structure beneath Kyushu, Japan, and obtain 3-D (Formula presented.) and (Formula presented.) structures for the 1–2, 2–4, and 4–8 Hz frequency bands. The spatial attenuation patterns are similar for each of the analyzed frequency bands, with the spatial variability in (Formula presented.) being more pronounced than that in (Formula presented.). The high- (Formula presented.) and (Formula presented.) regions correspond to the locations of active volcanoes. Conversely, the northern Kyushu area possesses low- (Formula presented.) and (Formula presented.) zones that correspond to low heat flow and Cretaceous granite, respectively. The overall (Formula presented.) and (Formula presented.) distributions correlate with thermal and geological structures, respectively.

DOI： 10.1029/2019JB018742

Neutron spin dynamics in polarized targets Open Access

Gudkov V., Shimizu H.M.

Physical Review C 102 巻 ( 1 ) 2020年7月

記述言語：日本語出版者・発行元：Physical Review C

We present the neutron elastic scattering amplitude for an arbitrarily polarized target in an irreducible spherical-tensor representation. The general approach for the description of neutron spin dynamics for propagation through the medium with an arbitrary polarization is discussed in relation to the search for a time-reversal invariance violation in neutron scattering.

DOI： 10.1103/PhysRevC.102.015503

Transverse asymmetry of γ rays from neutron-induced compound states of La 140 Open Access

Yamamoto T., Okudaira T., Endo S., Fujioka H., Hirota K., Ino T., Ishizaki K., Kimura A., Kitaguchi M., Koga J., Makise S., Niinomi Y., Oku T., Sakai K., Shima T., Shimizu H.M., Takada S., Tani Y., Yoshikawa H., Yoshioka T.

Physical Review C 101 巻 ( 6 ) 2020年6月

記述言語：日本語出版者・発行元：Physical Review C

An sp-mixing model, which describes a compound nuclear reaction by mixing partial waves, predicts a correlation term in this reaction. A detailed study of the sp-mixing model is required to study the feasibility of a new type of time reversal symmetry violation search experiment. The correlation term σn·(kn×kγ) in the La139(n - ,γ) reaction has been studied by measuring γ-ray and neutron energies utilizing epithermal polarized neutrons and germanium detectors. The transverse asymmetry for single γ-ray transition was measured to be 0.60±0.19 in the p-wave resonance.

DOI： 10.1103/PhysRevC.101.064624

An experimental setup for creating and imaging 4 He 2∗ excimer cluster tracers in superfluid helium-4 via neutron-3He absorption reaction

Sonnenschein V., Tsuji Y., Kokuryu S., Kubo W., Suzuki S., Tomita H., Kiyanagi Y., Iguchi T., Matsushita T., Wada N., Kitaguchi M., Shimizu H.M., Hirota K., Shinohara T., Hiroi K., Hayashida H., Guo W., Ito D., Saito Y.

Review of Scientific Instruments 91 巻 ( 3 ) 2020年3月

記述言語：日本語出版者・発行元：Review of Scientific Instruments

For the purpose of future visualization of the flow field in superfluid helium-4, clusters of the triplet state excimer <sup>4</sup>He<inf>2</inf><sup>*</sup> are generated along the micro-scale recoil tracks of the neutron-absorption reaction n + <sup>3</sup>He → <sup>3</sup>T + p. This reaction is induced by neutron irradiation of the <sup>3</sup>He fraction contained in natural isotopic abundance liquid helium with neutron beams either from the Japan Proton Accelerator Research Complex, Materials and Life Science Experimental Facility (JPARC)/Materials and Life Science Experimental Facility or from the Kyoto University Institute for Integrated Radiation and Nuclear Science. These <sup>4</sup>He<inf>2</inf><sup>*</sup> clusters are expected to be ideal tracers of the normal-fluid component in superfluid helium with several advantageous properties. Evidence of the excimer generation is inferred by detection of laser induced fluorescence emitted from the <sup>4</sup>He<inf>2</inf><sup>*</sup> clusters excited by a purpose-built short pulse gain-switched titanium:sapphire (Ti:sa) laser operating at a wavelength of 905 nm. The setup and performance characteristics of the laser system including the Ti:sa and two continuous wave re-pumping lasers are described. Detection at the fluorescence wavelength of 640 nm is performed by using optical bandpass filtered photomultiplier tubes (PMT). Electrical noise in the PMT acquisition traces could successfully be suppressed by post-processing with a simple algorithm. Despite other laser-related backgrounds, the excimer was clearly identified by its fluorescence decay characteristics. Production of the excimer was found to be proportional to the neutron flux, adjusted via insertion of different collimators into the neutron beam. These observations suggest that the apparatus we constructed does function in the expected manner and, therefore, has the potential for groundbreaking turbulence research with superfluid helium.

DOI： 10.1063/1.5130919

New energy-degrading beamline for in-flight RI beams, OEDO

Michimasa S., Imai N., Dozono M., Hwang J.W., Yamada K., Ota S., Yoshida K., Yanagisawa Y., Kusaka K., Ohtake M., Matsushita M., Ahn D.S., Beliuskina O., Chiga N., Chikaato K., Fukuda N., Hayakawa S., Ideguchi E., Iribe K., Iwamoto C., Kawase S., Kawata K., Kitamura N., Masuoka S., Miyatake H., Nagae D., Nakajima R., Nakamura T., Nakano K., Omika S., Otsu H., Sakurai H., Schrock P., Shimizu H., Shimizu Y., Sumikama T., Sun X., Suzuki D., Suzuki H., Takaki M., Takechi M., Takeda H., Takeuchi S., Teranishi T., Tsunoda R., Wang H., Watanabe Y., Watanabe Y.X., Wimmer K., Yako K., Yamaguchi H., Yang L., Yoshida H., Shimoura S.

Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms 463 巻頁： 143 - 147 2020年1月

出版者・発行元：Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

The Optimized Energy Degrading Optics (OEDO) beamline was constructed at RIBF to produce slowed-down, well-focused radioactive-isotope beams at 10–50 MeV/u, and began operation in June 2017. We examined the performance of the OEDO system by decelerating high-energy medium-mass radioactive ions. The main components of the OEDO beamline are two superconducting quadrupole triplet magnets and one radio-frequency deflector. This paper introduces the unique design of the ion optics of the beamline and describes the achieved performance of the beamline in the commissioning and following physics experiments. We will discuss the properties of energy-degraded beams produced by the OEDO beamline by comparison of simulations and the achieved performance.

DOI： 10.1016/j.nimb.2019.06.006

J-PARC/BL05における中性子寿命測定実験：SFCアップグレード Open Access

岡部宏紀, 日野正裕, 広田克也, 家城斉, 猪野隆, 岩下芳久, 北口雅暁, 北原龍之介, 古賀淳, 三島賢二, 森下彩, 中野祐輔, 長倉直樹, 小田達郎, 生出秀行, 音野瑛俊, 関義親, 関場大一郎, 嶋達志, 清水裕彦, 角直幸, 角野浩史, 竹谷薫, 富田龍彦, 上原英晃, 山田崇人, 山下了, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 72 - 72 2020年

結晶回折を用いた中性子EDM測定のための結晶内電場測定 Open Access

菱田真由, 伊藤茂, 福村省三, 北口雅暁, 清水裕彦

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 276 - 276 2020年

弱い相互作用におけるローレンツ不変性の破れ探索実験 Open Access

竹中黎, 尾崎早智, 梶原拓真, 北口雅暁, 後藤文也, 清水裕彦, 清水裕太, 田村晃太郎, 益田英知, 山脇友志, 渡辺悦子, 村田次郎

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 313 - 313 2020年

余剰次元重力による中性子干渉性散乱を記述するモデルの開発 Open Access

近藤亮太, 廣本政之, 堀太地, 大井法子, 広田克也, 猪野隆, 北口雅暁, 三島賢二, 嶋達志, 清水裕彦, 原周平, 吉岡瑞樹

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 315 - 315 2020年

中性子複合核共鳴吸収における時間反転対称性探索に向けた偏極標的研究の進捗 2019 Open Access

石崎貢平, 飯沼昌隆, 池田陽一, 池上弘樹, 石黒亮輔, 石元茂, 井出郁央, 猪野隆, 岩田高広, 上坂友洋, 大友季哉, 奥隆之, 神田浩樹, 北口雅暁, 郡英輝, 嶋達志, 清水裕彦, 高橋大輔, 高橋義朗, 藤田全基, 堀田大稀, 松下琢, 三浦大輔, 宮地義之, 吉川大幹, 與曽井優, 和田信雄, 他 NOPTREX collaboration

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 310 - 310 2020年

中性子干渉性散乱を用いた未知短距離力探索実験における検出器の性能評価 Open Access

中部倫太郎, 清水裕彦, 広田克也, 北口雅暁, 近藤亮太, 嶋達志, 原周平, 廣本政之, 猪野隆, 三島賢二, 吉岡瑞樹

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 317 - 317 2020年

中性子干渉性散乱による未知短距離力探索実験に向けたナノ粒子標的の応答測定 Open Access

廣本政之, 中部倫太郎, 近藤亮太, 広田克也, 猪野隆, 北口雅暁, 三島賢二, 嶋達志, 清水裕彦, 吉岡瑞樹, 原周平

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 316 - 316 2020年

中性子回折を用いた未知相互作用の探索について Open Access

藤家拓大, 清水裕彦, 北口雅暁, 山形豊, 細畠拓也, 竹田真宏

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 74 - 74 2020年

中性子EDM探索実験のための結晶内電場によるスピン回転の測定 Open Access

伊藤茂康, 福村省三, 菱田真由, 北口雅暁, 清水裕彦

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 275 - 275 2020年

パルス中性子対応干渉計の開発 Open Access

山本奈々, 北口雅暁, 清水裕彦, 関義親, 三島賢二

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 318 - 318 2020年

NOPTREX実験に向けた偏極La標的の開発-超偏極実験用クライオスタットの立ち上げ- Open Access

堀田大稀, 石崎貢平, 井出郁央, 清水裕彦, 北口雅暁, 飯沼昌隆, 郡英輝, 與曽井優, 吉川大幹, 石元茂

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 335 - 335 2020年

NOPTREX実験に向けた偏極La標的の開発-LaAlO<sub>3</sub>のスピン格子緩和測定- Open Access

井出郁央, 石崎貢平, 清水裕彦, 北口雅暁, 飯沼昌隆, 郡英輝, 與曽井優, 吉川大幹, 宮地義之, 三浦大輔, 石元茂

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 311 - 311 2020年

MTV実験の報告3 Open Access

尾﨑早智, 梶原拓真, 川村広和, 北口雅暁, 後藤文也, 坂元祐子, 清水裕彦, 清水裕太, 竹中黎, 田中佐季, 田沼良介, 田村晃太郎, 戸塚祐実, 中谷祐輔, 馬場秀忠, 益田英知, 山脇友志, 横橋麻美, 吉田立, 渡辺悦子, 村田次郎

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 280 - 280 2020年

MTV実験の報告2 Open Access

後藤文也, 尾﨑早智, 梶原拓真, 川村広和, 北口雅暁, 坂元祐子, 清水裕彦, 清水裕太, 竹中黎, 田中佐季, 田沼良介, 田村晃太郎, 戸塚祐実, 中谷祐輔, 馬場秀忠, 益田英知, 村田次郎, 山脇友志, 横橋麻美, 渡辺悦子

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 279 - 279 2020年

MTV実験の報告1 Open Access

田村晃太郎, 尾崎早智, 梶原拓真, 川村広和, 北口雅暁, 後藤文也, 坂元祐子, 清水裕彦, 清水裕太, 竹中黎, 田中佐季, 田沼良介, 戸塚祐実, 中谷祐輔, 馬場秀忠, 益田英知, 村田次郎, 山脇友志, 横橋麻美, 渡辺悦子

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 278 - 278 2020年

J-PARC/BL05における中性子寿命測定実験：バックグラウンドと系統誤差の評価 Open Access

市川豪, 広田克也, 家城斉, 猪野隆, 岩下芳久, 梶原昇吾, 加藤悠, 北口雅暁, 北原龍之介, 古賀淳, 牧瀬壮, 三島賢二, 茂木駿紀, 森川滉己, 森下彩, 長倉直樹, 中野祐輔, 生出秀行, 岡部宏紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水裕彦, 杉澤悠紀, 角直幸, 角野浩史, 竹谷薫, 田辺友彦, 富田龍彦, 上原英晃, 山田崇人, 山下了, 矢野浩大, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 70 - 70 2020年

J-PARC/BL05における中性子寿命測定実験：TPC動作ガス中の<sup>3</sup>He含有率評価 Open Access

森川滉己, 広田克也, 市川豪, 家城斉, 猪野隆, 岩下芳久, 梶原昇吾, 加藤悠, 北口雅暁, 北原龍之介, 古賀淳, 牧瀬壮, 三島賢二, 茂木駿紀, 森下彩, 長倉直樹, 中野祐輔, 生出秀行, 岡部宏紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水裕彦, 杉澤悠紀, 角直幸, 角野浩史, 竹谷薫, 田辺友彦, 富田龍彦, 上原英晃, 山田崇人, 山下了, 矢野浩大, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 71 - 71 2020年

J-PARC/BL05における中性子寿命測定実験：2019年までの測定結果 Open Access

茂木駿紀, 広田克也, 市川豪, 家城斉, 猪野隆, 岩下芳久, 梶原昇吾, 加藤悠, 北口雅暁, 北原龍之介, 古賀淳, 牧瀬壮, 三島賢二, 森川滉己, 森下彩, 長倉直樹, 中野祐輔, 生出秀行, 岡部宏紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水裕彦, 杉澤悠紀, 角直幸, 角野浩史, 竹谷薫, 田辺友彦, 富田龍彦, 上原英晃, 山田崇人, 山下了, 矢野浩大, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 75.2 巻 ( 0 ) 頁： 143 - 143 2020年

J-PARC/BL05における中性子寿命測定実験：MCを用いたバックグラウンドの系統誤差の検証 Open Access

矢野浩大, 広田克也, 市川豪, 家城斉, 猪野隆, 岩下芳久, 梶原昇吾, 加藤悠, 北口雅暁, 北原龍之介, 古賀淳, 牧瀬壮, 三島賢二, 茂木駿紀, 森川滉己, 森下彩, 長倉直樹, 中野祐輔, 生出秀行, 岡部宏紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水裕彦, 杉澤悠紀, 角直幸, 角野浩史, 竹谷薫, 田辺友彦, 富田龍彦, 上原英晃, 山田崇人, 山下了, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 75.2 巻 ( 0 ) 頁： 299 - 299 2020年

J-PARC/BL05における中性子寿命測定実験：中性子β崩壊事象/中性子<sup>3</sup>He反応事象切り分け解析 Open Access

森川滉己, 広田克也, 市川豪, 家城斉, 猪野隆, 岩下芳久, 梶原昇吾, 加藤悠, 北口雅暁, 北原龍之介, 古賀淳, 牧瀬壮, 三島賢二, 茂木駿紀, 森下彩, 長倉直樹, 中野祐輔, 生出秀行, 岡部宏紀, 音野瑛俊, 關義親, 関場大一郎, 嶋達志, 清水裕彦, 杉澤悠紀, 角直幸, 角野浩史, 竹谷薫, 田辺友彦, 富田龍彦, 上原英晃, 山田崇人, 山下了, 矢野浩大, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 75.2 巻 ( 0 ) 頁： 298 - 298 2020年

中性子複合核共鳴吸収反応を利用した時間反転対称性の破れの探索に向けた偏極 La 標的の開発-クライオスタットの整備- Open Access

堀田大稀, 飯沼昌隆, 池上弘樹, 石黒亮輔, 石崎貢平, 井出郁央, 石元茂, 猪野隆, 岩田高広, 上坂友洋, 大友季哉, 奥隆之, 神田浩樹, 北口雅暁, 郡英輝, 嶋達志, 清水裕彦, 高橋大輔, 高橋義朗, 松下琢, 三浦大輔, 宮地義之, 與曽井優, 吉川大幹, 和田信雄, NOPTREX collaboration

日本物理学会講演概要集 75.2 巻 ( 0 ) 頁： 317 - 317 2020年

中性子複合核共鳴吸収反応における時間反転対称性の破れの探索に向けた偏極La標的の開発 Open Access

井出郁央, 安倍学, 飯沼昌隆, 池上弘樹, 池田陽一, 石黒亮輔, 石崎貢平, 石元茂, 猪野隆, 岩田高広, 上坂友洋, 大友季哉, 奥隆之, 神田浩樹, 北口雅暁, 郡英輝, 嶋達志, 清水裕彦, 高橋大輔, 高橋義朗, 谷口貴紀, 藤田全基, 堀田大稀, 松下琢, 三浦大輔, 宮地義之, 與曽井優, 和田真一, 和田信雄, NOPTREX collaboration

日本物理学会講演概要集 75.2 巻 ( 0 ) 頁： 316 - 316 2020年

中性子干渉性散乱を用いた未知短距離力探索実験における検出器の性能解析 Open Access

中部倫太郎, 清水裕彦, 広田克也, 北口雅暁, 近藤亮太, 嶋達志, 原周平, 廣本政之, 猪野隆, 三島賢二, 吉岡瑞樹

日本物理学会講演概要集 75.2 巻 ( 0 ) 頁： 302 - 302 2020年

中性子干渉性散乱による未知短距離力探索実験に向けたナノ粒子標的のデータ解析 Open Access

廣本政之, 中部倫太郎, 近藤亮太, 広田克也, 猪野隆, 北口雅暁, 三島賢二, 嶋達志, 清水裕彦, 吉岡瑞樹

日本物理学会講演概要集 75.2 巻 ( 0 ) 頁： 301 - 301 2020年

中性子回折を用いた未知相互作用の探索について Open Access

藤家拓大, 清水裕彦, 北口雅暁, 広田克也, 山形豊, 細畠拓也, 竹田真宏

日本物理学会講演概要集 75.2 巻 ( 0 ) 頁： 144 - 144 2020年

中性子EDM探索実験のための結晶内電場によるスピン回転の測定 Open Access

伊藤茂康, 福村省三, 菱田真由, 北口雅暁, 清水裕彦

日本物理学会講演概要集 75.2 巻 ( 0 ) 頁： 278 - 278 2020年

周期的ポテンシャルによる中性子散乱を用いた未知相互作用探索計画 Open Access

近藤亮太, 廣本政之, 嶋達志, 広田克也, 中部倫太郎, 清水裕彦, 北口雅暁, 猪野隆, 三島賢二, 吉岡瑞樹

日本物理学会講演概要集 75.2 巻 ( 0 ) 頁： 300 - 300 2020年

結晶回折を用いた中性子EDM測定のための結晶内電場測定 Open Access

菱田真由, 伊藤茂, 福村省三, 北口雅暁, 清水裕彦

日本物理学会講演概要集 75.2 巻 ( 0 ) 頁： 279 - 279 2020年

Measurement of the total neutron-scattering cross-section ratios of noble gases of natural isotopic composition using a pulsed neutron beam Open Access

Haddock C.C., Hiromoto M., Hirota K., Ino T., Kitaguchi M., Mishima K., Oi N., Shima T., Shimizu H.M., Snow W.M., Yoshioka T.

Physical Review C 100 巻 ( 6 ) 2019年12月

記述言語：日本語出版者・発行元：Physical Review C

Precision measurements of slow neutron cross sections with atoms have several scientific applications. In particular, the n-He4 s-wave scattering length is important to know both for helping to constrain the nuclear three-body interaction and for the proper interpretation of several ongoing slow neutron experiments searching for other types of neutron-atom interactions. We present new measurements of the ratios of the neutron differential scattering cross sections of the noble gases He, Ar, Kr, and Xe to Ne. All gases used were of natural isotopic abundance. These measurements were performed using a recently developed neutron-scattering apparatus for gas samples located on a pulsed slow neutron beamline which was designed to search for possible exotic neutron-atom interactions and employs both neutron time of flight information and a position-sensitive neutron detector for scattering event reconstruction. We found agreement with the literature values of scattering cross sections inferred from Ar/Ne, Kr/Ne, and Xe/Ne differential cross-section ratios over the q range of 1-7 nm-1. However, for the case of He/Ne we find that the cross section inferred differs by 11.3% (7.6σ) from previously reported values inferred from neutron phase-shift measurements, but is in reasonable agreement with values from other measurements. The very large discrepancy in the He/Ne ratio calls for a new precision measurement of the n-He4 scattering length using neutron interferometry.

DOI： 10.1103/PhysRevC.100.064002

中性子ビームの速度均等化による高密度超冷中性子生成 Open Access

北口雅暁, 清水裕彦, 岩下芳久

加速器 16 巻 ( 3 ) 頁： 161 - 166 2019年10月

Improved accuracy in the determination of the thermal cross section of 14N(n, p) 14C for neutron lifetime measurement Open Access

Kitahara R., Hirota K., Ieki S., Ino T., Iwashita Y., Kitaguchi M., Koga J., Mishima K., Morishita A., Nagakura N., Oide H., Otono H., Seki Y., Sekiba D., Shima T., Shimizu H.M., Sumi N., Sumino H., Taketani K., Tomita T., Yamada T., Yamashita S., Yokohashi M., Yoshioka T.

Progress of Theoretical and Experimental Physics 2019 巻 ( 9 ) 2019年9月

記述言語：日本語出版者・発行元：Progress of Theoretical and Experimental Physics

In a neutron lifetime measurement at the Japan Proton Accelerator Complex, the neutron lifetime is calculated from the neutron decay rate and the incident neutron flux. The flux is obtained by counting the protons emitted from the neutron absorption reaction of <sup>3</sup>He gas, which is diluted in a mixture of working gas in a detector. Hence, it is crucial to determine the amount of <sup>3</sup>He in the mixture. In order to improve the accuracy of the number density of the <sup>3</sup>He nuclei, we have suggested using the <sup>14</sup>N(n, p)<sup>14</sup>C reaction as a reference because this reaction involves similar kinetic energy to the <sup>3</sup>He(n,p)<sup>3</sup> H reaction and a smaller reaction cross section to introduce reasonable large partial pressure. The uncertainty of the recommended value of the cross section, however, is not satisfied with our requirement. In this paper we report the most accurate experimental value of the cross section of the <sup>14</sup>N(n,p)<sup>14</sup>C reaction at a neutron velocity of 2200 m s<sup>-1</sup>, measured relative to the <sup>3</sup>He(n,p)<sup>3</sup>H reaction. The result was 1.868 \pm 0.003 (stat.) ± 0.006 (sys.) b. Additionally, the cross section of the <sup>17</sup>O(n,α)<sup>14</sup>C reaction at the neutron velocity is also redetermined as 249 ± 6 mb.

DOI： 10.1093/ptep/ptz096

Ultra-violet imaging of the night-time earth by EUSO-Balloon towards space-based ultra-high energy cosmic ray observations Open Access

Abdellaoui G., Abe S., Adams J.H., Ahriche A., Allard D., Allen L., Alonso G., Anchordoqui L., Anzalone A., Arai Y., Asano K., Attallah R., Attoui H., Ave Pernas M., Bacholle S., Bakiri M., Baragatti P., Barrillon P., Bartocci S., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A., Belov K., Benmessai K., Bertaina M., Biermann P.L., Biktemerova S., Bisconti F., Blanc N., Błȩcki J., Blin-Bondil S., Bobik P., Bogomilov M., Bozzo E., Briz S., Bruno A., Caballero K.S., Cafagna F., Campana D., Capdevielle J.N., Capel F., Caramete A., Caramete L., Carlson P., Caruso R., Casolino M., Cassardo C., Castellina A., Catalano C., Catalano O., Cellino A., Chikawa M., Chiritoi G., Christl M.J., Connaughton V., Conti L., Cordero G., Cotto G., Crawford H.J., Cremonini R., Csorna S., Cummings A., Dagoret-Campagne S., de Castro A.J., De Donato C., de la Taille C., De Santis C., del Peral L., Di Martino M., Diaz Damian A., Djemil T., Dutan I., Ebersoldt A., Ebisuzaki T., Engel R., Eser J., Fenu F., Fernández-González S., Ferrarese S., Flamini M., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T., Fujimoto J., Fukushima M., Galeotti P., García-Ortega E., Garipov G., Gascón E., Genci J., Giraudo G., González Alvarado C., Gorodetzky P., Greg R.

Astroparticle Physics 111 巻頁： 54 - 71 2019年9月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Astroparticle Physics

The JEM-EUSO (Joint Experiment Missions for the Extreme Universe Space Observatory) program aims at developing Ultra-Violet (UV) fluorescence telescopes for efficient detections of Extensive Air Showers (EASs) induced by Ultra-High Energy Cosmic Rays (UHECRs) from satellite orbit. In order to demonstrate key technologies for JEM-EUSO, we constructed the EUSO-Balloon instrument that consists of a ∼1 m <sup>2</sup> refractive telescope with two Fresnel lenses and an array of multi-anode photo-multiplier tubes at the focus. Distinguishing it from the former balloon-borne experiments, EUSO-Balloon has the capabilities of single photon counting with a gate time of 2.3 µs and of imaging with a total of 2304 pixels. As a pathfinder mission, the instrument was launched for an 8 h stratospheric flight on a moonless night in August 2014 over Timmins, Canada. In this work, we analyze the count rates over ∼2.5 h intervals. The measurements are of diffuse light, e.g. of airglow emission, back-scattered from the Earth's atmosphere as well as artificial light sources. Count rates from such diffuse light are a background for EAS detections in future missions and relevant factor for the analysis of EAS events. We also obtain the geographical distribution of the count rates over a ∼780 km <sup>2</sup> area along the balloon trajectory. In developed areas, light sources such as the airport, mines, and factories are clearly identified. This demonstrates the correct location of signals that will be required for the EAS analysis in future missions. Although a precise determination of count rates is relevant for the existing instruments, the absolute intensity of diffuse light is deduced for the limited conditions by assuming spectra models and considering simulations of the instrument response. Based on the study of diffuse light by EUSO-Balloon, we also discuss the implications for coming pathfinders and future space-based UHECR observation missions.

DOI： 10.1016/j.astropartphys.2018.10.008

Generation of 4 He 2∗ Clusters via Neutron- 3 He Absorption Reaction Toward Visualization of Full Velocity Field in Quantum Turbulence

Matsushita T., Sonnenschein V., Guo W., Hayashida H., Hiroi K., Hirota K., Iguchi T., Ito D., Kitaguchi M., Kiyanagi Y., Kokuryu S., Kubo W., Saito Y., Shimizu H.M., Shinohara T., Suzuki S., Tomita H., Tsuji Y., Wada N.

Journal of Low Temperature Physics 196 巻 ( 1-2 ) 頁： 275 - 282 2019年7月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Low Temperature Physics

For flow visualization study of quantum turbulence in superfluid <sup>4</sup>He, He2∗ excimers are unique tracers which follow only normal-fluid component flow above 1 K. To generate detectable small He2∗ clouds (clusters) required for full-space velocity field measurements, we have adopted a new method based on neutron absorption reaction of <sup>3</sup>He impurities in <sup>4</sup>He and conducted proof-of-principle experiments. Generation of the He2∗ excimers was detected by laser-induced fluorescence using photomultiplier tubes. The fluorescence was observed to increase proportionally to the neutron flux, suggesting that a sufficient amount of He2∗ excimers were generated by neutrons. We also estimated the number of He2∗ excimers possibly generated by γ-rays and found that the relevant contribution was less than 40%. Thus, the majority of the He2∗ excimers was confirmed to be generated via n-<sup>3</sup>He absorption reactions.

DOI： 10.1007/s10909-018-02112-3

First ultracold neutrons produced at TRIUMF Open Access

Ahmed S., Altiere E., Andalib T., Bell B., Bidinosti C.P., Cudmore E., Das M., Davis C.A., Franke B., Gericke M., Giampa P., Gnyp P., Hansen-Romu S., Hatanaka K., Hayamizu T., Jamieson B., Jones D., Kawasaki S., Kikawa T., Kitaguchi M., Klassen W., Konaka A., Korkmaz E., Kuchler F., Lang M., Lee L., Lindner T., Madison K.W., Makida Y., Mammei J., Mammei R., Martin J.W., Matsumiya R., Miller E., Mishima K., Momose T., Okamura T., Page S., Picker R., Pierre E., Ramsay W.D., Rebenitsch L., Rehm F., Schreyer W., Shimizu H.M., Sidhu S., Sikora A., Smith J., Tanihata I., Thorsteinson B., Vanbergen S., Van Oers W.T.H., Watanabe Y.X.

Physical Review C 99 巻 ( 2 ) 2019年2月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Physical Review C

We installed a source for ultracold neutrons at a new, dedicated spallation target at TRIUMF. The source was originally developed in Japan and uses a superfluid-helium converter cooled to 0.9K. During an extensive test campaign in November 2017, we extracted up to 325000 ultracold neutrons after a one-minute irradiation of the target, over three times more than previously achieved with this source. The corresponding ultracold-neutron density in the whole production and guide volume is 5.3cm-3. The storage lifetime of ultracold neutrons in the source was initially 37 s and dropped to 24 s during the 18 days of operation. During continuous irradiation of the spallation target, we were able to detect a sustained ultracold-neutron rate of up to 1500s-1. Simulations of UCN production, UCN transport, temperature-dependent UCN yield, and temperature-dependent storage lifetime show excellent agreement with the experimental data and confirm that the ultracold-neutron-upscattering rate in superfluid helium is proportional to T7.

DOI： 10.1103/PhysRevC.99.025503

Corrigendum to “Pendellösung interferometry by using pulsed neutrons” (Nuclear Inst. and Methods in Physics Research, A (2018) 908 (78–81), (S0168900218309963) (10.1016/j.nima.2018.08.043)) Open Access

Itoh S., Nakaji M., Uchida Y., Kitaguchi M., Shimizu H.

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 918 巻頁： 99 - 99 2019年2月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

Miller indices that the Pendellösung fringes were observed was not [Formula presented], but [Formula presented]. Therefore the description of [Formula presented] should be replaced to [Formula presented] for all in the statement and figures. In connection with this, the sentences from second line to fifth line in section 3 of 80 page should be renewed as follows. “Four diffraction peaks were observed for the [Formula presented], [Formula presented], [Formula presented], [Formula presented] planes. The diffraction peak of the [Formula presented] plane, which was in the Laue geometry condition, was analyzed for the demonstration of the Pendellösung fringes”. And Fig. 4 is replaced. The conclusion of this article is not affected due to these corrections.

DOI： 10.1016/j.nima.2018.10.218

今後の展望２

清水裕彦

波紋 29 巻 ( 1 ) 頁： 41 - 43 2019年2月

記述言語：日本語出版者・発行元：日本中性子科学会

<p>Analytic framework to quantitatively evaluate the performance of existing neutron scattering instruments would be valuable to find out new possibilities and potentials of slow neutron beams. A conceptual introduction of ongoing exploration for building up a framework is discussed.</p>

DOI： 10.5611/hamon.29.1_41

Verification of the compound nuclear model for T-violation search Open Access

Yamamoto T., Shimizu H.M., Ishizaki K., Niinomi Y., Kitaguchi M., Takada S., Koga J., Makise S., Yoshioka T., Kimura A., Sakai K., Oku T., Okudaira T., Endo S., Tani Y., Fujioka H., Yoshikawa H., Hirota K., Shima T.

Proceedings of Science 356 巻 2019年

記述言語：日本語出版者・発行元：Proceedings of Science

Large sources of parity violation have been observed in compound nuclear reactions. These enhancements are described by the compound nuclear model, which can be used to describe the angular correlation of γ-rays produced in (n; γ) reactions in medium-heavy nuclei. It has also been suggested that these same reactions could lead to a similar enhancement in time reversal violating processes. Therefore, we are interested in verifying the compound nuclear model by studying the (n; γ) reaction using polarized neutrons. In this paper, we discuss the installation and characterization of a neutron polarizer used in the (n; γ) measurement with transversely polarized neutrons.

DOI： 10.22323/1.356.0042

Polarized lanthanum target for the t-violation search in slow neutron transmission Open Access

Ishizaki K., Shimizu H.M., Kitaguchi M., Matsushita T., Iinuma M., Kohri H., Yoshikawa H., Yosoi M., Shima T., Iwata T., Miyachi Y., Ishimoto S., Fujita M., Ikeda Y.

Proceedings of Science 379 巻 2019年

記述言語：日本語出版者・発行元：Proceedings of Science

The Nd<sup>3+</sup> doped LaAlO<inf>3</inf> crystal is a good candidate of a polarized <sup>139</sup>La target for the search of the P-odd and T-odd interaction in the low-energy neutron absorption of <sup>139</sup>La. As the first step for realizing the polarized <sup>139</sup>La target, we grow the undoped LaAlO<inf>3</inf> crystal and the La<inf>1−x</inf>Nd<inf>x</inf>AlO<inf>3</inf> (x = 5 ×10<sup>−</sup><sup>4</sup>) crystal by floating-zone method with four halogen lamps. The ESR measurements of Nd<sup>3+</sup> in the latter crystal indicated that the linewidth was about 6 gauss, whose value is the same as the crystal in which 50 % <sup>139</sup>La polarization was achieved in the previous DNP experiment. As the result, the crystals grown by this method can be applicable to the target study for the T-violation search.

DOI： 10.22323/1.379.0061

Development of the neutron polarizer for the T-violation search using compound nuclei Open Access

Okudaira T., Oku T., Sakai K., Ino T., Hayashida H., Hiroi K., Shinohara T., Kakurai K., Aizawa K., Shimizu H.M., Kitaguchi M., Yamamoto T.

Proceedings of Science 356 巻 2019年

記述言語：日本語出版者・発行元：Proceedings of Science

The fundamental parity violation is enhanced by 10<sup>6</sup> times at maximum in several neutron induced compound nuclei. There is a theoretical prediction that fundamental T-violating effects can be also largely enhanced in compound nuclei implying that T-violation can be searched for by making very sensitive measurements. A T-violation search experiment using compound nuclei is planned at J-PARC. Polarized epithermal neutron beam, polarized nuclear target, and high count rate neutron detector are necessary for the experiment, and therefore a development of the neutron polarizer using polarized <sup>3</sup>He is ongoing at J-PARC in JAEA. Recently, a clean vacuum system to fabricate <sup>3</sup>He spin filters was constructed, and several <sup>3</sup>He spin filters were fabricated. The current status of the development of the <sup>3</sup>He spin filter was reported.

DOI： 10.22323/1.356.0029

J-PARC/BL05における中性子−希ガス散乱を用いた未知相互作用探索実験−2018データ解析− Open Access

廣本政之, 嶋達志, 清水裕彦, 広田克也, 北口雅暁, 吉岡瑞樹, 三島賢二, 猪野隆

日本物理学会講演概要集 74.1 巻 ( 0 ) 頁： 306 - 306 2019年

超冷中性子リバンチャー2号機の性能評価実験結果 Open Access

今城想平, 岩下芳久, 三島賢二, 北口雅暁, 清水裕彦, 猪野隆, 山下了, 広田克也, 後藤文也, 不破康裕, 片山領

日本物理学会講演概要集 74.2 巻 ( 0 ) 頁： 93 - 93 2019年

複合核共鳴を用いた時間反転対称性の破れの探索実験のための偏極核標的開発 Open Access

飯沼昌隆, 清水裕彦, 池上弘樹, 池田陽一, 石崎貢平, 石黒亮輔, 石元茂, 猪野隆, 岩田高広, 上坂友洋, 大友季哉, 奥隆之, 神田浩樹, 北口雅暁, 郡英樹, 嶋達志, 高橋大輔, 高橋義朗, 藤田全基, 松下琢, 宮地義之, 與曽井優, 和田信雄, 他 NOPTREX collaboration

日本物理学会講演概要集 74.1 巻 ( 0 ) 頁： 277 - 277 2019年

結晶回折を用いた中性子EDM測定のための結晶内電場の測定2 Open Access

内田裕也, 伊藤茂康, 福村省三, 山本奈々, 北口雅暁, 清水裕彦

日本物理学会講演概要集 74.1 巻 ( 0 ) 頁： 298 - 298 2019年

結晶回折を用いた中性子EDM測定のための、結晶の評価 Open Access

菱田真由, 伊藤茂康, 福村省三, 北口雅暁, 清水裕彦

日本物理学会講演概要集 74.2 巻 ( 0 ) 頁： 267 - 267 2019年

結晶回折を用いた中性子EDM測定のための、X線による結晶の評価 Open Access

福村省三, 伊藤茂康, 内田裕也, 山本奈々, 北口雅暁, 清水裕彦

日本物理学会講演概要集 74.1 巻 ( 0 ) 頁： 299 - 299 2019年

名古屋大学加速器駆動中性子源 NUANS におけるイメージングポートの構築 Open Access

粟野章吾, 市川豪, 今城想平, 岩下芳久, 瓜谷章, 北口雅暁, 鬼柳善明, 清水裕彦, 土川雄介, 土田一輝, 釣田幸雄, 広田克也, 三和田靖彦, 山形豊, 山崎淳, 吉橋幸子, 渡辺賢一

日本物理学会講演概要集 74.1 巻 ( 0 ) 頁： 416 - 416 2019年

低エネルギー中性子照射ターゲットとしての<sup>139</sup>Laの核偏極標的開発 Open Access

石崎貢平, 清水裕彦, 北口雅暁, 松下琢, 飯沼昌隆, 藤田全基, 池田陽一, 郡英輝, 池上弘樹, 石黒亮輔, 石元茂, 猪野隆, 岩田高広, 上坂友洋, 大友季哉, 奥隆之, 神田浩樹, 嶋達志, 高橋大輔, 高橋義朗, 宮地義之, 與曽井優, 和田信雄, 他NOPTREX collaboration

日本物理学会講演概要集 74.2 巻 ( 0 ) 頁： 299 - 299 2019年

中性子－反中性子振動探索実験のための高分解能飛跡検出器の開発 Open Access

久村さら, 北口雅暁, 清水裕彦

日本物理学会講演概要集 74.2 巻 ( 0 ) 頁： 323 - 323 2019年

中性子干渉性散乱による未知短距離力探索に向けた原理実証実験 Open Access

廣本政之, 堀太地, 大井法子, 広田克也, 猪野隆, 北口雅暁, 三島賢二, 嶋達志, 清水裕彦, 原周平, 吉岡瑞樹

日本物理学会講演概要集 74.2 巻 ( 0 ) 頁： 269 - 269 2019年

中性子回折を用いた未知相互作用の探索について Open Access

藤家拓大, 清水裕彦, 北口雅暁, 山形豊, 細畠拓也, 竹田真宏

日本物理学会講演概要集 74.2 巻 ( 0 ) 頁： 95 - 95 2019年

中性子回折を用いた未知相互作用の探索について Open Access

藤家拓大, 清水裕彦, 北口雅暁, 山形豊, 細畠拓也, 竹田真宏

日本物理学会講演概要集 74.1 巻 ( 0 ) 頁： 162 - 162 2019年

パルス中性子対応干渉計の開発 Open Access

山本奈々, 北口雅暁, 清水裕彦, 関義親, 三島賢二

日本物理学会講演概要集 74.2 巻 ( 0 ) 頁： 265 - 265 2019年

SiO<sub>2</sub>結晶内電場測定と中性子EDM測定に向けて Open Access

伊藤茂康, 菱田真由, 福村省三, 北口雅暁, 清水裕彦

日本物理学会講演概要集 74.2 巻 ( 0 ) 頁： 266 - 266 2019年

MTV実験の報告2 Open Access

尾崎早智, 梶原拓真, 川村広和, 北口雅暁, 後藤文也, 坂元祐子, 清水裕彦, 清水裕太, 竹中黎, 田中佐季, 田沼良介, 田村晃太郞, 戸塚祐実, 中谷祐輔, 馬場秀忠, 益田英知, 山脇友志, 横橋麻美, 吉田立, 渡辺悦子, 村田次郎

日本物理学会講演概要集 74.1 巻 ( 0 ) 頁： 304 - 304 2019年

MTV実験に関する報告1 Open Access

後藤文也, 尾崎早智, 梶原拓真, 川村広和, 北口雅暁, 坂元祐子, 清水裕彦, 清水裕太, 竹中黎, 田中佐季, 田村晃太郞, 戸塚祐実, 中谷祐輔, 馬場秀忠, 益田英知, 村田次郎, 山脇友志, 横橋麻美, 渡辺悦子

日本物理学会講演概要集 74.1 巻 ( 0 ) 頁： 303 - 303 2019年

J-PARC/BL05における中性子寿命測定実験：SFCアップグレード Open Access

岡部宏紀, 日野正裕, 広田克也, 家城斉, 猪野隆, 岩下芳久, 北口雅暁, 北原龍之介, 古賀淳, 三島賢二, 森下彩, 中野祐輔, 長倉直樹, 小田達郎, 生出秀行, 音野瑛俊, 関義親, 関場大一郎, 嶋達志, 清水裕彦, 角直幸, 角野浩史, 竹谷薫, 富田龍彦, 上原英晃, 山田崇人, 山下了, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 74.2 巻 ( 0 ) 頁： 94 - 94 2019年

J-PARC/BL05における中性子寿命測定実験：SFCアップグレード Open Access

岡部宏紀, 広田克也, 家城斉, 猪野隆, 岩下芳久, 北口雅暁, 北原龍之介, 古賀淳, 三島賢二, 森下彩, 中野祐輔, 長倉直樹, 生出秀行, 音野瑛俊, 関義親, 関場大一郎, 嶋達志, 清水裕彦, 角直幸, 角野浩史, 竹谷薫, 富田龍彦, 上原英晃, 山田崇人, 山下了, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 74.1 巻 ( 0 ) 頁： 163 - 163 2019年

A cold/ultracold neutron detector using fine-grained nuclear emulsion with spatial resolution less than 100 nm Open Access

Naganawa, N; Ariga, T; Awano, S; Hino, M; Hirota, K; Kawahara, H; Kitaguchi, M; Mishima, K; Shimizu, HM; Tada, S; Tasaki, S; Umemoto, A

EUROPEAN PHYSICAL JOURNAL C 78 巻 ( 11 ) 2018年11月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：European Physical Journal C

A new type of cold/ultracold neutron detector that can realize a spatial resolution of less than 100 nm was developed using nuclear emulsion. The detector consists of a fine-grained nuclear emulsion coating and a 50-nm thick <sup>10</sup>B <inf>4</inf>C layer for the neutron conversion. The detector was exposed to cold and ultracold neutrons (UCNs) at the J-PARC. Detection efficiencies were measured as (0.163 ± 0.015 (stat) ± 0.013 (sys))% and (10.3 ± 1.3 (stat) ± 1.1 (sys))% for cold and ultracold neutrons consistently with the <sup>10</sup>B content in the converter. Positions of individual neutrons can be determined by observing secondary particle tracks recorded in the nuclear emulsion. The spatial resolution of incident neutrons were found to be in the range of 11–99 nm in the angle region of tanθ≤ 1.9 , where θ is the angle between a recorded track and the normal direction of the converter layer. The achieved spatial resolution corresponds to the improvement of one or two orders of magnitude compared with conventional techniques and it is comparable with the wavelength of UCNs.

DOI： 10.1140/epjc/s10052-018-6395-7

Pendellösung interferometry by using pulsed neutrons 査読有り Open Access

Itoh S., Nakaji M., Uchida Y., Kitaguchi M., Shimizu H.M.

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 908 巻頁： 78 - 81 2018年11月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

Pendellösung interferometry is one of the technique for accurate determination of the structure factors of crystals. Observation method of Pendellösung fringes by using pulsed cold neutrons and the time-of-flight analysis were established. We measured the nuclear scattering length of silicon by the Pendellösung fringes with pulsed neutrons as (4.125±0.003(stat.)±0.028(syst.)). This indicates the applicability of Pendellösung interferometry at high-intensity pulsed neutron facilities for various precision measurements.

DOI： 10.1016/j.nima.2018.08.043

The general relativistic effects on the magnetic moment in Earth's gravity (vol 2018, 063B07, 2018) 査読有り Open Access

Morishima, T; Futamase, T; Shimizu, HM

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS 2018 巻 ( 8 ) 2018年8月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Progress of Theoretical and Experimental Physics

The authors originally denoted the muon g-factor as gμ, whichwas mistyped as "gμ" in the published manuscript during the editing process. Equation (59) should be corrected as (Formula Presented).. The publisher apologises for any inconvenience caused.

DOI： 10.1093/ptep/pty085

中小型加速器中性子源の構築のための日本加速器学会と日本中性子科学会の連携に関して Open Access

広田克也, 清水裕彦, 岩下芳久, 内藤富士雄

加速器 15 巻 ( 2 ) 頁： 69 - 72 2018年7月

The general relativistic effects on the magnetic moment in Earth's gravity 査読有り Open Access

Morishima T., Futamase T., Shimizu H.M.

Progress of Theoretical and Experimental Physics 2018 巻 ( 6 ) 2018年6月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Progress of Theoretical and Experimental Physics

The magnetic moment of free fermions in the Earth's gravitational field has been studied on the basis of general relativity. Adopting the Schwarzschild metric for the background spacetime, the dipole coupling between the magnetic moment and the magnetic field has been found to be dependent on the gravity in the calculation up to the post-Newtonian order O(1/c<sup>2</sup>). The gravity dependence can be formulated by employing the effective value of the magnetic moment as a gravity-dependent quantity μ <sup>eff</sup> <inf>m</inf> = (1 + 3φ/c<sup>2</sup>) μ<inf>m</inf> for the cases of minimal coupling, non-minimal coupling, and a mixture of the two. The gravitationally induced anomaly is found to be canceled in the experimental values of the anomalous magnetic moment measured in the Penning trap and storage ring methods.

DOI： 10.1093/ptep/pty066

複合核状態を用いた時間反転対称性の破れ探索計画 Open Access

山本知樹, 清水裕彦, 北口雅暁, 広田克也, 石崎貢平, 遠藤駿典, 佐藤匠, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 木村敦, 奥平琢也, 奥隆之, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 73.2 巻 ( 0 ) 頁： 67 - 67 2018年

中性子2次元シンチレーション検出器の評価測定 Open Access

赤木佑, 清水裕彦, 北口雅暁, 広田克也, 岡部宏紀, 新實裕大, 福村省三

日本物理学会講演概要集 73.1 巻 ( 0 ) 頁： 345 - 345 2018年

中性子寿命測定のための光学系アップグレード Open Access

岡部宏紀, 中野祐輔, 富田龍彦, 上原英晃, 古賀淳, 角直幸, 音野瑛俊, 吉岡瑞樹, 山下了, 家城斉, 長倉直樹, 山田崇人, 角野浩史, 清水裕彦, 広田克也, 北口雅暁, 岩下芳久, 北原龍之介, 嶋達志, 関場大一郎, 關義親, 生出秀行, 猪野隆, 竹谷薫, 三島賢二

日本物理学会講演概要集 73.1 巻 ( 0 ) 頁： 346 - 346 2018年

学術分野における中性子利用 Open Access

清水裕彦, 早川岳人, 福嶋喜章

レーザー研究 46 巻 ( 11 ) 頁： 647 2018年

時間反転対称性の破れ探索のための中性子偏極フィルターの開発 Open Access

佐藤匠, 清水裕彦, 北口雅暁, 広田克也, 石崎貢平, 遠藤駿典, 山本知樹, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 木村敦, 奥平琢也, 奥隆之, 日野正裕, 嶋達志, 山形豊, 服部峰之

日本物理学会講演概要集 73.2 巻 ( 0 ) 頁： 69 - 69 2018年

結晶回折を用いた中性子EDM探索のための動力学的回折効果の検証 Open Access

中路雅也, 伊藤茂康, 内田裕也, 北口雅暁, 清水裕彦

日本物理学会講演概要集 73.1 巻 ( 0 ) 頁： 388 - 388 2018年

結晶回折を用いた中性子EDM探索のための結晶内電場の測定 Open Access

内田裕也, 伊藤茂康, 福村省三, 山本奈々, 北口雅暁, 清水裕彦

日本物理学会講演概要集 73.2 巻 ( 0 ) 頁： 124 - 124 2018年

結晶回折を用いた中性子EDM探索のための結晶内電場の測定に向けて Open Access

内田裕也, 伊藤茂康, 中路雅也, 北口雅暁, 清水裕彦

日本物理学会講演概要集 73.1 巻 ( 0 ) 頁： 389 - 389 2018年

複合核共鳴における時間反転対称性の破れ探索実験のためのTriplet-DNPを用いた中性子スピンフィルターの開発 Open Access

高田秀佐, 古賀淳, 吉岡瑞樹, 上坂友洋, 立石健一郎, 大竹淑恵, 池田義雅, 若林泰生, 清水裕彦, 広田克也, 奥平琢也, 大井法子, 伊藤維久弥, 山本知樹, 石崎貢平, 遠藤駿典, 佐藤匠, 北口雅暁, 酒井健二

日本物理学会講演概要集 73.1 巻 ( 0 ) 頁： 404 - 404 2018年

複合核共鳴を用いた時間反転対称性破れ探索に向けた、<sup>81</sup>Br(n,γ)反応におけるγ線放出角度分布測定 Open Access

遠藤駿典, 清水裕彦, 北口雅暁, 広田克也, 山本知樹, 石崎貢平, 佐藤匠, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 木村敦, 奥平琢也, 奥隆之, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 73.2 巻 ( 0 ) 頁： 68 - 68 2018年

複合核状態を用いた時間反転対称性の破れ探索に向けた偏極標的開発 Open Access

石崎貢平, 清水裕彦, 北口雅暁, 広田克也, 山本知樹, 遠藤駿典, 佐藤匠, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 木村敦, 奥平琢也, 奥隆之, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 73.2 巻 ( 0 ) 頁： 70 - 70 2018年

MTV Run-2017の報告 Open Access

後藤文也, 尾崎早智, 梶原拓真, 川村広和, 北口雅暁, 坂元祐子, 清水裕彦, 清水裕太, 竹中黎, 田中佐季, 田村晃太郎, 戸塚祐実, 中谷祐輔, 馬場秀忠, 益田英知, 村田次郎, 山脇友志, 横橋麻美, 渡辺悦子

日本物理学会講演概要集 73.1 巻 ( 0 ) 頁： 401 - 401 2018年

J-PARC/BL05における中性子寿命測定実験：低ガス圧運転での取得データの解析 Open Access

富田龍彦, 上原英晃, 古賀淳, 角直幸, 音野瑛俊, 吉岡瑞樹, 山下了, 家城斉, 長倉直樹, 山田崇人, 角野浩史, 清水裕彦, 広田克也, 北口雅暁, 岩下芳久, 北原龍之介, 嶋達志, 関場大一郎, 關義親, 生出秀行, 猪野隆, 竹谷薫, 三島賢二

日本物理学会講演概要集 73.1 巻 ( 0 ) 頁： 114 - 114 2018年

J-PARC/BL05における中性子寿命測定実験：実験の現状(2018) Open Access

三島賢二, 広田克也, 家城斉, 猪野隆, 岩下芳久, 北口雅暁, 北原龍之介, 古賀淳, 森下彩, 長倉直樹, 中野祐輔, 生出秀行, 岡部宏紀, 音野瑛俊, 関義親, 関場大一郎, 嶋達志, 清水裕彦, 角直幸, 角野浩史, 竹谷薫, 富田龍彦, 上原英晃, 山田崇人, 山下了, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 73.2 巻 ( 0 ) 頁： 72 - 72 2018年

J-PARC/BL05における中性子寿命測定実験：高精度化に向けたアップグレード Open Access

上原英晃, 角直幸, 富田龍彦, 音野瑛俊, 吉岡瑞樹, 山下了, 長倉直樹, 清水裕彦, 広田克也, 中野祐輔, 岡部宏紀, 北口雅暁, 岩下芳久, 關義親, 生出秀行, 猪野隆, 竹谷薫, 三島賢二

日本物理学会講演概要集 73.2 巻 ( 0 ) 頁： 73 - 73 2018年

レーザー駆動中性子源モデレータの概念と中性子光学 Open Access

池田裕二郎, 清水裕彦

レーザー研究 46 巻 ( 11 ) 頁： 641 2018年

加速器駆動コンパクト中性子源の産業・医療への利用 Open Access

福嶋喜章, 熊田博明, 佐藤馨, 田中浩基, 清水裕彦

レーザー研究 46 巻 ( 11 ) 頁： 659 2018年

小型パルス中性子源のための中性子計測法の最近の進展 Open Access

有川安信, 池田裕二郎, 清水裕彦, 花山良平, 近藤治靖, 黒澤俊介

レーザー研究 46 巻 ( 11 ) 頁： 634 2018年

The International Conference on Neutron Optics (NOP2017) in Nara

Kiyanagi Y., Kakurai K., Shimizu H., Kitaguchi M., Oku T.

Neutron News 28 巻 ( 4 ) 頁： 18 - 20 2017年10月

Concentration of the velocity distribution of pulsed neutron beams 査読有り Open Access

Kitaguchi M., Iwashita Y., Shimizu H.

Progress of Theoretical and Experimental Physics 2017 巻 ( 4 ) 2017年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Progress of Theoretical and Experimental Physics

The velocity of neutrons from a pulsed neutron source is well defined as a function of their arrival time. An electro-magnetic neutron accelerator/decelerator synchronized with the neutron timeof-flight is capable of selectively changing the neutron velocity and concentrating the velocity distribution. The possible enhancement of the neutron intensity at a specific neutron velocity by orders of magnitude is discussed, together with an experimental design.

DOI： 10.1093/ptep/ptx029

複合核状態における時間反転対称性の破れ－時間反転対称性の破れ測定のための高計数率検出器の開発 Open Access

遠藤駿典, 清水裕彦, 北口雅暁, 広田克也, 奥平琢也, 大井法子, 伊藤維久弥, 山本知樹, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 奥隆之, 木村敦, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 259 - 259 2017年

The design of the beam line of the Nagoya University accelerator-driven neutron source Open Access

Ito I., Furusawa D., Hirota K., Ichikawa G., Iwashita Y., Kitaguchi M., Kiyanagi Y., Menjo Y., Miwata Y., Shimizu H.M., Tsuchida K., Tsuchikawa Y., Tsurita Y., Uritani A., Watanabe K., Yamagata Y., Yamazaki A., Yoshihashi S.

Proceedings of Science 2017-January 巻 2017年

出版者・発行元：Proceedings of Science

The Nagoya University Accelerator driven Neutron Source (NUANS) are now constructing at main campus of Nagoya University. The electrostatic accelerator is used with the maximum proton energy and power of 2.8MeV, 15mA(42kW) respectively. Two neutron beam lines are planned at NUANS. The first beam line is dedicated to BNCT. The second beam line is designed for research and development of neutron devices and neutron imaging. The neutrons used for the 2nd beam line are generated by using the (p, n) reaction of beryllium. We designed a compact target station for the 2nd beam line with the dimension of 90cm×90cm×95cm by using radiation shielding simulation. We considered neutron beam extraction with the cross section of 10cm×10cm for radiography at the 2nd beam line. The neutron flux is expected to be about 104n cm<sup>-2</sup>s<sup>-1</sup> with the energy less than 0.1 eV at the position of 2m from the neutron source. We also calculated the proton beam transport from the exit of the accelerator to the neutron production target of the 2nd beam line.

DOI： 10.22323/1.294.0068

中性子EDM測定のためのBi<sub>12</sub>GeO<sub>20</sub>結晶内電場の測定(II) Open Access

伊藤茂康, 中路雅也, 北口雅暁, 清水裕彦

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 269 - 269 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子EDMの存在は時間反転対称性を破る。我々は結晶内の強い電場を利用した中性子EDM測定実験を進めている。その第一ステップとしてBi_12_GeO_20_結晶内電場の測定に取り組んでいる。先回の報告では、ペンデル干渉縞のコントラスト低及び統計少が主因となり結晶内電場の測定に至らなかった。これらの課題解決に取り組み、新たな実験を行ったのでその結果を報告する。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_269

中性子EDM測定のためのBi<sub>12</sub>GeO<sub>20</sub>結晶内電場の測定(III) Open Access

伊藤茂康, 中路雅也, 内田裕也, 北口雅暁, 清水裕彦

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 282 - 282 2017年

名古屋大学加速器駆動小型中性子源 NUANS 2nd ビームラインの建設 Open Access

土川雄介, 阿保圭祐, 市川豪, 伊藤維久弥, 今城想平, 岩下芳久, 瓜谷章, 北口雅暁, 鬼柳善明, 佐藤和也, 清水裕彦, 竹下隼人, 土田一輝, 釣田幸雄, 広田克也, 古澤大貴, 三和田靖彦, 山形豊, 山崎淳, 吉橋幸子, 渡辺賢一

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 228 - 228 2017年

時間反転対称性の破れの探索における、高計数率中性子検出器の開発 Open Access

遠藤駿典, 奥平琢也, 清水裕彦, 北口雅暁, 広田克也, 岡田晏珠, 伊藤維久弥, 山本知樹, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 木村敦, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 356 - 356 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>我々は原子核の複合核共鳴を用いて、時間反転対称性の破れの探索に取り組んでいる。この実験において必要な統計数の確保のために、1Gcpsの検出計数を持つ中性子検出器が必要となる。しかし現行の検出器では十分とは言えず、高計数率を持つ中性子検出器の開発が必須である。その上で正確な中性子数の把握のために、γ線バックグラウンドの排除も必要となる。当講演では現状の開発の進捗及び今後の展望について報告する。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_356

結晶回折法を用いた中性子EDM探索実験のシミュレーション Open Access

中路雅也, 伊藤茂康, 内田裕也, 北口雅暁, 清水裕彦

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 283 - 283 2017年

結晶回折法を用いた中性子EDM探索実験の設計 Open Access

中路雅也, 伊藤茂康, 北口雅暁, 清水裕彦

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 270 - 270 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子電気双極子能率(EDM)探索はCP対称性の破れの探索の良いプローブである。ある種の結晶に存在する強力な電場(10^8^から10^9^[V/cm]程度)を利用することで中性子EDMを高い感度で測定できる可能性がある。現在我々はBi_12_GeO_20_を用いた実験を計画している。本講演では、将来的なEDM探索実験に向けた試料周りの磁場環境の設計などの検討について報告する。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_270

複合核共鳴の時間反転対称性の破れ－<sup>117</sup>Sn及び<sup>115</sup>Inの(n,γ)反応測定の解析の現状－ Open Access

古賀淳, 高田秀佐, 吉岡瑞樹, 清水裕彦, 広田克也, 奥平琢也, 大井法子, 伊藤維久弥, 山本知樹, 遠藤駿典, 北口雅暁, 木村敦, 酒井健二, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 257 - 257 2017年

複合核共鳴を用いた時間反転対称性の破れの探索のための偏極核標的に対する要請について Open Access

清水裕彦, 北口雅暁, 広田克也, 奥平琢也, 大井法子, 伊藤維久弥, 山本知樹, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 宮地義之, 酒井健二, 日野正裕, 嶋達志, 郡英輝, 山形豊

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 261 - 261 2017年

複合核共鳴を用いた時間反転対称性の破れの探索のための偏極核標的内での中性子偏極度の挙動について Open Access

清水裕彦, 北口雅暁, 広田克也, 奥平琢也, 岡田晏珠, 伊藤維久弥, 山本知樹, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 飯沼昌隆, 岩田高広, 宮地義之, 酒井健二, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 301 - 301 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>複合核状態を利用したT-violationの研究では、偏極中性子を偏極核標的に入射させる。その際、P-violationやT-violationに無関係なスピンスピン相互作用の影響による中性子スピンの挙動を正しく評価しておくことが、微小なT-violationの探索を実行する上での前提となる。そこで偏極核標的内での中性子偏極度の挙動を考察し、その影響を抑制する方法について議論する。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_301

複合核状態における時間反転対称性の破れ-(n,γ)反応の角相関項の高精度測定 Open Access

奥平琢也, 清水裕彦, 北口雅暁, 広田克也, 岡田晏珠, 伊藤維久弥, 山本知樹, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 木村敦, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 300 - 300 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子共鳴吸収反応において時間反転対称性の破れが増幅されることが示唆されている。我々はこの探索に向けて複合核状態での(n,γ)反応を調査する実験をJ-PARC BL04で進めている。(n,γ)反応におけるγ線の角相関はFlambaumにより予言されているが、詳細な検証は未だ行われていない。本公演では前回公演よりも高精度化したγ線の角相関測定の結果と理論的予測との比較について論じる。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_300

複合核状態における時間反転対称性の破れ-<sup>139</sup>La(n,γ)反応のγ線角分布の高精度測定：実験と解析 Open Access

奥平琢也, 清水裕彦, 北口雅暁, 広田克也, 大井法子, 伊藤維久弥, 山本知樹, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 木村敦, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 256 - 256 2017年

複合核状態における時間反転対称性の破れ探索のための中性子偏極デバイスの開発 Open Access

山本知樹, 清水裕彦, 北口雅暁, 広田克也, 奥平琢也, 岡田晏珠, 伊藤維久弥, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 木村敦, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 303 - 303 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子共鳴吸収反応による複合核状態では部分波干渉によって空間反転対称性の破れが増幅されることが知られている。時間反転対称性も同様に増幅されることが示唆されている。我々はこの探索に向けて複合核状態での(n,γ)反応測定をJ-PARC BL04で進めている。講演では本実験において必要な中性子偏極デバイスの開発の現状について報告を行う。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_303

複合核状態における時間反転対称性の破れ探索のための偏極中性子を用いた空間反転対称性の破れ測定 Open Access

山本知樹, 清水裕彦, 北口雅暁, 広田克也, 奥平琢也, 大井法子, 伊藤維久弥, 遠藤駿典, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 木村敦, 奥隆之, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 258 - 258 2017年

複合核状態における時間反転対称性の破れ探索実験計画 Open Access

北口雅暁, 清水裕彦, 広田克也, 奥平琢也, 岡田晏珠, 伊藤維久弥, 山本知樹, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 木村敦, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 299 - 299 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子吸収反応による複合核共鳴状態では部分波干渉によって対称性の破れが増幅する。時間反転対称性の破れについても電気双極子能率を超えた感度を持つ可能性がある。現在候補となるいくつかの標的核について、増幅度を見積もるための測定を進めている。J-PARCでの実験計画について報告する。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_299

複合核状態における時間反転対称性の破れ探索実験計画 Open Access

北口雅暁, 清水裕彦, 広田克也, 奥平琢也, 大井法子, 伊藤維久弥, 山本知樹, 遠藤駿典, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 木村敦, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 255 - 255 2017年

複合核状態における時間反転対称性の破れ－Brデータの解析 Open Access

伊藤維久弥, 清水裕彦, 北口雅暁, 広田克也, 奥平琢也, 岡田晏珠, 山本知樹, 高田秀佐, 古賀淳, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 木村敦, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 302 - 302 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子共鳴吸収反応において時間反転対称性の破れが増幅されることが示唆されている。我々はこの探索に向けて候補となる原子核の(n,γ)反応の測定をJ-PARC BL04で進めている。本公演では、Brを使用した実験のデータの解析の結果について発表する。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_302

MTV Run2016の報告I Open Access

清水裕太, 尾崎早智, 梶原拓真, 坂元祐子, 益田英知, 村田次郎, 山脇友志, 渡辺悦子, 後藤文也, 北口雅暁, 清水裕彦, 横橋麻美, 越川亜美, 馬場秀忠, 川村広和

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 304 - 304 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>MTV実験ではベータ崩壊角相関項の測定を通して時間反転対称性の破れを検証し、標準理論を超える物理の探索することを目標としてきた。昨年度までの実験で、新たにgas chamber内のgain reductionによる系統性が見つかった。本講演では、今年度行われた偏極8Liビームを用いたPhysics Runに向けての系統性の抑制について報告する。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_304

J-PARC/BL05における中性子-希ガス散乱を用いた未知相互作用探索実験 Open Access

大井法子, 清水裕彦, 広田克也, 北口雅暁, 吉岡瑞樹, 松本悟, 三島賢二, 猪野隆, 嶋達志

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 298 - 298 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>我々は大強度陽子加速器施設（J-PARC）において中性子と希ガスの散乱を用いた未知相互作用探索を行っている。中性子は電荷がなく原子間力を抑えられる粒子である。散乱標的に希ガスを使い、中性子の散乱角度分布を精密に測定することで、ナノメートルスケールの未知相互作用を探索することができる。2016年6月と11月にデータを取得し、順次解析を行っている。実験とデータ解析の結果を報告する。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_298

J-PARC/BL05における中性子寿命測定実験:背景事象の見積もり Open Access

家城斉, 山田崇人, 長倉直樹, 山下了, 関義親, 角野浩史, 清水裕彦, 広田克也, 横橋麻美, 北口雅暁, 吉岡瑞樹, 音野瑛俊, 富田龍彦, 角直幸, 森下彩, 古賀淳, 岩下芳久, 北原龍之介, 生出秀行, 嶋達志, 三島賢二, 猪野隆, 竹谷薫

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 65 - 65 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>本研究はJ-PARC/BL05において中性子寿命測定実験を行っている。これまで寿命は2つの手法によって測定されており、それら結果には3.8σの乖離があるため、より高い精度で寿命を測ることと、不確かさを正確に見積もることが重要になっている。本研究はビーム法と呼ばれる手法に基づき、中性子をTime Projection Chamber(TPC)に入射して、その中で崩壊した中性子の崩壊生成物を検出する。先行研究との違いは、崩壊生成物のうち陽子ではなく電子を検出対象としていることであり、この電子の同定が寿命の値に不定性を与える大きな要因の1つになっている。電子の背景事象ではTPCに封入したガスに起因するものが重要であり、本講演では背景事象の見積もりについて報告する。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_65

J-PARC/BL05における中性子寿命測定実験：中性子捕獲ガンマ線の解析結果 Open Access

古賀淳, 角直幸, 高田秀佐, 富田龍彦, 森下彩, 音野瑛俊, 吉岡瑞樹, 北原龍之介, 岩下芳久, 山田崇人, 家城斉, 長倉直樹, 山下了, 関義親, 角野浩史, 清水裕彦, 広田克也, 奥平琢也, 横橋麻美, 北口雅暁, 三島賢二, 猪野隆, 竹谷薫, 木村敦, 生出秀行, 嶋達志

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 64 - 64 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子寿命はCKM行列のVud項及びビッグバン元素合成論において重要なパラメータであり、これまで2手法で測定されてきた。しかし、両者の測定結果には8.4秒の乖離があり、異なる手法での測定が必要となる。本実験は検出器内で生じた中性子の崩壊を電子によって同定する。しかし、中性子捕獲反応由来のガンマ線が電子を発生させることがあり、これは背景事象となる。この背景事象を理解するためにJ−PARC/MLF/BL04で検出器と同素材の試料の中性子照射試験を行った。本講演ではその解析結果を報告する。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_64

J-PARC/BL05における中性子寿命測定実験：大型中性子輸送光学系の性能評価 Open Access

横橋麻美, 広田克也, 清水裕彦, 北口雅暁, 北原龍之介, 岩下芳久, 吉岡瑞樹, 音野瑛俊, 山田崇人, 山下了, 関義親, 生出秀行, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 63 - 63 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子寿命は、ビッグバン元素合成理論やCKM行列のユニタリティ検証に重要なパラメーターであり、我々は1秒の精度での測定を目標としている。目標達成のためには中性子ビームのフラックス増強のためにビーム口径を拡大する必要があり、大型中性子輸送光学系を作成した。本講演では実装する光学系の性能評価について発表する。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_63

J-PARC/BL05における中性子寿命測定実験：実験の現状と最新結果 Open Access

三島賢二, 広田克也, 家城斉, 猪野隆, 岩下芳久, 北口雅暁, 北原龍之介, 古賀淳, 森下彩, 長倉直樹, 生出秀行, 音野瑛俊, 関義親, 関場大一郎, 嶋達志, 清水裕彦, 角直幸, 角野浩史, 竹谷薫, 富田龍彦, 山田崇人, 山下了, 横橋麻美, 吉岡瑞樹

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 75 - 75 2017年

J-PARC/BL05における中性子寿命測定実験：新アンプの評価と低ガス圧運転 Open Access

富田龍彦, 角直幸, 森下彩, 古賀淳, 音野瑛俊, 吉岡瑞樹, 北原龍之介, 岩下芳久, 山田崇人, 山下了, 広田克也, 清水裕彦, 横橋麻美, 北口雅暁, 生出秀行, 嶋達志, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 73 - 73 2017年

J-PARC/BL05における中性子寿命測定実験：新アンプ・新検出器の試験 Open Access

富田龍彦, 角直幸, 森下彩, 古賀淳, 音野瑛俊, 吉岡瑞樹, 北原龍之介, 岩下芳久, 山田崇人, 山下了, 広田克也, 清水裕彦, 横橋麻美, 北口雅暁, 生出秀行, 嶋達志, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 92 - 92 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子の寿命は基礎的な物理パラメタ(CKM行列のVud要素など)に影響を与える。これまで、中性子寿命(~880sec)は２種類の手法において値が求められているが、この手法間には3.8σのずれが存在している。そこで、我々NOPグループはJ-PARCにてこれらの実験とは独立な手法で0.1%精度での寿命導出を目指している。NOPグループでは0.1%精度実現のために検出器の改良を行っており、本講演では新アンプと新検出器の試験に関する報告を行う。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_92

J-PARC/BL05における中性子寿命測定実験：高統計測定に向けたビームラインアップグレード Open Access

北原龍之介, 岩下芳久, 清水裕彦, 広田克也, 横橋麻美, 北口雅暁, 山下了, 山田崇人, 家城斉, 長倉直樹, 角野浩史, 吉岡瑞樹, 音野瑛俊, 富田龍彦, 角直幸, 森下彩, 古賀淳, 生出秀行, 嶋達志, 三島賢二, 猪野隆, 竹谷薫, 関義親, 関場大一郎

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 76 - 76 2017年

J-PARC/BL05における中性子－希ガス散乱を用いた未知相互作用探索実験－データ解析－ Open Access

大井法子, 清水裕彦, 広田克也, 北口雅暁, 吉岡瑞樹, 松本悟, 三島賢二, 猪野隆, 嶋達志

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 263 - 263 2017年

J-PARC/MLF での超冷中性子リバンチャーによる UCN 収束実験結果 Open Access

今城想平, 岩下芳久, 三島賢二, 北口雅暁, 清水裕彦, 猪野隆, 山下了, 広田克也, 後藤文也, 不破康裕, 片山領, NOP collaboration

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 77 - 77 2017年

Measurement of angular correlation of (n,gamma) reaction with polarized neutrons Open Access

Yamamoto T., Shimizu H.M., Kitaguchi M., Hirota K., Okudaira T., Takada S., Okada A., Yoshioka T., Ino T., Sakai K., Asahi K., Momose T., Iwata T., Hino M., Shima T., Yamagata Y.

Proceedings of Science 2017-January 巻 2017年

出版者・発行元：Proceedings of Science

Large enhanced P violation in a nuclear resonance reaction has been observed by using a polarized neutron beam. Enhanced CP violation is predicted to exist within the same nuclear reaction. We are now preparing to supply a polarized neutron beam for a CP violation search experiment. In the enhancement process of CP violation, we assume that the P violation of the compound nuclear state doesn't depend on the final state. However this assumption has not been verified yet. We plan to verify the assumption by measuring the 139La(n,g ) reaction with a polarized neutron beam at J-PARC MLF BL04. The supplied neutron beam will be polarized by using 3He spin filter, which will be installed into BL04. We present the states of development for 3He spin filter and study of the equipment in BL04.

DOI： 10.22323/1.294.0049

Measurement of neutron scattering from noble gas to search for a short-range unknown force Open Access

Noriko O.I., Shimizu H.M., Hirota K., Kitaguchi M., Haddock C.C., Snow W.M., Yoshioka T., Matsumoto S., Mishima K., Ino T., Shima T.

Proceedings of Science 2017-January 巻 2017年

出版者・発行元：Proceedings of Science

We are searching for an unknown force that could couple to mass using neutron scattering from a noble gas. The neutron is a chargeless massive particle with a long lifetime, which consequently is suitable for the precise measurement of a small interaction with a range of the order of 1nm by measurements of the momentum transfer distribution. We measured neutron scattering at the low-divergence beam branch on the BL05 NOP beamline in the Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex (J-PARC). We report recent experimental data.

DOI： 10.22323/1.281.0190

Measurement of neutron scattering from noble gas to search for a short-range unknown force at J-PARC - Overview and Simulation Results Open Access

Haddock C. C., Ino Takashi, Shima Tatsushi, Oi Noriko, Shimizu Hirohiko M., Hirota Katsuya, Kitaguchi Masaaki, Snow W. M., Yoshioka Tamaki, Matsumoto Satoru, Mishima Kenji

日本物理学会講演概要集 72.2 巻 ( 0 ) 頁： 262 - 262 2017年

MTV Run-2016の報告 II Open Access

後藤文也, 北口雅暁, 清水裕彦, 横橋麻美, 尾崎早智, 梶原拓真, 坂元祐子, 清水裕太, 益田英知, 村田次郎, 山脇友志, 渡辺悦子, 越川亜美, 馬場秀忠, 川村広和

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 305 - 305 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>原子核のベータ崩壊角相関におけるR項は原子核スピン・電子運動量・電子スピンの三重項で表され、時間反転変換に対して符号を反転する。MTV実験ではR相関項の測定を通して時間反転対称性の破れを検証し、標準理論を超える物理の探索することを目標としてきた。本講演では偏極8Liビームを用いたPhysics Run の測定方法と測定内容と解析について報告する。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_305

<sup>139</sup>Laの中性子共鳴吸収の断面積の測定 Open Access

竹下隼人, 清水裕彦, 北口雅暁, 広田克也, 市川豪, 奥平琢也, 岡田晏珠, 後藤文也, 長元孝介, 山本知樹, 高田秀佐, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 日野正裕, 嶋達志, 山形豊, 木村敦

日本物理学会講演概要集 72.1 巻 ( 0 ) 頁： 360 - 360 2017年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>ある種の核における中性子共鳴吸収反応では時間反転対称性の破れの効果が増幅される可能性が示唆されている。その核の候補の一つである^139^Laの中性子共鳴吸収反応での増幅の効果を知るために共鳴パラメータを決定する必要がある。本講演では、J-PARCで行った実験のデータを解析した結果を報告する。</p>

DOI： 10.11316/jpsgaiyo.72.1.0_360

Development of high spatial resolution cold/ultracold neutron detector using fine-grained nuclear emulsion Open Access

Naganawaa N., Awano S., Hino M., Hirose M., Hirota K., Kawahara H., Kitaguchi M., Mishima K., Nagae T., Shimizu H.M., Tada S., Tasaki S., Umemoto A.

Proceedings of Science 2017-January 巻 2017年

出版者・発行元：Proceedings of Science

We have been developing neutron detectors with spatial resolution of submicron to several tens of nanometers using fine-grained nuclear emulsion with nuclides with large neutron absorption cross sections such as <sup>6</sup>Li and <sup>10</sup>B. Those detectors were demonstrated their ability to detect cold and ultra-cold neutrons.

DOI： 10.22323/1.294.0077

The MTV experiment: searching for T-violation in polarized Li-8 at TRIUMF

Murata, J; Baba, H; Behr, JA; Goto, F; Inaba, S; Kawamura, H; Kitaguchi, M; Levy, CDP; Masuda, H; Nakaya, Y; Ninomiya, K; Onishi, J; Openshaw, R; Pearson, M; Sakamoto, Y; Shimizu, H; Shimizu, Y; Tanaka, S; Tanaka, Y; Tanuma, R; Totsuka, Y; Watanabe, E; Yokohashi, M

HYPERFINE INTERACTIONS 237 巻 ( 1 ) 2016年8月

出版者・発行元：Hyperfine Interactions

The MTV experiment (Mott Polarimetry for T-Violation Experiment) is running at TRIUMF, to search for a large T-violating transverse electron-polarization in polarized <sup>8</sup>Li β-decay. We aim at reaching precision of 10<sup>−4</sup> for the R-correlation, which is defined as a T-violating triple vector correlation in the β-decay rate function. A Mott polarimeter system using a CDC (Cylindrical Drift Chamber) is used to measure the left-right scattering asymmetry in the Mott scattering from a thin metal foil. In the present study, we aim to discuss systematic effects in Mott polarimetry using the CDC.

DOI： 10.1007/s10751-016-1336-z

Neutron-antineutron oscillations: Theoretical status and experimental prospects Open Access

Phillips, DG II; Snow, WM; Babul, K; Banerjee, S; Baxter, DV; Berezhiani, Z; Bergevin, M; Bhattacharya, S; Brooijmans, G; Castellanos, L; Chen, MC; Coppola, CE; Cowsik, R; Crabtree, JA; Das, P; Dees, EB; Dolgov, A; Ferguson, PD; Frost, M; Gabrie, T; Gal, A; Gallmeier, F; Ganezer, K; Golubeva, E; Greene, G; Hartfiel, B; Hawari, A; Heilbronn, L; Johnson, C; Kamyshkov, Y; Kerbikov, B; Kitaguchi, M; Kopeliovich, BZ; Kopeliovich, VB; Kuzmin, VA; Liu, CY; McGaughey, P; Mocko, M; Mohapatra, R; Mokhov, N; Muhrer, G; Mumm, HP; Okun, L; Pattie, RW ; Quigg, C; Ramberg, E; Ray, A; Roy, A; Ruggles, A; Sarkar, U; Saunders, A; Serebrov, AP; Shimizu, HM; Shrock, R; Sikdar, AK; Sjue, S; Striganov, S; Townsend, LW; Tschirhart, R; Vainshtein, A; Van Kooten, R; Wang, Z; Young, AR

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS 612 巻頁： 1 - 45 2016年2月

出版者・発行元：Physics Reports

The observation of neutrons turning into antineutrons would constitute a discovery of fundamental importance for particle physics and cosmology. Observing the n-n transition would show that baryon number (B) is violated by two units and that matter containing neutrons is unstable. It would provide a clue to how the matter in our universe might have evolved from the B = 0 early universe. If seen at rates observable in foreseeable nextgeneration experiments, it might well help us understand the observed baryon asymmetry of the universe. A demonstration of the violation of B-L by 2 units would have a profound impact on our understanding of phenomena beyond the Standard Model of particle physics. Slow neutrons have kinetic energies of a few meV. By exploiting new slow neutron sources and optics technology developed for materials research, an optimized search for oscillations using free neutrons from a slow neutron moderator could improve existing limits on the free oscillation probability by at least three orders of magnitude. Such an experiment would deliver a slow neutron beam through a magnetically-shielded vacuum chamber to a thin annihilation target surrounded by a low-background antineutron annihilation detector. Antineutron annihilation in a target downstream of a free neutron beam is such a spectacular experimental signature that an essentially background-free search is possible. An authentic positive signal can be extinguished by a very small change in the ambient magnetic field in such an experiment. It is also possible to improve the sensitivity of neutron oscillation searches in nuclei using large underground detectors built mainly to search for proton decay and detect neutrinos. This paper summarizes the relevant theoretical developments, outlines some ideas to improve experimental searches for free neutron oscillations, and suggests avenues both for theoretical investigation and for future improvement in the experimental sensitivity.

DOI： 10.1016/j.physrep.2015.11.001

Pulsed ultra-cold neutron production using a Doppler shifter at J-PARC Open Access

Imajo, S; Mishima, K; Kitaguchi, M; Iwashita, Y; Yamada, NL; Hino, M; Oda, T; Ino, T; Shimizu, HM; Yamashita, S; Katayama, R

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS 2016 巻 ( 1 ) 2016年1月

出版者・発行元：Progress of Theoretical and Experimental Physics

We have constructed a Doppler-shifter-type pulsed ultra-cold neutron (UCN) source at the Materials and Life Science Experiment Facility of the Japan Proton Accelerator Research Complex. Very cold neutrons (VCNs) with 136 m s<sup>-1</sup> velocity in a neutron beam supplied by a pulsed neutron source are decelerated by reflection on an m = 10 wide-band multilayer mirror, yielding pulsed UCNs. The mirror is fixed to the tip of a 2000 rpm rotating arm moving with 68 m s<sup>-1</sup> velocity in the same direction as the VCNs. The repetition frequency of the pulsed UCNs is 8.33 Hz and the time width of the pulse at production is 4.4 ms. In order to increase the UCN flux, a supermirror guide, wide-band monochromatic mirrors, focus guides, and a UCN extraction guide have been newly installed or improved. The 1 MW-equivalent count rate of the output neutrons with longitudinal wavelengths longer than 58 nm is 1.6 × 10<sup>2</sup> cps, while that of the true UCNs is 80 cps. The spatial density at production is 1.4 UCN cm<sup>-3</sup>. This new UCN source enables us to research and develop apparatuses necessary for the investigation of the neutron electric dipole moment.

DOI： 10.1093/ptep/ptv177

超冷中性子リバンチャーの性能評価 Open Access

今城想平, 岩下芳久, 三島賢二, 北口雅暁, 清水裕彦, 猪野隆, 山下了, NOP collaboration

日本物理学会講演概要集 71.2 巻 ( 0 ) 頁： 64 - 64 2016年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>我々はパルス中性子源を用いた中性子電気双極子能率探索実験において実験容器へ封入する超冷中性子(UCN)の体積密度を向上させる装置「UCNリバンチャー」を開発しその改良を進めてきた。UCNリバンチャーは勾配磁場とスピンフリッパーを組み合わせた中性子加速器である。我々はスピンフリッパーの改良機を作成し、現在その動作の調整および性能評価を進めている。今回は改良リバンチャーの性能試験結果について報告する。</p>

DOI： 10.11316/jpsgaiyo.71.2.0_64

中性子EDM測定のためのBi<sub>12</sub>GeO<sub>20</sub>結晶内電場の測定 Open Access

伊藤茂康, 中路雅也, 北口雅暁, 清水裕彦

日本物理学会講演概要集 71.2 巻 ( 0 ) 頁： 276 - 276 2016年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子EDMの存在は時間反転対称性を破り、その探索は新しい物理の良いプローブである。我々は結晶内に存在する強い電場を利用した中性子EDM測定実験を進めている。今回はJ-PARC BL17で行ったBi_12_GeO_20_結晶の内部電場測定実験の結果を報告する。</p>

DOI： 10.11316/jpsgaiyo.71.2.0_276

名古屋大学加速器駆動中性子源(NUANS)のビームラインの設計 Open Access

伊藤維久弥, 清水裕彦, 北口雅暁, 広田克也, 市川豪, 鬼柳善明, 土田一輝, 瓜谷章, 吉橋幸子, 渡辺賢一, 山崎淳, 三和田靖彦, 山形豊, 岩下芳久

日本物理学会講演概要集 71.2 巻 ( 0 ) 頁： 295 - 295 2016年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>名古屋大学に新しく設置される名古屋大学加速器駆動中性子源( NUANS)の2ndビームラインを設計するために行った遮蔽計算の過程や結果、陽子加速器の出口からNUANSの2ndビームラインのターゲットまでの陽子ビームの輸送計算などについて述べる。また、この名古屋大学加速器駆動中性子源の2ndビームラインを使用してどのような実験を行うことができるのかについても述べる。</p>

DOI： 10.11316/jpsgaiyo.71.2.0_295

結晶内電場を利用した中性子EDM探索に用いる結晶、実験体系の可能性 Open Access

中路雅也, 伊藤茂康, 北口雅暁, 清水裕彦

日本物理学会講演概要集 71.2 巻 ( 0 ) 頁： 277 - 277 2016年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子EDMの探索は新しい物理の良いプローブである。結晶内の強力な電場を用いることで高い感度で中性子EDMを探索できる可能性がある。現在BGO結晶を用いた実験を計画しており、結晶内電場を測定するための実験体系をJ-PARC中性子ビームラインに構築した。本講演では、EDM探索により適した結晶と実験の検討について報告する。</p>

DOI： 10.11316/jpsgaiyo.71.2.0_277

J-PARC/MLF/BL05における冷中性子ビームを用いた<sup>14</sup>N(n,p)<sup>14</sup>C反応断面積測定 Open Access

北原龍之介, 岩下芳久, 清水裕彦, 広田克也, 横橋麻美, 北口雅暁, 吉岡瑞樹, 音野瑛俊, 森下彩, 角直幸, 富田龍彦, 山下了, 長倉直樹, 家城斉, 山田崇人, 嶋達志, 関義親, 生出秀行, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 71.2 巻 ( 0 ) 頁： 174 - 174 2016年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>^14^N(n,p)^14^Cは恒星中のs-processにおいて中性子を吸収してしまうため、CNOサイクル等の元素合成過程を阻害する反応の一つである。この反応断面積をJ-PARC/MLF/BL05の冷中性子ビームと中性子寿命測定用Time Prohection Chamberを用いてこれまでの断面積データの精度を超える統計精度で測定した。本講演では測定データの解析結果を報告する。</p>

DOI： 10.11316/jpsgaiyo.71.2.0_174

J-PARC/BL05における中性子-希ガス散乱を用いた未知相互作用探索実験 Open Access

大井法子, 清水裕彦, 広田克也, 北口雅暁, 吉岡瑞樹, 松本悟, 三島賢二, 猪野隆, 嶋達志

日本物理学会講演概要集 71.2 巻 ( 0 ) 頁： 256 - 256 2016年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>我々は大強度陽子加速器施設（J-PARC）において中性子と希ガスの散乱を用いた未知相互作用探索を行っている。中性子は電荷がなく原子間力を抑えられる粒子である。散乱標的に希ガスを使い、中性子の散乱角度分布を測定することで、ナノメートルスケールの未知相互作用を探索することができる。実験は2016年3月に行い解析を進めている。実験と解析、またこの実験のため開発したシミュレーションについて報告する。</p>

DOI： 10.11316/jpsgaiyo.71.2.0_256

J-PARC/BL05における中性子寿命測定実験：信号事象の同定 Open Access

家城斉, 山田崇人, 長倉直樹, 山下了, 関義親, 角野浩史, 清水裕彦, 広田克也, 横橋麻美, 北口雅暁, 吉岡瑞樹, 音野瑛俊, 富田龍彦, 角直幸, 森下彩, 岩下芳久, 北原龍之介, 生出秀行, 嶋達志, 三島賢二, 猪野隆, 竹谷薫

日本物理学会講演概要集 71.2 巻 ( 0 ) 頁： 60 - 60 2016年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子の寿命はビッグバン元素合成やCKM行列のVud項を決定づける重要なパラメータである。これまでビーム法とボトル法の2つの手法によって寿命が測定されているが、両者の測定結果には8.4秒の乖離が存在する。本研究はビーム法に基づくが、中性子の崩壊を電子によって同定することで、先行研究と異なる不確かさで寿命を導出することができる。本講演では信号事象の同定と背景事象の評価について発表する。</p>

DOI： 10.11316/jpsgaiyo.71.2.0_60

J-PARC/BL05における中性子寿命測定実験：大型中性子輸送光学系の開発 Open Access

横橋麻美, 広田克也, 清水裕彦, 北口雅暁, 北原龍之介, 岩下芳久, 吉岡瑞樹, 音野瑛俊, 山田崇人, 山下了, 関義親, 生出秀行, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 71.2 巻 ( 0 ) 頁： 79 - 79 2016年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子寿命は、ビッグバン元素合成理論やCKM行列のユニタリティ検証に重要なパラメーターであり、我々は1秒の精度での測定を目標としている。中性子ビームのフラックス増強のためにビーム口径を拡大する必要がある。そのための大型中性子輸送光学系を作成した。本講演ではその開発と評価について発表する。</p>

DOI： 10.11316/jpsgaiyo.71.2.0_79

J-PARC/BL05における中性子寿命測定実験：新検出器・アンプ開発 Open Access

富田龍彦, 角直幸, 森下彩, 音野瑛俊, 吉岡瑞樹, 北原龍之介, 岩下芳久, 山田崇人, 山下了, 広田克也, 清水裕彦, 横橋麻美, 北口雅暁, 生出秀行, 嶋達志, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 71.2 巻 ( 0 ) 頁： 59 - 59 2016年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子の寿命は基礎的な物理パラメーター(CKM行列のVud要素など)に影響を与える。これまで、中性子寿命(~880sec)は2種類の手法において値が求められているが、この手法間には3.8σのずれが存在している。そこで、我々NOPグループはJ-PARCにてこれらの実験とは独立な手法で0.1%精度での寿命導出を目指している。本講演は0.1%精度での測定に向けた検出器開発の進捗状況とアンプ開発の現状について報告する。</p>

DOI： 10.11316/jpsgaiyo.71.2.0_59

J-PARC/BL05における中性子寿命測定実験：検出効率・その他系統誤差と結果 Open Access

山田崇人, 家城斉, 長倉直樹, 山下了, 角野浩史, 清水裕彦, 広田克也, 横橋麻美, 北口雅暁, 吉岡瑞樹, 音野瑛俊, 富田龍彦, 角直幸, 森下彩, 岩下芳久, 北原龍之介, 生出秀行, 嶋達志, 三島賢二, 猪野隆, 竹谷薫, 関義親

日本物理学会講演概要集 71.2 巻 ( 0 ) 頁： 61 - 61 2016年

記述言語：日本語出版者・発行元：一般社団法人日本物理学会

<p>中性子寿命はビッグバン元素合成やCKM行列のVud項の入力パラメータとなる重要な物理量である。現在中性子寿命の世界平均値を決定づけている実験では大別して2つの手法が用いられているが、それらの結果には3.8σの乖離がある。本研究はその2つの手法とは別の手法を用いており、全く異なる系統誤差を持つ実験である。最新の物理データを取得したので、本実験の系統誤差と結果を報告する。</p>

DOI： 10.11316/jpsgaiyo.71.2.0_61

20pAH-10 J-PARC/BL05における中性子寿命測定実験 : ^3He数密度と中性子数評価 Open Access

三島賢二, 猪野隆, 竹谷薫, 山下了, 山田崇人, 横山晴道, 家城斉, 長倉直樹, 角野浩史, 清水裕彦, 広田克也, 榊原理紗, 杉野智昭, 横橋麻美, 北口雅暁, 吉岡瑞樹, 音野瑛俊, 田中元気, 富田龍彦, 角直幸, 森下彩, 岩下芳久, 北原龍之介, 生出秀行, 嶋達志, 関義親

日本物理学会講演概要集 71.1 巻 ( 0 ) 頁： 109 2016年

22pAX-5 TRIUMF-MTV実験の為のスピンフリップに同期する系統性抑制法の開発 Open Access

坂元祐子, 馬場秀忠, 榎園昭智, 後藤文也, 羽取美令, 稲葉尚輝, 川村広和, 北口雅暁, 益田英知, 長島徹, 二宮一史, 尾崎早智, 清水裕彦, 清水裕太, 田中祐太郎, 田沼良介, 渡辺悦子, 横橋麻美, 村田次郎

日本物理学会講演概要集 71.1 巻 ( 0 ) 頁： 448 2016年

22pAX-4 複合核状態における時間反転対称性の破れ : Xe(n,γ)反応の実験と解析 Open Access

奥平琢也, 清水裕彦, 北口雅暁, 広田克也, 市川豪, 岡田晏珠, 後藤文也, 長元孝介, 高田秀佐, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 71.1 巻 ( 0 ) 頁： 447 2016年

22pAX-2 複合核状態における時間反転対称性の破れ : 実験の計画と現状 Open Access

北口雅暁, 清水裕彦, 広田克也, 市川豪, 奥平琢也, 岡田晏珠, 後藤文也, 長元孝介, 高田秀佐, 吉岡瑞樹, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 日野正裕, 嶋達志, 山形豊

日本物理学会講演概要集 71.1 巻 ( 0 ) 頁： 446 2016年

22pAX-1 複合核状態における時間反転対称性の破れ : 核偏極標的内の中性子スピンの挙動 Open Access

清水裕彦, 北口雅暁, 広田克也, 市川豪, 奥平琢也, 岡田晏珠, 後藤文也, 長元孝介, 高田秀佐, 吉岡瑞樹, 猪野隆, 百瀬孝昌, 岩田高広, 宮地義之, 嶋達志, 山形豊, 酒井健二, 原田秀郎, 木村敦, 藤暢輔, 旭耕一郎, 日野正裕

日本物理学会講演概要集 71.1 巻 ( 0 ) 頁： 445 2016年

22aAH-4 J-PARC/BL05における中性子寿命測定実験 : 新検出器開発 Open Access

森下彩, 角直幸, 富田龍彦, 音野瑛俊, 吉岡瑞樹, 北原龍之介, 岩下芳久, 山田崇人, 横山晴道, 山下了, 広田克也, 清水裕彦, 北口雅暁, 生出秀行, 嶋達志, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 71.1 巻 ( 0 ) 頁： 145 2016年

20pAP-8 J-PARC/BL05における中性子寿命測定実験 : 入射ビーム増強のための光学系 Open Access

横橋麻美, 広田克也, 清水裕彦, 北口雅暁, 北原龍之介, 岩下芳久, 吉岡瑞樹, 音野瑛俊, 山田崇人, 山下了, 関義親, 生出秀行, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 71.1 巻 ( 0 ) 頁： 585 2016年

20pAP-7 J-PARC/BL05における中性子寿命測定実験 : 大型Spin Flip Chopper開発 Open Access

北原龍之介, 岩下芳久, 横橋麻美, 広田克也, 清水裕彦, 北口雅暁, 吉岡瑞樹, 音野瑛俊, 山田崇人, 山下了, 関義親, 生出秀行, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 71.1 巻 ( 0 ) 頁： 584 2016年

20pAH-9 J-PARC/BL05における中性子寿命測定実験 : 2014/2015年データ解析 Open Access

角直幸, 田中元気, 富田龍彦, 森下彩, 吉岡瑞樹, 音野瑛俊, 北原龍之介, 岩下芳久, 山田崇人, 家城斉, 長倉直樹, 横山晴道, 山下了, 角野浩史, 榊原理紗, 杉野智昭, 横橋麻美, 広田克也, 清水裕彦, 北口雅暁, 生出秀行, 關義親, 嶋達志, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 71.1 巻 ( 0 ) 頁： 108 2016年

20pAH-8 J-PARC/BL05における中性子寿命測定実験 : シミュレーションを用いたベータ崩壊事象の検出効率の評価 Open Access

長倉直樹, 山田崇人, 横山晴道, 家城斉, 山下了, 関義親, 角野浩史, 清水裕彦, 広田克也, 榊原理紗, 杉野智昭, 横橋麻美, 北口雅暁, 吉岡瑞樹, 音野瑛俊, 田中元気, 角直幸, 富田龍彦, 森下彩, 岩下芳久, 北原龍之介, 生出秀行, 嶋達志, 三島賢二, 猪野隆, 竹谷薫

日本物理学会講演概要集 71.1 巻 ( 0 ) 頁： 107 2016年

20pAH-12 J-PARC MLFでの中性子ドップラーシフターを用いた超冷中性子リバンチャーの開発 Open Access

今城想平, 岩下芳久, 三島賢二, 北口雅暁, 清水裕彦, 猪野隆, 山田悟史, 山下了, 片山領, NOP collaboration

日本物理学会講演概要集 71.1 巻 ( 0 ) 頁： 110 2016年

The MTV experiment: From T violation to lorentz violation Open Access

Murata J., Baba H., Behr J.A., Goto F., Inaba S., Kawamura H., Kitaguchi M., Levy C.D.P., Masuda H., Nakaya Y., Ninomiya K., Onishi J., Openshaw R., Ozaki S., Pearson M., Sakamoto Y., Shimizu H., Shimizu Y., Tanaka S., Tanaka Y., Tanuma R., Totsuka Y., Watanabe E., Yokohashi M.

Proceedings of Science 2016-September 巻 2016年

出版者・発行元：Proceedings of Science

The MTV (Mott Polarimetry for T-Violation) experiment is running at TRIUMF-ISAC (Isotope Separator and ACcelerator), searching for a large T violation in polarized <sup>8</sup>Li β decay via measurements of the triple vector correlation, R, in the β decay rate function. The left/right backward scattering asymmetry of Mott scattering from a thin metal foil is measured using an electron tracking detector including a cylindrical drift chamber (CDC). To achieve 10-ppm precision in the Mott scattering asymmetry, we performed multiple studies on the expected systematic effects. The sources of the systematics have been identified and calibration systems have been developed to evaluate the fake effects. The first physics data was collected in 2016 and significantly improved on the result of our previous measurement, which achieved 100-ppm precision in 2010 using the first generation detector (planer drift chamber) at TRIUMF. The data measurement status, together with the results of the systematics studies, is described here. In addition to the T violation, we are preparing to test the Lorentz invariance in the weak sector via our Mott analyzer system. Unexplored Lorentz violating correlations can be tested using the MTV experimental setup. The testing principle and preparation status are also described here.

DOI： 10.22323/1.281.0185

Discrete symmetry tests in neutron-induced compound states Open Access

Shimizu H.M., Snow W.M., Gudkov V.P., Bowman J.D., Curole J., Goodson B.M., Harada H., Hautle P., Hino M., Hirota K., Ichikawa G., Ino T., Ishimoto S., Iwata T., Kimura A., Kitaguchi M., Kiyanagi Y., Koga J., Mishima K., Miyachi Y., Momose T., Morishima T., Nagamoto K., Okada A., Okudaira T., Penttila S., Plaster B., Sakai K., Schaper D., Takada S., Taketani K., Tong X., Tremsin A.S., Yamagata Y., Yamamoto T., Yamanaka N., Yokohashi M., Yoshioka T.

Proceedings of Science 2016-September 巻 2016年

Development of ultracold neutron accelerator for time focusing of pulsed neutrons Open Access

Imajo S., Iwashita Y., Kitaguchi M., Shimizu H.M., Mishima K., Ino T., Yamashita S.

Proceedings of the 28th Linear Accelerator Conference Linac 2016 頁： 56 - 58 2016年

出版者・発行元：Proceedings of the 28th Linear Accelerator Conference Linac 2016

Low energy neutron accelerator can be realized by the combination of an adiabatic fast passage spin flipper and a gradient magnetic field. Neutrons have magnetic moments, so that the accumulated potential energies are not canceled before and after passage of a magnetic field and their kinetic energies change in case their spins are flipped in the field. This accelerator handles lower kinetic energy neutrons than approximately 300 neV. Currently we have developed the advanced version which makes it possible to handle broader kinetic energy range. The design and measured characteristics are described.

DOI： 10.18429/JACoW-LINAC2016-MOOP07

Measurement of angular correlations in the (n, γ) reaction for T Violation Search Open Access

Okudaira T., Shimizu H.M., Kitaguchi M., Hirota K., Takada S., Yamamoto T., Okada A., Yoshioka T., Ino T., Sakai K., Asahi K., Momose T., Iwata T., Hino M., Shima T., Yamagata Y.

Proceedings of Science 2016-September 巻 2016年

出版者・発行元：Proceedings of Science

Large enhanced P-violations was discovered in several compound nuclei. A mechanism of P-violation can be applied to enhancement of T-violation in compound nucleus. We plan the experiment for sensitive T-violation search, however, the mechanism of P-violation(s-p mixing) has not been verified in detail yet and the spin factor K(J) has not been measured in candidate nuclei for T-violation search. We need to measure angular distributions in the (n, y) reaction for verification of s-p mixing and determination of K(J) as a feasibility study for the T-violation search. The (n,γ) reaction of <sup>139</sup>La which is one of the candidate nuclei was measured with 4π germanium spectrometer in J-PARC/MLF/ANNRI. A neutron spectrum and a γ-ray spectrum for <sup>139</sup>La was obtained.

DOI： 10.22323/1.281.0188

Measurement of neutron scattering from noble gas to search for a short-range unknown force Open Access

Oi N., Shimizu H.M., Hirota K., Kitaguchi M., Haddock C.C., Snow W.M., Yoshioka T., Matsumoto S., Mishima K., Ino T., Shima T.

Proceedings of Science 2016-September 巻 2016年

出版者・発行元：Proceedings of Science

We are searching for an unknown force that could couple to mass using neutron scattering from a noble gas. The neutron is a chargeless massive particle with a long lifetime, which consequently is suitable for the precision measurement of a small interaction with a range of the order of 1nm by measurements of the momentum transfer distribution. We measured neutron scattering at the low-divergence beam branch on the BL05 NOP beamline in the Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex (J-PARC). We measured 10<sup>5</sup> scattering events and report our most recent analysis.

DOI： 10.22323/1.294.0050

Precise neutron lifetime experiment using pulsed neutron beams at J-PARC Open Access

Nagakura N., Hirota K., Ieki S., Ino T., Iwashita Y., Kitaguchi M., Kitahara R., Mishima K., Morishita A., Oide H., Otono H., Sakakibara R., Seki Y., Shima T., Shimizu H.M., Sugino T., Sumi N., Sumino H., Taketani K., Tanaka G., Tomita T., Yamada T., Yamashita S., Yokohashi M., Yoshioka T.

Proceedings of Science 2016-September 巻 2016年

出版者・発行元：Proceedings of Science

The neutron lifetime (τ<inf>n</inf>) is one of the basic parameters in the weak interaction, and is used for predicting the light element abundance in the early universe. Our group developed a new setup to measure τ<inf>n</inf> with the goal precision of 0.1% at the polarized beam branch BL05 of MLF, J-PARC. The commissioning data was acquired in 2014 and 2015, and the first set of data to evaluate τ<inf>n</inf> in 2016, which is expected to yield a statistical uncertainty of O(1)%. This paper presents the current analysis results and the future plans to achieve our goal precision.

DOI： 10.22323/1.281.0191

Feasibility study of neutron wavelength compressor for edm measurement Open Access

Kitaguchi M., Iwashita Y., Shimizu H.

Proceedings of Science 2016-September 巻 2016年

出版者・発行元：Proceedings of Science

Neutrons can be accelerate and/or decelerate by using spin flip in the magnetic field. Controlling the number of spin-flips in the series of flippers enables us to change the energy of the acceleration/deceleration. The distribution of velocity of these neutrons can be concentrated by accelerating properly in the middle of the transport. The width of wavelength of the neutrons is compressed to improve the production of ultra-cold neutrons by superthermal method by using superfluid He-II. This has the advantage to improve the sensitivity of neutron EDM search.

DOI： 10.22323/1.281.0180

Development of time projection chamber for precise neutron lifetime measurement using pulsed cold neutron beams Open Access

Arimoto, Y; Higashi, N; Igarashi, Y; Iwashita, Y; Ino, T; Katayama, R; Kitaguchi, M; Kitahara, R; Matsumura, H; Mishima, K; Nagakura, N; Oide, H; Otono, H; Sakakibara, R; Shima, T; Shimizu, HM; Sugino, T; Sumi, N; Sumino, H; Taketani, K; Tanaka, G; Tanaka, M; Tauchi, K; Toyoda, A; Tomita, T; Yamada, T; Yamashita, S; Yokoyama, H; Yoshioka, T

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 799 巻頁： 187 - 196 2015年11月

出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

A new time projection chamber (TPC) was developed for neutron lifetime measurement using a pulsed cold neutron spallation source at the Japan Proton Accelerator Research Complex (J-PARC). Managing considerable background events from natural sources and the beam radioactivity is a challenging aspect of this measurement. To overcome this problem, the developed TPC has unprecedented features such as the use of polyether-ether-ketone plates in the support structure and internal surfaces covered with <sup>6</sup>Li-enriched tiles to absorb outlier neutrons. In this paper, the design and performance of the new TPC are reported in detail.

DOI： 10.1016/j.nima.2015.08.006

Performances of JEM-EUSO: angular reconstruction: The JEM-EUSO Collaboration Open Access

Adams J.H., Ahmad S., Albert J.N., Allard D., Anchordoqui L., Andreev V., Anzalone A., Arai Y., Asano K., Ave Pernas M., Baragatti P., Barrillon P., Batsch T., Bayer J., Bechini R., Belenguer T., Bellotti R., Belov K., Berlind A.A., Bertaina M., Biermann P.L., Biktemerova S., Blaksley C., Blanc N., Błȩcki J., Blin-Bondil S., Blümer J., Bobik P., Bogomilov M., Bonamente M., Briggs M.S., Briz S., Bruno A., Cafagna F., Campana D., Capdevielle J.N., Caruso R., Casolino M., Cassardo C., Castellinic G., Catalano C., Catalano G., Cellino A., Chikawa M., Christl M.J., Cline D., Connaughton V., Conti L., Cordero G., Crawford H.J., Cremonini R., Csorna S., Dagoret-Campagne S., de Castro A.J., De Donato C., de la Taille C., De Santis C., del Peral L., Dell’Oro A., De Simone N., Di Martino M., Distratis G., Dulucq F., Dupieux M., Ebersoldt A., Ebisuzaki T., Engel R., Falk S., Fang K., Fenu F., Fernández-Gómez I., Ferrarese S., Finco D., Flamini M., Fornaro C., Franceschi A., Fujimoto J., Fukushima M., Galeotti P., Garipov G., Geary J., Gelmini G., Giraudo G., Gonchar M., González Alvarado C., Gorodetzky P., Guarino F., Guzmán A., Hachisu Y., Harlov B., Haungs A., Hernández Carretero J., Higashide K., Ikeda D., Ikeda H., Inoue N., Inoue S., Insolia A., Isgrò F.

Experimental Astronomy 40 巻 ( 1 ) 頁： 153 - 177 2015年11月

出版者・発行元：Experimental Astronomy

Mounted on the International Space Station(ISS), the Extreme Universe Space Observatory, on-board the Japanese Experimental Module (JEM-EUSO), relies on the well established fluorescence technique to observe Extensive Air Showers (EAS) developing in the earth’s atmosphere. Focusing on the detection of Ultra High Energy Cosmic Rays (UHECR) in the decade of 10<sup>20</sup>eV, JEM-EUSO will face new challenges by applying this technique from space. The EUSO Simulation and Analysis Framework (ESAF) has been developed in this context to provide a full end-to-end simulation frame, and assess the overall performance of the detector. Within ESAF, angular reconstruction can be separated into two conceptually different steps. The first step is pattern recognition, or filtering, of the signal to separate it from the background. The second step is to perform different types of fitting in order to search for the relevant geometrical parameters that best describe the previously selected signal. In this paper, we discuss some of the techniques we have implemented in ESAF to perform the geometrical reconstruction of EAS seen by JEM-EUSO. We also conduct thorough tests to assess the performances of these techniques in conditions which are relevant to the scope of the JEM-EUSO mission. We conclude by showing the expected angular resolution in the energy range that JEM-EUSO is expected to observe.

DOI： 10.1007/s10686-013-9371-0

Calibration aspects of the JEM-EUSO mission Open Access

Adams, JH Jr; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Baragatti, P; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; de Donato, C; de la Taille, C; de Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Higashide, K; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itow, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodriguez, I; Rodríguez, MD; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Cruz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 91 - 116 2015年11月

出版者・発行元：Experimental Astronomy

The JEM-EUSO telescope will be, after calibration, a very accurate instrument which yields the number of received photons from the number of measured photo-electrons. The project is in phase A (demonstration of the concept) including already operating prototype instruments, i.e. many parts of the instrument have been constructed and tested. Calibration is a crucial part of the instrument and its use. The focal surface (FS) of the JEM-EUSO telescope will consist of about 5000 photo-multiplier tubes (PMTs), which have to be well calibrated to reach the required accuracy in reconstructing the air-shower parameters. The optics system consists of 3 plastic Fresnel (double-sided) lenses of 2.5 m diameter. The aim of the calibration system is to measure the efficiencies (transmittances) of the optics and absolute efficiencies of the entire focal surface detector. The system consists of 3 main components: (i) Pre-flight calibration devices on ground, where the efficiency and gain of the PMTs will be measured absolutely and also the transmittance of the optics will be. (ii) On-board relative calibration system applying two methods: a) operating during the day when the JEM-EUSO lid will be closed with small light sources on board. b) operating during the night, together with data taking: the monitoring of the background rate over identical sites. (iii) Absolute in-flight calibration, again, applying two methods: a) measurement of the moon light, reflected on high altitude, high albedo clouds. b) measurements of calibrated flashes and tracks produced by the Global Light System (GLS). Some details of each calibration method will be described in this paper.

DOI： 10.1007/s10686-015-9453-2

Space experiment TUS on board the Lomonosov satellite as pathfinder of JEM-EUSO Open Access

Adams, JH Jr; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Baragatti, P; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Higashide, K; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itow, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Crúz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 315 - 326 2015年11月

出版者・発行元：Experimental Astronomy

Space-based detectors for the study of extreme energy cosmic rays (EECR) are being prepared as a promising new method for detecting highest energy cosmic rays. A pioneering space device – the “tracking ultraviolet set-up” (TUS) – is in the last stage of its construction and testing. The TUS detector will collect preliminary data on EECR in the conditions of a space environment, which will be extremely useful for planning the major JEM-EUSO detector operation.

DOI： 10.1007/s10686-015-9465-y

Science of atmospheric phenomena with JEM-EUSO Open Access

Adams, JH Jr; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Baragatti, P; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Higashide, K; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itow, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sanchez, S; Santangelo, A; Cruz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galiciaga, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 239 - 251 2015年11月

出版者・発行元：Experimental Astronomy

The main goal of the JEM-EUSO experiment is the study of Ultra High Energy Cosmic Rays (UHECR, 10<sup>19</sup>−10<sup>21</sup>eV), but the method which will be used (detection of the secondary light emissions induced by cosmic rays in the atmosphere) allows to study other luminous phenomena. The UHECRs will be detected through the measurement of the emission in the range between 290 and 430 m, where some part of Transient Luminous Events (TLEs) emission also appears. This work discusses the possibility of using the JEM-EUSO Telescope to get new scientific results on TLEs. The high time resolution of this instrument allows to observe the evolution of TLEs with great precision just at the moment of their origin. The paper consists of four parts: review of the present knowledge on the TLE, presentation of the results of the simulations of the TLE images in the JEM-EUSO telescope, results of the Russian experiment Tatiana–2 and discussion of the possible progress achievable in this field with JEM-EUSO as well as possible cooperation with other space projects devoted to the study of TLE – TARANIS and ASIM. In atmospheric physics, the study of TLEs became one of the main physical subjects of interest after their discovery in 1989. In the years 1992 – 1994 detection was performed from satellite, aircraft and space shuttle and recently from the International Space Station. These events have short duration (milliseconds) and small scales (km to tens of km) and appear at altitudes 50 – 100 km. Their nature is still not clear and each new experimental data can be useful for a better understanding of these mysterious phenomena.

DOI： 10.1007/s10686-014-9431-0

The atmospheric monitoring system of the JEM-EUSO instrument Open Access

Adams, JH Jr; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Baragatti, P; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Higashide, K; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itow, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prevot, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Crúz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, J; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 45 - 60 2015年11月

出版者・発行元：Experimental Astronomy

The JEM-EUSO telescope will detect Ultra-High Energy Cosmic Rays (UHECRs) from space, detecting the UV Fluorescence Light produced by Extensive Air Showers (EAS) induced by the interaction of the cosmic rays with the earth’s atmosphere. The capability to reconstruct the properties of the primary cosmic ray depends on the accurate measurement of the atmospheric conditions in the region of EAS development. The Atmospheric Monitoring (AM) system of JEM-EUSO will host a LIDAR, operating in the UV band, and an Infrared camera to monitor the cloud cover in the JEM-EUSO Field of View, in order to be sensitive to clouds with an optical depth τ ≥ 0.15 and to measure the cloud top altitude with an accuracy of 500 m and an altitude resolution of 500 m.

DOI： 10.1007/s10686-014-9378-1

Ultra high energy photons and neutrinos with JEM-EUSO (vol 40, pg 215, 2015) Open Access

Adams, JH; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Baragatti, P; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Higashide, K; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgr'o, F; Itow, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Crúz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, AD; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 235 - 237 2015年11月

Ultra high energy photons and neutrinos with JEM-EUSO Open Access

Supanitsky, AD; Medina-Tanco, G; Guzmán, A; Adams, JH ; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchari, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itowen, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Crúz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Odarczyk, ZW; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 215 - 233 2015年11月

出版者・発行元：Experimental Astronomy

Ultra high energy photons and neutrinos are carriers of very important astrophysical information. They may be produced at the sites of cosmic ray acceleration or during the propagation of the cosmic rays in the intergalactic medium. In contrast to charged cosmic rays, photon and neutrino arrival directions point to the production site because they are not deflected by the magnetic fields of the Galaxy or the intergalactic medium. In this work we study the characteristics of the longitudinal development of showers initiated by photons and neutrinos at the highest energies. These studies are relevant for development of techniques for neutrino and photon identification by the JEM-EUSO telescope. In particular, we study the possibility of observing the multi-peak structure of very deep horizontal neutrino showers with JEM-EUSO. We also discuss the possibility to determine the flavor content of the incident neutrino flux by taking advantage of the different characteristics of the longitudinal profiles generated by different type of neutrinos. This is of grate importance for the study of the fundamental properties of neutrinos at the highest energies. Regarding photons, we discuss the detectability of the cosmogenic component by JEM-EUSO and also estimate the expected upper limits on the photon fraction which can be obtained from the future JEM-EUSO data for the case in which there are no photons in the samples.

DOI： 10.1007/s10686-013-9353-2

The JEM-EUSO observation in cloudy conditions Open Access

Adams, JH Jr; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Baragatti, P; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornarodo, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Higashide, K; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itow, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircakja, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Crúz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 135 - 152 2015年11月

出版者・発行元：Experimental Astronomy

The JEM-EUSO (Extreme Universe Space Observatory on-board the Japanese Experiment Module) mission will conduct extensive air shower (EAS) observations on the International Space Station (ISS). Following the ISS orbit, JEM-EUSO will experience continuous changes in the atmospheric conditions, including cloud presence. The influence of clouds on space-based observation is, therefore, an important topic to investigate from both EAS property and cloud climatology points of view. In the present work, the impact of clouds on the apparent profile of EAS is demonstrated through the simulation studies, taking into account the JEM-EUSO instrument and properties of the clouds. These results show a dependence on the cloud-top altitude and optical depth of the cloud. The analyses of satellite measurements on the cloud distribution indicate that more than 60 % of the cases allow for conventional EAS observation, and an additional ∼20 % with reduced quality. The combination of the relevant factors results in an effective trigger aperture of EAS observation ∼72 %, compared to the one in the clear atmosphere condition.

DOI： 10.1007/s10686-014-9377-2

The JEM-EUSO mission: An introduction Open Access

Adams, JH Jr; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Baragatti, P; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; de Donato, C; de la Taille, C; Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Higashide, K; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itow, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; Ríos, JAMD; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Crúz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 3 - 17 2015年11月

出版者・発行元：Experimental Astronomy

The Extreme Universe Space Observatory on board the Japanese Experiment Module of the International Space Station, JEM-EUSO, is being designed to search from space ultra-high energy cosmic rays. These are charged particles with energies from a few 10<sup>19</sup> eV to beyond 10<sup>20</sup> eV, at the very end of the known cosmic ray energy spectrum. JEM-EUSO will also search for extreme energy neutrinos, photons, and exotic particles, providing a unique opportunity to explore largely unknown phenomena in our Universe. The mission, principally based on a wide field of view (60 degrees) near-UV telescope with a diameter of ∼ 2.5 m, will monitor the earth’s atmosphere at night, pioneering the observation from space of the ultraviolet tracks (290-430 nm) associated with giant extensive air showers produced by ultra-high energy primaries propagating in the earth’s atmosphere. Observing from an orbital altitude of ∼ 400 km, the mission is expected to reach an instantaneous geometrical aperture of A<inf>geo</inf> ≥ 2 × 10<sup>5</sup> km<sup>2</sup> sr with an estimated duty cycle of ∼ 20 %. Such a geometrical aperture allows unprecedented exposures, significantly larger than can be obtained with ground-based experiments. In this paper we briefly review the history of space-based search for ultra-high energy cosmic rays. We then introduce the special issue of Experimental Astronomy devoted to the various aspects of such a challenging enterprise. We also summarise the activities of the on-going JEM-EUSO program.

DOI： 10.1007/s10686-015-9482-x

The JEM-EUSO instrument Open Access

Casolino, M; Kajino, F; Piotrowski, LW; Adams, JH ; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchari, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itowen, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Crúz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Odarczyk, ZW; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 19 - 44 2015年11月

出版者・発行元：Experimental Astronomy

In this paper we describe the main characteristics of the JEM-EUSO instrument. The Extreme Universe Space Observatory on the Japanese Experiment Module (JEM-EUSO) of the International Space Station (ISS) will observe Ultra High-Energy Cosmic Rays (UHECR) from space. It will detect UV-light of Extensive Air Showers (EAS) produced by UHECRs traversing the Earth’s atmosphere. For each event, the detector will determine the energy, arrival direction and the type of the primary particle. The advantage of a space-borne detector resides in the large field of view, using a target volume of about 10<sup>12</sup> tons of atmosphere, far greater than what is achievable from ground. Another advantage is a nearly uniform sampling of the whole celestial sphere. The corresponding increase in statistics will help to clarify the origin and sources of UHECRs and characterize the environment traversed during their production and propagation. JEM-EUSO is a 1.1 ton refractor telescope using an optics of 2.5 m diameter Fresnel lenses to focus the UV-light from EAS on a focal surface composed of about 5,000 multi-anode photomultipliers, for a total of ≃3⋅10<sup>5</sup> channels. A multi-layer parallel architecture handles front-end acquisition, selecting and storing valid triggers. Each processing level filters the events with increasingly complex algorithms using FPGAs and DSPs to reject spurious events and reduce the data rate to a value compatible with downlink constraints.

DOI： 10.1007/s10686-014-9418-x

The infrared camera onboard JEM-EUSO Open Access

Adams, JH Jr; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Baragatti, P; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Higashide, K; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itow, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Crúz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashini, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotovi, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 61 - 89 2015年11月

出版者・発行元：Experimental Astronomy

The Extreme Universe Space Observatory on the Japanese Experiment Module (JEM-EUSO) on board the International Space Station (ISS) is the first space-based mission worldwide in the field of Ultra High-Energy Cosmic Rays (UHECR). For UHECR experiments, the atmosphere is not only the showering calorimeter for the primary cosmic rays, it is an essential part of the readout system, as well. Moreover, the atmosphere must be calibrated and has to be considered as input for the analysis of the fluorescence signals. Therefore, the JEM-EUSO Space Observatory is implementing an Atmospheric Monitoring System (AMS) that will include an IR-Camera and a LIDAR. The AMS Infrared Camera is an infrared, wide FoV, imaging system designed to provide the cloud coverage along the JEM-EUSO track and the cloud top height to properly achieve the UHECR reconstruction in cloudy conditions. In this paper, an updated preliminary design status, the results from the calibration tests of the first prototype, the simulation of the instrument, and preliminary cloud top height retrieval algorithms are presented.

DOI： 10.1007/s10686-014-9402-5

The EUSO-Balloon pathfinder Open Access

Adams, JH Jr; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchari, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itowen, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Crúz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Odarczyk, ZW; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 281 - 299 2015年11月

出版者・発行元：Experimental Astronomy

EUSO-Balloon is a pathfinder for JEM-EUSO, the Extreme Universe Space Observatory which is to be hosted on-board the International Space Station. As JEM-EUSO is designed to observe Ultra-High Energy Cosmic Rays (UHECR)-induced Extensive Air Showers (EAS) by detecting their ultraviolet light tracks “from above”, EUSO-Balloon is a nadir-pointing UV telescope too. With its Fresnel Optics and Photo-Detector Module, the instrument monitors a 50 km<sup>2</sup> ground surface area in a wavelength band of 290–430 nm, collecting series of images at a rate of 400,000 frames/sec. The objectives of the balloon demonstrator are threefold: a) perform a full end-to-end test of a JEM-EUSO prototype consisting of all the main subsystems of the space experiment, b) measure the effective terrestrial UV background, with a spatial and temporal resolution relevant for JEM-EUSO. c) detect tracks of ultraviolet light from near space for the first time. The latter is a milestone in the development of UHECR science, paving the way for any future space-based UHECR observatory. On August 25, 2014, EUSO-Balloon was launched from Timmins Stratospheric Balloon Base (Ontario, Canada) by the balloon division of the French Space Agency CNES. From a float altitude of 38 km, the instrument operated during the entire astronomical night, observing UV-light from a variety of ground-covers and from hundreds of simulated EASs, produced by flashers and a laser during a two-hour helicopter under-flight.

DOI： 10.1007/s10686-015-9467-9

Ground-based tests of JEM-EUSO components at the Telescope Array site, "EUSO-TA" Open Access

Kawasaki, Y; Piotrowski, LW; Adams, JH ; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Baragatti, P; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; de Donato, C; de la Taille, C; Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Higashide, K; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itow, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; Ríos, JAMD; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Crúz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 301 - 314 2015年11月

出版者・発行元：Experimental Astronomy

We are conducting tests of optical and electronics components of JEMEUSO at the Telescope Array site in Utah with a ground-based “EUSO-TA” detector. The tests will include an engineering validation of the detector, cross-calibration of EUSO-TA with the TA fluorescence detector and observations of air shower events. Also, the proximity of the TA’s Electron Light Source will allow for convenient use of this calibration device. In this paper, we report initial results obtained with the EUSO-TA telescope.

DOI： 10.1007/s10686-015-9441-6

Performances of JEM-EUSO: energy and <i>X</i> <sub>max</sub> reconstruction Open Access

Adams, JH Jr; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Baragatti, P; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Higashide, K; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itow, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JA; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Cruz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 183 - 214 2015年11月

出版者・発行元：Experimental Astronomy

The Extreme Universe Space Observatory (EUSO) on–board the Japanese Experimental Module (JEM) of the International Space Station aims at the detection of ultra high energy cosmic rays from space. The mission consists of a UV telescope which will detect the fluorescence light emitted by cosmic ray showers in the atmosphere. The mission, currently developed by a large international collaboration, is designed to be launched within this decade. In this article, we present the reconstruction of the energy of the observed events and we also address the X<inf>max</inf> reconstruction. After discussing the algorithms developed for the energy and X<inf>max</inf> reconstruction, we present several estimates of the energy resolution, as a function of the incident angle, and energy of the event. Similarly, estimates of the X<inf>max</inf> resolution for various conditions are presented.

DOI： 10.1007/s10686-014-9427-9

Performances of JEM-EUSO: angular reconstruction (vol 30, pg 153, 2015) Open Access

Adams, JH Jr; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Baragatti, P; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csoma, S; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fern'andez-G'omez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Higashide, K; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgr'o, F; Itow, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; L'opez, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los R'ios, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orlea'nski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Pr'evot, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodr'iguez, I; Fr'ias, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczy'nski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; S'anchez, S; Santangelo, A; Cr'uz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; L'opez, HHS; Sledd, J; Slomi'nska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Vald'es-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villasenor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 179 - 181 2015年11月

JEM-EUSO: Meteor and nuclearite observations Open Access

Bertaina, M; Cellino, A; Ronga, F; Adams, JH ; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchari, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itowen, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Crúz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Odarczyk, ZW; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 253 - 279 2015年11月

出版者・発行元：Experimental Astronomy

Meteor and fireball observations are key to the derivation of both the inventory and physical characterization of small solar system bodies orbiting in the vicinity of the Earth. For several decades, observation of these phenomena has only been possible via ground-based instruments. The proposed JEM-EUSO mission has the potential to become the first operational space-based platform to share this capability. In comparison to the observation of extremely energetic cosmic ray events, which is the primary objective of JEM-EUSO, meteor phenomena are very slow, since their typical speeds are of the order of a few tens of km/sec (whereas cosmic rays travel at light speed). The observing strategy developed to detect meteors may also be applied to the detection of nuclearites, which have higher velocities, a wider range of possible trajectories, but move well below the speed of light and can therefore be considered as slow events for JEM-EUSO. The possible detection of nuclearites greatly enhances the scientific rationale behind the JEM-EUSO mission.

DOI： 10.1007/s10686-014-9375-4

JEM-EUSO observational technique and exposure Open Access

Bertaina, M; Bobik, P; Fenu, F; Shinozaki, K; Adams, JH ; Ahmad, S; Albert, JN; Allard, D; Anchordoqui, L; Andreev, V; Anzalone, A; Arai, Y; Asano, K; Pernas, MA; Barrillon, P; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Blanc, N; Blecki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Christl, MJ; Cline, D; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Dell'Oro, A; De Simone, N; Di Martino, M; Distratis, G; Dulucq, F; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Franceschi, A; Fujimoto, J; Fukushima, M; Galeotti, P; Garipov, G; Geary, J; Gelmini, G; Giraudo, G; Gonchari, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itowen, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Maravilla, D; Marcelli, L; Marini, A; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Panasyuk, MI; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Cano, SP; Peter, T; Picozza, P; Pierog, T; Piotrowski, LW; Piraino, S; Plebaniak, Z; Pollini, A; Prat, P; Prévôt, G; Prieto, H; Putis, M; Reardon, P; Reyes, M; Ricci, M; Rodríguez, I; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sánchez, S; Santangelo, A; Crúz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; López, HHS; Sledd, J; Slominska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Trillaud, F; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Odarczyk, ZW; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zotov, MY; Marchi, AZ

EXPERIMENTAL ASTRONOMY 40 巻 ( 1 ) 頁： 117 - 134 2015年11月

出版者・発行元：Experimental Astronomy

Designed as the first mission to explore the ultra-high energy universe from space, JEM-EUSO observes the Earth’s atmosphere at night to record the ultraviolet tracks generated by the extensive air showers. We present the expected geometrical aperture and annual exposure in the nadir and tilt modes for ultra-high energy cosmic rays observation as a function of the altitude of the International Space Station.

DOI： 10.1007/s10686-014-9376-3

21aCE-11 中性子を用いた基礎物理 : 共鳴吸収反応でのCP対称性の破れの探索 Open Access

北口雅暁, 清水裕彦, 広田克也, 市川豪, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 日野正裕, 吉岡瑞樹, 嶋達志, 山形豊

日本物理学会講演概要集 70.1 巻 ( 0 ) 頁： 254 2015年

26aSF-4 BGO 単結晶による回折を利用した中性子電気双極子モーメントの測定 Open Access

伊藤茂康, 北口雅暁, 清水裕彦

日本物理学会講演概要集 70.2 巻 ( 0 ) 頁： 250 2015年

21pDF-11 複合核共鳴におけるCP非保存効果の増幅効果を利用した新物理探索 Open Access

清水裕彦, 北口雅暁, 広田克也, 市川豪, 猪野隆, 旭耕一郎, 百瀬孝昌, 岩田高広, 酒井健二, 日野正裕, 吉岡瑞樹, 嶋達志, 山形豊

日本物理学会講演概要集 70.1 巻 ( 0 ) 頁： 70 2015年

21aDL-6 冷中性子を用いた中性子反中性子振動探索実験のための光学系 Open Access

市川豪, 清水裕彦, 北口雅暁

日本物理学会講演概要集 70.1 巻 ( 0 ) 頁： 66 2015年

21aDL-4 重力起因位相測定のための多層膜中性子干渉計の開発 Open Access

關義親, 北口雅暁, 日野正裕, 清水裕彦

日本物理学会講演概要集 70.1 巻 ( 0 ) 頁： 64 2015年

21aDL-3 J-PARC/BL05における中性子寿命測定実験の系統誤差の評価 Open Access

北原龍之介, 岩下芳久, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 山田崇人, 片山領, 東直, 横山晴道, 角野浩史, 山下了, 田中元気, 角直幸, 音野瑛俊, 吉岡瑞樹, 生出秀行, 関義親, 三島賢二, 竹谷薫, 猪野隆, 嶋達志

日本物理学会講演概要集 70.1 巻 ( 0 ) 頁： 63 2015年

21aDL-2 J-PARC/BL05における中性子寿命測定実験 : 2014年データ解析 Open Access

角直幸, 田中元気, 音野瑛俊, 吉岡瑞樹, 北原龍之介, 岩下芳久, 山田崇人, 片山領, 東直, 横山晴道, 角野浩史, 山下了, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 生出秀行, 関義親, 嶋達志, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 70.1 巻 ( 0 ) 頁： 62 2015年

21aDL-1 J-PARC/BL05における中性子寿命測定実験の現状 Open Access

田中元気, 角直幸, 吉岡瑞樹, 音野瑛俊, 北原龍之介, 岩下芳久, 山田崇人, 片山領, 東直, 横山晴道, 角野浩史, 山下了, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 生出秀行, 関義親, 嶋達志, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 70.1 巻 ( 0 ) 頁： 61 2015年

21aCE-12 CP非保存研究のための複合核における部分波混合核の測定 Open Access

広田克也, 北口雅暁, 清水裕彦, 市川豪, 杉野智昭, 酒井健二, 木村敦, 原田秀郎, 猪野隆

日本物理学会講演概要集 70.1 巻 ( 0 ) 頁： 255 2015年

26pSG-8 J-PARC/BL05における中性子寿命測定実験 : 新検出器開発 Open Access

角直幸, 富田龍彦, 音野瑛俊, 吉岡瑞樹, 北原龍之介, 岩下芳久, 山田崇人, 山下了, 広田克也, 清水裕彦, 北口雅暁, 生出秀行, 嶋達志, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 70.2 巻 ( 0 ) 頁： 87 2015年

26pSS-1 J-PARC/BL05における中性子寿命測定実験 : シミュレーションによる系統誤差の評価 Open Access

長倉直樹, 片山領, 山田崇人, 東直, 横山晴道, 角野浩史, 山下了, 清水裕彦, 広田克也, 榊原理紗, 杉野智昭, 北口雅暁, 吉岡瑞樹, 音野瑛俊, 田中元気, 角直幸, 岩下芳久, 北原龍之介, 生出秀行, 嶋達志, 三島賢二, 猪野隆, 竹谷薫, 関義親

日本物理学会講演概要集 70.2 巻 ( 0 ) 頁： 88 2015年

Development of accelerator-driven compact neutron sources Open Access

Hirota K., Ichikawa G., Kitaguchi M., Kiyanagi Y., Shimizu H.M., Tsuchida K., Uritani A., Watanabe K.

6th International Particle Accelerator Conference Ipac 2015 頁： 2535 - 2536 2015年

The development of a low energy neutron accelerator for rebunching pulsed neutrons Open Access

Imajo S., Iwashita Y., Shimizu H.M., Kitaguchi M., Yamashita S., Arimoto Y., Yoshioka T., Seki Y.

Ipac 2014 Proceedings of the 5th International Particle Accelerator Conference 頁： 751 - 753 2014年7月

出版者・発行元：Ipac 2014 Proceedings of the 5th International Particle Accelerator Conference

Low energy neutrons can be accelerated or decelerated by the technique of AFP-NMR with RF in a gradient magnetic fields. The neutrons have magnetic moments, hence their potential energy are not cancelled before and after passage of magnetic fields and their kinetic energy change finally when their spins are flipped in the fields. Nowadays most measurements of the neutron electric dipole moment (nEDM) are carried out with ultra cold neutrons (UCN), whose kinetic energies are lower than about 300 neV, and with a small storage bottle to reduce the systematic errors. In such experiments highly dense UCNs are desired. The spallation neutron sources generate high-density neutrons at the target, however, the pulsed neutrons with spread velocities are diffused in guide tubes during long beam transport. It is necessary to concentrate UCN temporally upon the bottle by controlling their velocities for nEDM experiments at those facilities. We demonstrated such rebuncher and have been developed the advanced apparatus which makes it possible to handle broader energy range UCN. The design, measured specification of the new rebuncher is described in detail.

DOI： 10.18429/JACoW-IPAC2014-MOPRI065

Production of Ultra Cold Neutrons by a Doppler Shifter with Pulsed Neutrons at J-PARC Open Access

Mishima K., Imajo S., Hino M., Ino T., Iwashita Y., Katayama R., Kitaguchi M., Oda T., Shimizu H. M., Utsuro M., Yamashita S., Yoshioka T.

INTERNATIONAL WORKSHOP ON NEUTRON OPTICS AND DETECTORS (NOP&D 2013) 528 巻 ( 1 ) 2014年

出版者・発行元：Journal of Physics: Conference Series

Ultracold neutrons (UCNs) are neutrons whose kinetic energy is around a few hundred nanoelectronvolts. Neutrons with such small kinetic energy can be trapped in a material vessel or magnetic fields. Because of these unique characteristics, UCNs are used for some important experiments of fundamental physics. The Doppler shifter is a device to produce UCN by slowing them down by the reflection on a mirror moving with half of the velocity of incoming neutrons. A Doppler shifter using a quadruple-stack of monochromatic supermirrors that reflects neutrons with a velocity around 68m/s [1, Hino et al.(2010)] was fabricated, and operated with a pulsed neutron source of J-PARC. An important feature of the Doppler shifter is the use of a pulsed neutron beam. Unlike in continuous neutron beams, the neutron velocity can be selected by choosing a time slice in a pulsed neutron bunch. Thus the UCN production improves by ∼80 times in the case of J-PARC. We successfully produced the UCNs by the Doppler shifter: the measured UCN production rate is consistent with the simulations. © Published under licence by IOP Publishing Ltd.

DOI： 10.1088/1742-6596/528/1/012030

18aSJ-1 J-PARC/BL05中性子寿命測定実験 : 中性子フラックスの決定(18aSJ 中性子・ニュートリノ,素粒子実験領域) Open Access

三島賢二, 山下了, 山田崇人, 片山領, 東直, 横山晴道, 角野浩史, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 田中元気, 角直幸, 音野瑛俊, 吉岡瑞樹, 北原龍之介, 岩下芳久, 生出秀行, 嶋達志, 関義親, 猪野隆, 竹谷薫

日本物理学会講演概要集 69.2.1 巻 ( 0 ) 頁： 18 2014年

18aSJ-2 J-PARC/BL05中性子寿命実験 : TPC検出器の改良及び評価(18aSJ 中性子・ニュートリノ,素粒子実験領域) Open Access

北原龍之介, 岩下芳久, 山田崇人, 片山領, 東直, 横山晴道, 角野浩史, 三島賢二, 山下了, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 田中元気, 角直幸, 音野瑛俊, 吉岡瑞樹, 生出秀行, 関義親, 嶋達志, 竹谷薫, 猪野隆

日本物理学会講演概要集 69.2.1 巻 ( 0 ) 頁： 18 2014年

28aTR-7 J-PARC/BL05中性子寿命測定実験 : 現状と展望(28aTR 実験核物理領域,ビーム物理領域,素粒子実験領域合同,J-PARCと原子核素粒子実験(合同),実験核物理領域) Open Access

三島賢二, 山下了, 山田崇人, 片山領, 東直, 横山晴道, 角野浩史, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 田中元気, 音野瑛俊, 吉岡瑞樹, 生出秀行, 猪野隆, 竹谷薫, 嶋達志, 関義親

日本物理学会講演概要集 69.1.1 巻 ( 0 ) 頁： 87 2014年

29pSD-7 J-PARC/BL05中性子寿命測定実験におけるイベント同定に伴う系統誤差の理解と今後の展望(29pSD ニュートリノ振動,中性子,素粒子実験領域) Open Access

山田崇人, 横山晴道, 東直, 片山領, 角野浩史, 三島賢二, 山下了, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 田中元気, 音野瑛俊, 吉岡瑞樹, 生出秀行, 関義親, 猪野隆, 竹谷薫, 嶋達志

日本物理学会講演概要集 69.1.1 巻 ( 0 ) 頁： 36 2014年

29pSD-6 J-PARC/BL05中性子寿命測定実験の入射フラックス測定の安定性とその系統誤差の評価(29pSD ニュートリノ振動,中性子,素粒子実験領域) Open Access

榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 東直, 横山晴道, 山田崇人, 片山領, 角野浩史, 三島賢二, 山下了, 田中元気, 音野瑛俊, 吉岡瑞樹, 生出秀行, 関義親, 猪野隆, 竹谷薫, 嶋達志

日本物理学会講演概要集 69.1.1 巻 ( 0 ) 頁： 36 2014年

29pSD-5 J-PARC/BL05中性子寿命測定実験の現状(29pSD ニュートリノ振動,中性子,素粒子実験領域) Open Access

北口雅暁, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 横山晴道, 東直, 山田崇人, 片山領, 角野浩史, 三島賢二, 山下了, 田中元気, 音野瑛俊, 吉岡瑞樹, 生出秀行, 関義親, 猪野隆, 竹谷薫, 嶋達志

日本物理学会講演概要集 69.1.1 巻 ( 0 ) 頁： 36 2014年

Concepts of Neutron Polarisation Analysis Devices for a New Neutron Chopper Spectrometer, POLANO, in J-PARC Open Access

Ohoyama K., Yokoo T., Itoh S., Ino T., Ohkawara M., Oku T., Tasaki S., Iwasa K., Sato T. J., Ishimoto S., Taketani K., Kira H., Sakaguch Y., Nanbu M., Hiraka H., Shimizu H. M., Takeda M., Hino M., Hayashi K., Fliges U., Hautle P.

1ST CONFERENCE ON LIGHT AND PARTICLE BEAMS IN MATERIALS SCIENCE 2013 (LPBMS2013) 502 巻 ( 1 ) 2014年

Development of a new neutron mirror made of deuterated Diamond-like carbon Open Access

Sakurai Dai, Chiba Junsei, Ino Takashi, Kakusho Nobunori, Kaneko Naokatsu, Katayama Ryo, Kitaguchi Masaaki, Mishima Kenji, Muto Suguru, Ozeki Kazuhide, Seki Yoshichika, Shimizu Hirohiko M., Yamashita Satoru, Yoshioka Tamaki, Nishimura Daiki

INTERNATIONAL WORKSHOP ON NEUTRON OPTICS AND DETECTORS (NOP&D 2013) 528 巻 ( 1 ) 2014年

出版者・発行元：Journal of Physics: Conference Series

We developed a new neutron mirror made of Diamond-like carbon (DLC). DLC is a film of amorphous carbon that has characteristics of both diamond and graphite. We produced DLC mirrors by ionization deposition method which is one of the chemical vapor deposition (CVD). Generally, DLC made by CVD contents a few tens of percentages of hydrogen. It decreases the Fermi potential of the DLC coating because hydrogen has negative Fermi potential. In order to increase the Fermi potential of the coating, we deuterated the DLC by using deuterated benzene for the source gas. The characteristics of the deuterated DLC(DDLC) coating was evaluated by RBS, ERDA, x-ray reflectivity, AFM. As a result, DDLC coating has 243neV due to deuteration, which is the same level as Ni. The RMS of height of the DDLC was 0.6nm so that the DDLC coating can be applied for a focusing mirror or specular transportation of pulsed neutron. Besides, we also develop Hydrogen/Deuterium DLC multiple layer mirror. So far, 4 layers mirror has been succeeded. © Published under licence by IOP Publishing Ltd.

DOI： 10.1088/1742-6596/528/1/012010

Rebunching ultracold neutrons by magnetic deceleration for the neutron edm experimental at J-parc Open Access

Imajo S., Iwashita Y., Geltenbort P., Arimoto Y., Shimizu H.M., Kitaguchi M., Yoshioka T., Seki Y.

Ipac 2013 Proceedings of the 4th International Particle Accelerator Conference 頁： 1187 - 1189 2013年12月

出版者・発行元：Ipac 2013 Proceedings of the 4th International Particle Accelerator Conference

Ultra cold neutrons (UCN), which have energies less than 300 neV, can be accelerated or decelerated by controlling static magnetic and RF fields. Neutron kinetic energies can inclease or declease when their spin flip. This method can be used to rebunch a pulsed beam of neutrons to a storage bottle that can store UCN with high density. High UCN densities can be achieved for precision measurements of neutron properties such as the Electric Dipole Moment. The results of a recent rst test experiments and present status of our development are reported.

Type-II entry of solar wind protons into the lunar wake: Effects of magnetic connection to the night-side surface

Nishino, MN; Fujimoto, M; Saito, Y; Tsunakawa, H; Kasahara, Y; Kawamura, M; Matsushima, M; Takahashi, F; Shibuya, H; Shimizu, H; Goto, Y; Hashimoto, K; Omura, Y; Kumamoto, A; Ono, T; Yokota, S

PLANETARY AND SPACE SCIENCE 87 巻頁： 106 - 114 2013年10月

出版者・発行元：Planetary and Space Science

Our recent observations around the Moon revealed that so-called type-II (T2) entry of the solar wind protons into the near-Moon wake occurs when the IMF is dominated by the non-radial components (i.e. BY and/or B z). Under this condition a part of the solar wind protons scattered/reflected at the lunar dayside surface subsequently enters the central region of the near-Moon wake after a large-scale cycloid motion, which accelerates electrons along the filed line into the wake. The situation handled in the previous studies is that the relevant magnetic field line is detached from the lunar surface, leaving a possibility of the T2 entry under magnetic connection left open. Here we report that the protons can access the central wake region that is magnetically connected to the lunar nightsicle surface, which we categorize into the T2 entry with magnetic connection to the lunar surface (T2MC). Furthermore we show that the energy of the electron beams induced by the proton entry into the wake depends on the magnetic connectivity. Strong electron acceleration (up to several hundred eV to 1 keV) along the magnetic field associated with the T2 entry is prominent when the field line has its both ends in the solar wind, that is, when the magnetic field is detached from the lunar surface (i.e. the previously reported T2 entry that we rename toT2MD). On the other hand, no significant electron acceleration is found in the T2MC cases, although an enhancement of the electron flux associated with the T2 proton entry is evident. We also report that the T2 entry process takes place even under radial (Bx-dominated) IMF condition. Our results indicate that, while the T2 entry of solar wind protons into the wake itself does not require a special IMF condition but is a rather general phenomenon, the characteristic energy of associated electrons does show a strong dependence on the magnetic connectivity to the lunar surface. © 2013 Elsevier Ltd.

DOI： 10.1016/j.pss.2013.08.017

An evaluation of the exposure in nadir observation of the JEM-EUSO mission Open Access

Adams, JH; Ahmad, S; Albert, JN; Allard, D; Ambrosio, M; Anchordoqui, L; Anzalone, A; Arai, Y; Aramo, C; Asano, K; Ave, M; Barrillon, P; Batsch, T; Bayer, J; Belenguer, T; Bellotti, R; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Biccki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, O; Cellino, A; Chikawa, M; Christi, MJ; Connaughton, V; Cortés, JF; Crawford, HJ; Cremonini, R; Csorna, S; D'Olivo, JC; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; del Peral, L; Dell'Oro, A; De Pascale, MP; Di Martino, M; Distratis, G; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Franceschi, A; Fujimoto, J; Galeotti, P; Garipov, G; Geary, J; Giaccari, UG; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Higashide, K; Iguchi, T; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itow, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Ko, SH; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kuznetsov, E; La Rosa, G; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Marcelli, L; Marini, A; Martin-Chassard, G; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Maurissen, A; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monnier-Ragaigne, D; de los Rios, JAM; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Nam, JW; Nam, S; Nam, K; Napolitano, T; Naumov, D; Neronov, A; Nomoto, K; Ogawa, T; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Pacheco, N; Panasyuk, MI; Parizot, E; Park, IH; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Peter, T; Picozza, P; Pollini, A; Prieto, H; Reardon, P; Reinabi, M; Reyes, M; Ricci, M; Rodriguez, I; Frias, MDR; Ronga, F; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sanchez, S; Santangelo, A; Cruz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Scuderi, M; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozigbio, G; López, HHS; Sledd, J; Slomiriska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tomida, T; Tone, N; Trillaud, F; Tsenov, R; Tsuno, K; Tymieniecka, T; Uchihori, Y; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zamora, A; Marchi, AZ

ASTROPARTICLE PHYSICS 44 巻頁： 76 - 90 2013年4月

出版者・発行元：Astroparticle Physics

We evaluate the exposure during nadir observations with JEM-EUSO, the Extreme Universe Space Observatory, on-board the Japanese Experiment Module of the International Space Station. Designed as a mission to explore the extreme energy Universe from space, JEM-EUSO will monitor the Earth's nighttime atmosphere to record the ultraviolet light from tracks generated by extensive air showers initiated by ultra-high energy cosmic rays. In the present work, we discuss the particularities of space-based observation and we compute the annual exposure in nadir observation. The results are based on studies of the expected trigger aperture and observational duty cycle, as well as, on the investigations of the effects of clouds and different types of background light. We show that the annual exposure is about one order of magnitude higher than those of the presently operating ground-based observatories. © 2013 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.astropartphys.2013.01.008

Basic Concepts of Polarisation Analysis for Neutron Chopper Spectrometer POLANO at J-PARC

Ohoyama, K; Yokoo, T; Itoh, S; Suzuki, J; Iwasa, K; Sato, TJ; Kira, H; Sakaguchi, Y; Ino, T; Oku, T; Tomiyasu, K; Matsuura, M; Hiraka, H; Fujita, M; Kimura, H; Sato, T; Suzuki, J; Shimizu, HM; Arima, T; Takeda, M; Kaneko, K; Hino, M; Muto, S; Nojiri, H; Lee, CH; Park, JG; Choi, S

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 82 巻 2013年1月

磁気レンズを用いた中性子線の制御技術とその応用

清水裕彦

精密工学会誌 79 巻 ( 9 ) 頁： 809 - 812 2013年

23pSD-3 J-PARCでの中性子EDM測定を目指したUCNリバンチャーの改良(中性子の物理,素粒子実験領域) Open Access

今城想平, 岩下芳久, 清水裕彦, 北口雅暁, 吉岡瑞樹, 有本靖, 関義親

日本物理学会講演概要集 68.2.1 巻 ( 0 ) 頁： 28 2013年

26aXZB-2 J-PARC偏極中性子散乱装置POLANO計画の状況(26aXZB 領域10,ビーム物理領域合同 X線・粒子線(中性子),ビーム物理領域) Open Access

大山研司, 横尾哲也, 伊藤晋一, 鈴木純一, 佐藤卓, 岩佐和晃, 吉良弘, 坂口佳史, 奥隆之, 猪野隆, 平賀晴弘, 松浦直人, 藤田全基, 富安啓輔, 木村宏之, 鈴木淳市, 清水裕彦, 有馬孝尚, 武田全康, 金子耕士, 日野正裕, 武藤豪, 野尻浩之

日本物理学会講演概要集 68.1.1 巻 ( 0 ) 頁： 146 2013年

26aXZB-2 J-PARC偏極中性子散乱装置POLANO計画の状況(26aXZB 領域10,ビーム物理領域合同 X線・粒子線(中性子),領域10(誘電体,格子欠陥,X線・粒子線,フォノン)) Open Access

大山研司, 横尾哲也, 伊藤晋一, 鈴木純一, 佐藤卓, 岩佐和晃, 吉良弘, 坂口佳史, 奥隆之, 猪野隆, 平賀晴弘, 松浦直人, 藤田全基, 富安啓輔, 木村宏之, 鈴木淳市, 清水裕彦, 有馬孝尚, 武田全康, 金子耕士, 日野正裕, 武藤豪, 野尻浩之

日本物理学会講演概要集 68.1.4 巻 ( 0 ) 頁： 1012 2013年

27pHC-13 中性子を用いた重力法則の検証(27pHC 実験核物理領域,素粒子実験領域,ビーム物理領域,理論核物理領域合同 J-PARCと原子核素粒子実験,実験核物理領域) Open Access

松本悟, 吉岡瑞樹, 清水裕彦, 嶋達志, 猪野隆, 北口雅暁, 三島賢二

日本物理学会講演概要集 68.1.1 巻 ( 0 ) 頁： 96 2013年

27aRF-2 J-PARC MLFにおける中性子ドップラーシフターのUCN出力増強(27aRF 素粒子実験領域,実験核物理領域,理論核物理領域,ビーム物理領域合同 J-PARCと原子核素粒子実験,素粒子実験領域) Open Access

今城想平, 岩下芳久, 清水裕彦, 吉岡瑞樹, 北口雅暁, 三島賢二, 猪野隆, 有本靖, 關義親

日本物理学会講演概要集 68.1.1 巻 ( 0 ) 頁： 29 2013年

Fundamental physics with slow neutrons Open Access

Shimizu H.

Proceedings of Science 2013-December 巻 2013年

出版者・発行元：Proceedings of Science

A neutron beamline for the study of the fundamental physics has been constructed at the spallation neutron source of the Japan Proton Accelerator Research Complex (J-PARC). In-flight measurement of the neutron lifetime and the preparation for the study of T-violation using neutrons is in progress. Present status of the beamline and present activities are reported.

DOI： 10.22323/1.208.0010

Magnetic shield design of in-situ SEOP polarized 3He neutron spin filter system Open Access

Kira H., Sakaguchi Y., Suzuki J., Oku T., Nakamura M., Arai M., Kakurai K., Endo Y., Arimoto Y., Ino T., Shimizu H.M., Kamiyama T., Ohoyama K., Hiraka H., Tsutsumi K., Yamada K., Chang L.J.

Physics Procedia 42 巻頁： 200 - 205 2013年

出版者・発行元：Physics Procedia

A polarized <sup>3</sup>He neutron spin filter requires a suitably homogeneous magnetic environment to avoid depolarization of <sup>3</sup>He nuclear spin. In the present study, we discussed the required performance of the magnetic shield for an in-situ spin exchange optical pumping neutron spin filter system and designed a magnetic shield with T<inf>1mag</inf> > 100 h under a magnetic field of 3.5 mT perpendicular to the guide field. We then constructed the magnetic shield and confirmed its performance. Finally, we succeeded in developing a magnetic shield for a polarized <sup>3</sup>He neutron spin filter system for J-PARC. © 2013 The Authors.

DOI： 10.1016/j.phpro.2013.03.195

Rebunching low energy neutrons by magnetic acceleration and deceleration Open Access

Iwashita Y., Imajo S., Kitaguchi M., Arimoto Y., Shimizu H.M., Yoshioka T., Seki Y., Geltenbort P.

Ipac 2012 International Particle Accelerator Conference 2012 頁： 2766 - 2768 2012年12月

出版者・発行元：Ipac 2012 International Particle Accelerator Conference 2012

Acceleration control for neutrons was demonstrated. Ultra cold neutrons (UCN) -neutrons with energies less than 300 neV - can be accelerated or decelerated by means ofstatic magnetic and RF fields. Neutrons have a magnetic dipole moment, and hence theirkinetic energies vary depending on their spin in magnetic fields. Their kinetic energiesare restored when they leave the magnetic field area if their spin did not flip. A spinflip can be triggered by applying an RF field whose frequency coincides with the spinprecession frequency of a neutron in this magnetic field. This allows to tune the kineticenergy of neutrons. This method can be used to rebunch a pulsed beam of neutrons to astorage bottle that can store UCN. By opening and closing the storage bottle synchronouslywith the rebuncher, high UCN densities can be achieved for precision measurements ofneutron properties such as the Electric Dipole Moment. Copyright © 2012 by IEEE.

Demonstration of focusing by a neutron accelerator

Arimoto, Y; Gertenbort, P; Imajo, S; Iwashita, Y; Kitaguchi, M; Seki, Y; Shimizu, HM; Yoshioka, T

PHYSICAL REVIEW A 86 巻 ( 2 ) 2012年8月

出版者・発行元：Physical Review A Atomic Molecular and Optical Physics

Space-time focusing was demonstrated by a neutron accelerator. Test experiments were performed by using very slow neutrons at High-Flux Reactor at Institut Laue-Langevin. Focusing of neutrons at the detector position through the accelerator was observed. Focusing neutrons enables us to transport the neutrons while maintaining density from source to experimental position. This will be a powerful technique for measurement of the permanent electric dipole moment of neutrons, which require a high density of neutrons. © 2012 American Physical Society.

DOI： 10.1103/PhysRevA.86.023843

Variable permanent magnet multipoles

Iwashita Y., Yamada M., Ushijima S., Fuwa Y., Nasu Y., Tongu H., Masuzawa M., Shimizu H.

IEEE Transactions on Applied Superconductivity 22 巻 ( 3 ) 2012年6月

出版者・発行元：IEEE Transactions on Applied Superconductivity

Permanent magnet quadrupoles (PMQ) and sextupoles (PMSx) have been fabricated and tested. Their effective strengths are variable. The PMQ has been developed as a final focus magnet for a linear collider. There is enough space to put Gluckstern's 5-ring singlet structures in each incoming beam line. The magnetic center offsets and higher harmonic components can be adjusted by adjusting the positions of the magnet pieces with screws on holders. The measured integrated gradient can be reduced down to less than 1% of the maximum strength. The PMSx has been developed to focus pulsed cold neutrons for a small angle neutron scattering (SANS) experiment. The strength is modulated by a so called double ring structure, where the inner ring is fixed and the outer ring is rotated. A torque canceller can reduce the torque to rotate the outer ring by one third of its original magnitude. The focal length of the fabricated triplet lens is less than 50 cm for Very Cold Neutrons (VCN). It is demonstrated that VCN-SANS can shorten a SANS beamline, which usually has a few tens of meters, down to 2 ∼ 3 meters. © 2002-2011 IEEE.

DOI： 10.1109/TASC.2012.2185471

Demonstration of optical thickness measurement using multilayer cold neutron interferometer Open Access

Seki Y., Uda J., Funahashi H., Kitaguchi M., Hino M., Otake Y., Taketani K., Shimizu H. M.

5TH EUROPEAN CONFERENCE ON NEUTRON SCATTERING 340 巻 2012年

出版者・発行元：Journal of Physics: Conference Series

We have measured the optical thickness of a phase object for the first time using multilayer cold neutron interferometer. The measured phase shift of 15.1 ± 1.9 wavelength agreed with the expected value of 17.4 ± 0.7 wavelength due to an about 600-μm-thick silicon plate. This demonstration reconfirmed that two paths in our new interferometer were completely separate, and showed its applicability into various precise measurements.

DOI： 10.1088/1742-6596/340/1/012039

11aSG-5 ダイヤモンドライクカーボン薄膜による中性子ミラーの開発(11aSG 中性子・ポジトロニウム,素粒子実験領域) Open Access

櫻井大, 清水裕彦, 猪野隆, 吉岡瑞樹, 北口雅暁, 三島賢二, 覚正信徳

日本物理学会講演概要集 67.2.1 巻 ( 0 ) 頁： 13 2012年

25pCL-5 SEOP式偏極^3He中性子スピンフィルターにおける到達^3He偏極率制限因子についての考察(25pCL X線・粒子線(中性子),領域10(誘電体,格子欠陥,X線・粒子線,フォノン)) Open Access

坂口佳史, 吉良弘, 奥降之, 篠原武尚, 鈴木淳市, 酒井健二, 中村充孝, 鈴谷賢太郎, 相澤一也, 新井正敏, 武田全康, 遠藤康夫, 有本靖, 猪野隆, 清水裕彦, 神山崇, 大山研司, 平賀晴弘, 山田和芳, 張烈錚, 尾原幸治, 加倉井和久

日本物理学会講演概要集 67.1.4 巻 ( 0 ) 頁： 1006 2012年

25pCL-14 J-PARC偏極度解析中性子分光器計画の進展(25pCL X線・粒子線(中性子),領域10(誘電体,格子欠陥,X線・粒子線,フォノン)) Open Access

大山研司, 岩佐和晃, 横尾哲也, 伊藤晋一, 富安啓輔, 松浦直人, 平賀晴弘, 藤田全基, 木村宏之, 佐藤豊人, 佐藤卓, 有馬孝尚, 猪野隆, 吉良弘, 坂口佳史, 奥隆之, 有本靖, 鈴木淳市, 清水裕彦, 武田全康, 金子耕士, 日野正裕, 武藤豪, 野尻浩之

日本物理学会講演概要集 67.1.4 巻 ( 0 ) 頁： 1008 2012年

24aFA-7 中性子電気双極子モーメント測定実験のための高密度超冷中性子輸送法の開発(24aFA ミュオニウム・中性子・ポジトロニウム,素粒子実験領域) Open Access

北口雅暁, 吉岡瑞樹, 清水裕彦, 有本靖, 竹谷薫, 猪野隆, 武藤豪, 岩下芳久, 今城想平, 三島賢二, 神谷好郎, 山下了, 関義親, 旭耕一郎, 吉見彰洋, 嶋達志

日本物理学会講演概要集 67.1.1 巻 ( 0 ) 頁： 24 2012年

14aSG-3 低エネルギー中性子小角散乱を用いた重力法則の検証(14aSG 新粒子・新物理の探索,素粒子実験領域) Open Access

松本悟, 吉岡瑞樹, 清水裕彦, 嶋達志, 猪野隆

日本物理学会講演概要集 67.2.1 巻 ( 0 ) 頁： 25 2012年

11aSG-7 J-PARC MLFにおける超冷中性子(UCN)Rebuncherの開発(11aSG 中性子・ポジトロニウム,素粒子実験領域) Open Access

今城想平, 岩下芳久, 清水裕彦, 吉岡瑞樹, 北口雅暁, 有本靖, 関義親

日本物理学会講演概要集 67.2.1 巻 ( 0 ) 頁： 13 2012年

11aSG-6 超冷中性子用ミラー基板の表面ラフネスの評価(11aSG 中性子・ポジトロニウム,素粒子実験領域) Open Access

関義親, 北口雅暁, 古岡瑞樹, 清水裕彦, 山田悟史

日本物理学会講演概要集 67.2.1 巻 ( 0 ) 頁： 13 2012年

27aXC-10 電磁カロリメータFORESTを用いた∧光生成反応の研究(27aXC 実験核物理領域,理論核物理領域合同エキゾチック系・ハドロン構造(合同),実験核物理領域) Open Access

土川雄介, 藤村寿子, 橋本亮, 石川貴嗣, 桝本新一, 宮部学, 中村聡彦, 清水肇, 鈴木耕拓, 山崎寛仁

日本物理学会講演概要集 67.1.1 巻 ( 0 ) 頁： 112 2012年

Development of polarized Xe gas target for neutron experiment at J-PARC Open Access

Sakai K., Oku T., Shinohara T., Kira H., Ooi M., Maekawa F., Kakurai K., Ino T., Arimoto Y., Shimizu H. M., Sakaguchi Y., Suzuki J., Ohoyama K., Chang L. J.

5TH EUROPEAN CONFERENCE ON NEUTRON SCATTERING 340 巻 2012年

出版者・発行元：Journal of Physics: Conference Series

At the Materials and Life science experimental Facility (MLF) in J-PARC, an experiment of detecting a neutron polarizing ability caused by a neutron-nuclear spin correlation at a resonant peak of 129Xe is planned. We evaluated measurable quantities based on a neutron optical theorem, developed a polarized Xe gas system, and carried out a feasibility test of our apparatus.

DOI： 10.1088/1742-6596/340/1/012037

Measurement of the neutron beam polarization of BL05/NOP beamline at J-PARC

Ino, T; Arimoto, Y; Yoshioka, T; Mishima, K; Taketani, K; Muto, S; Shimizu, HM; Kira, H; Sakaguchi, Y; Oku, T; Sakai, K; Shinohara, T; Suzuki, J; Otono, H; Oide, H; Yamashita, S; Imajo, S; Funahashi, H; Yamada, M; Iwashita, Y; Kitaguchi, M; Hino, M; Suzuki, Z; Sanuki, T; Seki, T; Hirota, K; Ikeda, K; Sato, H; Otake, Y; Ohmori, H; Morishima, T; Shima, T

PHYSICA B-CONDENSED MATTER 406 巻 ( 12 ) 頁： 2424 - 2428 2011年6月

出版者・発行元：Physica B Condensed Matter

We measured the neutron beam polarization of the BL05/NOP (Neutron Optics and Physics) beamline at J-PARC with an accuracy of less than 10<sup>-3</sup> using polarized <sup>3</sup>He gas as a neutron spin analyzer. Precise polarimetry of the neutron beam is necessary to understand the beamline optics as well as for the asymmetry measurements of the neutron beta decay, which are planned in this beamline. © 2010 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2011.01.009

Development and test of SEOP neutron spin filter in Japan

Kira H., Sakaguchi Y., Oku T., Suzuki J., Nakamura M., Arai M., Kakurai K., Endo Y., Arimoto Y., Ino T., Shimizu H.M., Kamiyama T., Tsutsumi K., Ohoyama K., Hiraka H., Yamada K., Chang L.J.

Physica B Condensed Matter 406 巻 ( 12 ) 頁： 2433 - 2435 2011年6月

出版者・発行元：Physica B Condensed Matter

We have begun the development of an in-situ spin-exchange optical pumping (SEOP) system aiming to use it as a neutron spin filter for incident beam polarization at the Japan Proton Accelerator Research Complex (J-PARC). To use it, it is recommended that the optics be adjusted easily, have high stability, and have a small size. In this paper we improved our previous SEOP system aiming to use it in J-PARC and performed a neutron beam test at the JRR-3 NOP beamline to see the performance of the neutron spin filter (NSF). The polarization of the <sup>3</sup>He gas reached 73%. This paper gives the present status of the development of in-situ SEOP system in J-PARC. © 2010 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2010.12.019

External cavity design of high-power diode laser for polarized helium-3 neutron spin filters based on spin-exchange optical pumping

Arimoto Y., Ino T., Shimizu H.M., Kamiyama T., Kira H., Oku T., Sakaguchi Y., Kakurai K., Sakai K., Suzuki J., Koizumi S., Arai M., Endo Y., Nakamura M., Shinohara T., Takeda M., Wakimoto S., Yamazaki D., Ohoymama K., Hiraka H., Yamada K., Tsutsumi K., Chang L.J.

Physica B Condensed Matter 406 巻 ( 12 ) 頁： 2439 - 2442 2011年6月

出版者・発行元：Physica B Condensed Matter

Polarized neutron spin filters are being developed based on spin-exchange optical pumping. In the present study a high-power diode laser (85 W) was used to excite Rb atoms and the laser linewidth was narrowed using an external cavity. The optics in the external cavity were designed by ray tracing. The ray-trace calculations demonstrated that a doublet lens in front of the laser eliminates aberrations. The maximum spectral peak height in the doublet optics was found to be 25% higher than for a singlet lens. © 2010 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2010.11.089

A transport optics for pulsed ultracold neutron sources

Shimizu H.M., Iwashita Y., Kitaguchi M., Mishima K., Yoshioka T.

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 634 巻 ( 1 SUPPL. ) 頁： S25 - S27 2011年4月

出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

High-density ultracold neutron (UCN) is commonly desired for the improvement of the experimental sensitivity to measure the electric dipole moment of neutrons. We discuss a method to suppress the decrease of the UCN density in transporting UCNs to the spatially separated storage volume by changing the UCN velocity synchronizing to the UCN time-of-flight. © 2010 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2010.06.210

The performance of magnetic lens for focusing VCN-SANS

Yamada, M; Iwashita, Y; Kanaya, T; Ichikawa, M; Tongu, H; Kennedy, SJ; Shimizu, HM; Mishima, K; Yamada, NL; Hirota, K; Carpenter, JM; Lal, J; Andersen, K; Geltenbort, P; Guerard, B; Manzin, G; Hino, M; Kitaguchi, M; Bleuel, M

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 634 巻 ( 1 SUPPL. ) 頁： S156 - S160 2011年4月

出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

We have developed a prototype rotating-permanent magnet sextupole lens (named rot-PMSx) for more efficient experiments with neutron beams in time of flight (ToF) mode. This lens can modulate the focusing strength over range 1.5×10<sup>4</sup>T/<sup>m2</sup>g′5.9×10<sup>4</sup>T/ <sup>m2</sup>. Synchronization between the modulation and the beam pulse produces a focused beam without significant chromatic aberration. We anticipate that this lens could be utilized in focusing small angle neutron scattering (SANS) instruments for novel approach to high resolution SANS. We carried out experiments testing the principle of this lens at the very cold neutron (VCN) beamline (PF2) at Institut Laue-Langevin (ILL), France. The focused beam image size at the detector was kept constant at the same beam size as the source (≈3mm) over a wavelength range of 30λ48 in focal length of ≈1.14m. The flux gain was about 12 relative to a beam without focusing, and the depth of focus was quite large. These results show the good performance of this lens and the system. Thereupon we have demonstrated the performance of this test bed for high resolution focusing of VCN-SANS for a well-studied softmatter sample; a deuterium oxide solution of Pluronic F127, an (PEO)<inf>100</inf>(PPO) <inf>65</inf>(PEO)<inf>100</inf> tri-block copolymer in deuterium oxide. The results of the focusing experiment and the focusing VCN-SANS are presented. © 2010 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2010.06.259

Satellite pulsed tiny neutron source at Kyoto University, Sakyo

Iwashita Y., Nagae T., Tanimori T., Fujioka H., Shimizu H.

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 634 巻 ( 1 SUPPL. ) 頁： S97 - S99 2011年4月

出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

A pulsed neutron source facility will be constructed at Kyoto University, where the accelerated 3.5 MeV proton beam will bombard a Li or Be target to generate neutrons. The average current, the pulse width and the typical repetition rate are 100 μA, 100 μs and 70 Hz, respectively. The purposes of the system are neutron imaging, material science, fundamental physics, etc. This kind of compact facility, which can be distributed at modest cost, will help to incubate new ideas and promote growth of neutron science worldwide. © 2010 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2010.06.356

A high <i>S</i>/<i>N</i> ratio spin flip chopper system for a pulsed neutron source

Taketani, K; Ebisawa, T; Hino, M; Hirota, K; Ino, T; Kitaguchi, M; Mishima, K; Muto, S; Oide, H; Oku, T; Otone, H; Sakai, K; Shima, T; Shimizu, HM; Yamashita, S; Yoshioka, T

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 634 巻頁： S134 - S137 2011年4月

16aSD-5 中性子電気双極子モーメント測定実験のための高密度超冷中性子輸送法の開発II(16aSD ニュートリノ・Bの物理・中性子EDM,素粒子実験領域) Open Access

北口雅暁, 吉岡瑞樹, 三島賢二, 有本靖, 竹谷薫, 猪野隆, 武藤豪, 清水裕彦, 岩下芳久, 今城想平, 神谷好朗, 山下了, 旭耕-郎, 吉見彰洋, 嶋達志

日本物理学会講演概要集 66.2.1 巻 ( 0 ) 頁： 14 2011年

25aTN-6 J-PARC偏極度解析中性子分光器計画の現状(25aTN X線・粒子線(中性子),領域10(誘電体,格子欠陥,X線・粒子線,フォノン)) Open Access

大山研司, 岩佐和晃, 伊藤晋一, 横尾哲也, 平賀晴弘, 藤田全基, 松浦直人, 佐藤豊人, 堀金和正, 佐藤卓, 富安啓輔, 有馬孝尚, 猪野隆, 吉良弘, 坂口佳史, 奥隆之, 有本靖, 鈴木淳市, 清水裕彦, 武田全康, 金子耕士, 日野正裕, 武藤豪, 野尻浩之

日本物理学会講演概要集 66.1.4 巻 ( 0 ) 頁： 952 2011年

22pJA-2 J-PARC偏極度解析中性子分光器計画の進展(22pJA X線・粒子線(中性子),領域10(誘電体,格子欠陥,X線・粒子線,フォノン)) Open Access

大山研司, 岩佐和晃, 横尾哲也, 伊藤晋一, 平賀晴弘, 藤田全基, 松浦直人, 木村宏之, 富安啓輔, 佐藤豊人, 佐藤卓, 有馬孝尚, 猪野隆, 吉良弘, 坂口佳史, 奥隆之, 有本靖, 鈴木淳市, 清水裕彦, 武田全康, 金子耕士, 日野正裕, 武藤豪, 野尻浩之

日本物理学会講演概要集 66.2.4 巻 ( 0 ) 頁： 995 2011年

22aJA-6 偏極^3He中性子スピンフィルターのガラスセルの開発IV(22aJA X線・粒子線(中性子),領域10(誘電体,格子欠陥,X線・粒子線,フォノン)) Open Access

坂口佳史, 吉良弘, 奥隆之, 篠原武尚, 鈴木淳市, 酒井健二, 中村充孝, 鈴谷賢太郎, 相澤一也, 新井正敏, 武田全康, 遠藤康夫, 有本靖, 猪野隆, 清水裕彦, 神山崇, 大山研司, 平賀晴弘, 山田和芳, 張烈錚, 尾原幸治, 加倉井和久

日本物理学会講演概要集 66.2.4 巻 ( 0 ) 頁： 983 2011年

16aSD-7 J-PARC MLFでのドップラーシフターを用いた超冷中性子の生成III(16aSD ニュートリノ・Bの物理・中性子EDM,素粒子実験領域) Open Access

今城想平, 藤岡宏之, 清水裕彦, 三島賢ニ, 吉岡瑞樹, 北口雅暁, 日野正裕

日本物理学会講演概要集 66.2.1 巻 ( 0 ) 頁： 15 2011年

28aGB-7 J-PARC MLFでのドップラーシフターを用いた超冷中性子の生成II(28aGB ニュートリノ・中性子・その他,素粒子実験領域) Open Access

今城想平, 藤岡宏之, 清水裕彦, 三島賢二, 吉岡瑞樹, 北口雅暁, 日野正裕

日本物理学会講演概要集 66.1.1 巻 ( 0 ) 頁： 31 2011年

28aGB-8 中性子電気双極子モーメント測定実験のための高密度超冷中性子輸送法の開発(28aGB ニュートリノ・中性子・その他,素粒子実験領域) Open Access

北口雅暁, 吉岡瑞樹, 三島賢二, 有本靖, 竹谷薫, 猪野隆, 武藤豪, 清水裕彦, 岩下芳久, 今城想平, 神谷好朗, 山下了, 旭耕一郎, 吉見彰洋, 嶋達志

日本物理学会講演概要集 66.1.1 巻 ( 0 ) 頁： 31 2011年

Filaggrin gene defects and the risk of developing allergic disorders

Osawa R., Akiyama M., Shimizu H.

Allergology International 60 巻 ( 1 ) 頁： 1 - 9 2011年

出版者・発行元：Allergology International

Filaggrin is a key protein that facilitates terminal differentiation of the epidermis and formation of the skin barrier. Mutations in the gene encoding filaggrin (FLG) have been identified as the cause of ichthyosis vulgaris (IV) and have been shown to be major predisposing factors for atopic dermatitis (AD). Approximately 40 loss-offunction FLG mutations have been identified in patients with ichthyosis vulgaris (IV) and/or atopic dermatitis (AD) in Europe and Asia. Major differences exist in the spectra of FLG mutations observed between different ancestral groups. Notably, prevalent FLG mutations are distinct between European and Asian populations. Many cohort studies on FLG mutations in AD have revealed that approximately 25-50% of AD patients harbour filaggrin mutations as a predisposing factor. In addition, FLG mutations are significantly associated with ADassociated asthma. The risk for developing allergic rhinitis is also significantly higher with a FLG mutation, both with and without accompanying AD. Recent studies have hypothesized that skin barrier defects caused by FLG mutations allows allergens to penetrate the epidermis and to interact with antigen-presenting cells, leading to the development of atopic disorders including asthma. The restoration of skin barrier function seems a feasible and promising strategy for prophylactic treatment of AD patients with FLG mutations. © 2011 Japanese Society of Allergology.

DOI： 10.2332/allergolint.10-RAI-0270

Longitudinal-gradient magnet for time focusing of ultra-cold neutrons Open Access

Arimoto Y., Yoshioka T., Shimizu H. M., Mishima K., Ino T., Taketani K., Muto S., Kitaguchi M., Imajo S., Iwashita Y., Yamashita S., Kamiya Y., Yoshimi A., Asahi K., Shima T., Sakai K.

2ND INTERNATIONAL WORKSHOP ON THE PHYSICS OF FUNDAMENTAL SYMMETRIES AND INTERACTIONS (PSI) 17 巻頁： 20 - 29 2011年

出版者・発行元：Physics Procedia

A gradient DC magnet is designed using 3D magnetic field analysis code. This magnet, referred to as a B0 magnet, is one of the key elements of a time-focusing device for ultra-cold neutrons (UCNs) based on a radio frequency gradient flipper - a so-called rebuncher. The magnet generates a guide and a potential field that interacts with the magnetic moment of UCNs and its main body comprises a C-shaped yoke made from iron. A field gradient is generated by a pole arrangement that includes an anisotropic inter-pole, which causes the fringe field to be uniform in the longitudinal direction even when the pole gap distance changes. The designed magnet has the following properties: (1) a maximum B-field of 10 kGauss, decreasing to 2 kGauss at a longitudinal distance of 25 cm, with a gradient of less than 400 Gauss/cm, (2) variations in the fringe field along the y direction is less than 4% over a range of -3 cm≤ y ≤ 3 cm at any z position in the spin-flipping region. Tracking simulations show that the B0 magnet is capable of accepting UCNs in the velocity range 2.3∼3.3 m/s. © 2011 Published by Elsevier B.V.

DOI： 10.1016/j.phpro.2011.06.013

Applications of 3He neutron spin filters on the small-angle neutron scattering spectrometer SANS-J-II Open Access

Sakaguchi Y., Kira H., Oku T., Shinohara T., Suzuki J., Sakai K., Nakamura M., Aizawa K., Arai M., Noda Y., Koizumi S., Takeda M., Endoh Y., Chang L.J., Arimoto Y., Ino T., Shimizu H.M., Kamiyama T., Ohoyama K., Hiraka H., Tsutsumi K., Yamada K., Kakurai K.

Journal of Physics Conference Series 294 巻 ( 1 ) 2011年

出版者・発行元：Journal of Physics Conference Series

A polarized <sup>3</sup>He neutron spin filter has been applied to polarization analysis on the small-angle neutron scattering spectrometer SANS-J-II at JRR-3. Measurements were taken on silver behenate, which has several coherent peaks in the small-angle region with a background of spin incoherent hydrogen scattering. Here we demonstrate that the coherent and spin incoherent scattering were successfully separated by the polarization analysis using the <sup>3</sup>He spin filter on the instrument. © Published under licence by IOP Publishing Ltd.

DOI： 10.1088/1742-6596/294/1/012017

The novel method of focusing-sans with rotating magnetic sextupole lens and very cold neutrons

Yamada M., Iwashita Y., Ichikawa M., Tongu H., Kanaya T., Kennedy S.J., Yamada N.L., Shimizu H.M., Mishima K., Hino M., Kitaguchi M., Hirota K., Geltenbort P., Guerard B., Manzin G., Andersen K., Lal J., Carpenter J.M., Bleuel M.

Ipac 2010 1st International Particle Accelerator Conference 頁： 427 - 429 2010年12月

出版者・発行元：Ipac 2010 1st International Particle Accelerator Conference

We are developing a high-resolution small angle neutron scattering (SANS) instrument utilizing pulsed white very cold neutrons (VCN) and modulating magnetic lens for focusing in time of flight (ToF) mode. The magnetic lens adopted new modulation method for focusing pulsed neutron beams over some wavelength range without chromatic aberration; the lens is composed of two concentric permanent magnet arrays in sextupole geometry and the rotation of outer array about fixed inner array provides sinusoidal field gradient modulation. We named this lens as rotating-Permanent Magnet Sextupole lens (rot-PMSx). We have fabricated the prototype of rot-PMSx with the bore diameter ø15 mm and the magnetic length 66 mm. The modulation range of magnetic field strength g inside the bore 1.5×10<sup>4</sup> T/m ≤ g ≤ 5.9×10 T/m<sup>2</sup> and the repetition rate ≤ 25 Hz [1, 2]. We proved the focusing principle with it at PF2-VCN beam line in Institut Laue Langevin (ILL), France [3]. The focused beam image size was kept constant at the same beam size as the source (≈ 3 mm) over wavelength range of 30 Å ≤ λ ≤ 48 Å in focal length of ≈ 1.14 mm while the depth of focus was quite large. These results showed good performance of the rot-PMSx and we moved on to the demonstration of its performance as high-resolution VCN-f-SANS in this compact geometry of just 5 meters. We chose a tri-block copolymer poly(oxyeheylen-oxypropylene-oxyeheylen)(PEO<inf>100</inf>-PPO <inf>65</inf>-PEO<inf>100</inf>) called Pluronic F127 as a sample, which has been well studied since 1990' [4]. The measureable q range of this system were 0.009 Å<sup>-1</sup> ≤ q ≤ 0.3 Å<sup>-1</sup> or 0.004 Å<sup>-1</sup> q ≤ 0.08 Å<sup>-</sup>depending on the distances between the sample to detector 100 mm or 465 mm. The results of fitting these data to reasonable models were well consistent with one of same experiments carried out in the past. These results in two experiments are presented together.

Practical Applications of Permanent Magnet Multipoles

Iwashita, Y; Ichikawa, M; Yamada, M; Sugimoto, T; Tongu, H; Fujisawa, H; Masuzawa, M; Tauchi, T; Oku, T; Hirota, K; Shimizu, HM; Shi, C; Zhu, Y

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 20 巻 ( 3 ) 頁： 842 - 845 2010年6月

出版者・発行元：IEEE Transactions on Applied Superconductivity

Permanent magnets are superior to electromagnets in generating strong multipole magnetic fields. Their fields are sometimes stronger than those that can be generated by superconducting magnets with the same bore radius, when the number of poles are higher. Three fabricated multipoles including a quadrupole magnet for the ILC (International Linear Collider) final focus doublet, a quadrupole magnets as a spin filter for cold neutrons, and a sextupole magnet for neutron beam focusing are described. © 2006 IEEE.

DOI： 10.1109/TASC.2010.2040604

J-PARCにおける中性子基礎物理

清水裕彦

波紋 20 巻 ( 1 ) 頁： 25 - 29 2010年

記述言語：日本語出版者・発行元：日本中性子科学会

<p>A new beamline for a fundamental physics experiment has been built at the BL05 port in the Materials and Life Science Facility (MLF) in Japan Proton Accelerator Research Complex (J-PARC), and the first neutron beam was delivered on December 9th, 2008. This beamline is designed using novel techniques of neutron optics, and it is termed "Neutron Optics and Physics (NOP)." The beam from the moderator is deflected by multi-channel supermirrors and split into three branches for individual experiments. Physics with cold neutrons at the NOP beamline is discussed.</p>

DOI： 10.5611/hamon.20.1_25

13aSK-8 J-PARC MLFでのドップラーシフターを用いた超冷中性子の生成(13aSK LFV検出器・中性子実験・光検出器,素粒子実験領域) Open Access

今城想平, 藤岡宏之, 清水裕彦, 三島賢二, 吉岡瑞樹, 北口雅暁, 日野正裕

日本物理学会講演概要集 65.2.1 巻 ( 0 ) 頁： 18 2010年

23pHT-8 偏極^3He中性子スピンフィルターの^3Heガス偏極度の評価手段の開発(23pHT X線・粒子線(中性子),領域10(誘電体,格子欠陥,X線・粒子線,フォノン)) Open Access

吉良弘, 坂口佳史, 奥隆之, 鈴木淳市, 中村充孝, 新井正敏, 遠藤康夫, 加倉井和久, 有本靖, 猪野隆, 清水裕彦, 神山崇, 佐藤他加志, 佐藤孝一, 加美山隆, 鬼柳善明, 堤健之, 大山研司, 平賀晴弘, 山田和芳

日本物理学会講演概要集 65.1.4 巻 ( 0 ) 頁： 1016 2010年

23pHT-7 偏極^3He中性子スピンフィルターのガラスセルの開発(23pHT X線・粒子線(中性子),領域10(誘電体,格子欠陥,X線・粒子線,フォノン)) Open Access

坂口佳史, 吉良弘, 奥隆之, 鈴木淳市, 中村充孝, 新井正敏, 遠藤康夫, 加倉井和久, 武田全康, 脇本秀一, 山崎大, 小泉智, 有本靖, 猪野隆, 清水裕彦, 神山崇, 大山研司, 平賀晴弘, 堤健之, 山田和芳

日本物理学会講演概要集 65.1.4 巻 ( 0 ) 頁： 1016 2010年

23aEF-4 focusing VCN-SANSによる水溶性3ブロック共重合体(PEO-PPO-PEO)溶液の温度相転移現象の観測(23aEF 高分子・ゲル,領域12(ソフトマター物理,化学物理,生物物理)) Open Access

山田雅子, 岩下芳久, 金谷利治, 市川雅浩, 頓宮拓, 清水裕彦, 山田悟史, 三島賢二, 広田克也, 日野正裕, 北口雅暁

日本物理学会講演概要集 65.1.2 巻 ( 0 ) 頁： 396 2010年

22pBF-4 J-PARCにおける超冷中性子生成のためのドップラーシフターの開発(22pBF 加速器電源・J-PARC・中性子源・FFAG加速器(電源・負荷・配線の対称化),ビーム物理領域) Open Access

今城想平, 藤岡宏之, 清水裕彦, 三島賢二, 吉岡瑞樹, 北口雅暁, 日野正裕

日本物理学会講演概要集 65.1.1 巻 ( 0 ) 頁： 142 2010年

Development of modulating permanent magnet sextupole lens for focusing of pulsed cold neutrons

Yamada M., Iwashita Y., Ichikawa M., Tongu H., Fujisawa H., Shimizu H.M., Ino T., Mishima K., Taketani K., Morishima T., Mutou S., Yoshioka T., Oku T., Sakai K., Shinohara T., Suzuki J.I., Hirota K., Otake Y., Sato H., Seki Y., Kawasaki S., Otono H., Komamiya S., Yamashita S., Kamiya Y., Geltenbort P.

Proceedings of the 24th Linear Accelerator Conference Linac 2008 頁： 263 - 265 2009年12月

出版者・発行元：Proceedings of the 24th Linear Accelerator Conference Linac 2008

Cold neutron beams can be focused by a strong sextupole magnetic field. A permanent magnet sextupole lens whose focusing strength can be synchronously modulated at the rate of pulsed cold neutron beams is under development. This device should keep the focal point for pulsed neutron beams whose wavelength spreads as a function of time of flight. This kind of device improves the utilization of valuable neutrons and saves experiment time and costs. It will raise linac based small neutron sources as a good counter part to large powerful neutron facilities. Experimental results that were obtained at Institute Laue-Langevin (ILL) are also described.

DOI： 10.1016/j.physb.2009.06.132

A small angle neutron scattering (SANS) experiment using very cold neutrons (VCN)

Bleuel, M; Carpenter, JM; Micklich, BJ; Geltenbort, P; Mishima, K; Shimizu, HM; Iwashita, Y; Hirota, K; Hino, M; Kennedy, SJ; Lal, J

PHYSICA B-CONDENSED MATTER 404 巻 ( 17 ) 頁： 2629 - 2632 2009年9月

出版者・発行元：Physica B Condensed Matter

This paper describes the results of SANS measurements of small samples using the very cold neutron (VCN) beam of the PF2 instrument at the Institut Laue Langevin (ILL), France. In addition to a classical SANS pinhole collimation, the experiment used a polarizing supermirror as a monochromator and a magnetic sextupole lens to focus the neutron beam in order to gain intensity and avoid any material in the neutron beam besides the sample.

DOI： 10.1016/j.physb.2009.06.048

Simulation study of a pulsed neutron focusing using a pulsed electromagnetic lens coupled with a permanent magnet

Iwashita H., Iwasa H., Hiraga F., Kamiyama T., Kiyanagi Y., Suzuki J., Shinohara T., Oku T., Shimizu H.M.

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 600 巻 ( 1 ) 頁： 129 - 131 2009年2月

出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

A pulsed sextupole electromagnetic lens with suitably controlled time-dependent magnetic field can in principle focus pulsed neutrons at the same focal point over a wide range of wavelength as the lens removes aberrations. However, in fact, it is difficult to focus neutrons over a wide range of wavelength because attenuation of a practical pulsed sextupole electromagnet is faster than an ideal case. We have devised a method of canceling the difference between the practical pulsed sextupole magnetic field and the ideal magnetic field with the use of a permanent sextupole magnet. We performed simulation calculations to investigate the feasibility of this method, and it was shown that focusing wavelength range spread compared with the case using a pulsed magnetic lens only. This result indicates the usefulness of the method. © 2008.

DOI： 10.1016/j.nima.2008.11.105

13aSA-1 重力場による超冷中性子の量子状態観測 : ILL/PF2における実験結果I(中性子,カシミール力,ポジトロニウム,素粒子論領域) Open Access

市川豪, 川崎真介, 駒宮幸男, 神谷好郎, 佐貫智行, 清水裕彦, 日野正裕, 北口雅暁

日本物理学会講演概要集 64.2.1 巻 ( 0 ) 頁： 27 2009年

13aSA-2 重力場による超冷中性子の量子状態観測 : ILL/PF2における実験結果II(中性子,カシミール力,ポジトロニウム,素粒子論領域) Open Access

川崎真介, 市川豪, 駒宮幸男, 神谷好郎, 佐貫智行, 清水裕彦, 日野正裕, 北口雅暁

日本物理学会講演概要集 64.2.1 巻 ( 0 ) 頁： 27 2009年

27aSB-8 J-PARC BL05ビームライン用スピンフリップチョッパー(ビームライン,27aSB 素粒子実験領域,ビーム物理領域合同,素粒子実験領域) Open Access

北口雅暁, 日野正裕, 三島賢二, 竹谷薫, 吉岡瑞樹, 武藤豪, 猪野隆, 清水裕彦, 嶋達志, 酒井健二, 關義親, 舟橋春彦, 佐藤広海, 広田克也, 大竹淑恵, 音野瑛俊, 山下了, 鈴木善明, 佐貫智行

日本物理学会講演概要集 64.1.1 巻 ( 0 ) 頁： 25 2009年

30aRE-12 J-PARC BL05中性子光学・基礎物理実験装置の現状(30aRE X線・粒子線(中性子),領域10(誘電体,格子欠陥,X線・粒子線,フォノン物性)) Open Access

酒井健二, 武藤豪, 猪野隆, 吉岡瑞樹, 三島賢二, 竹谷薫, 清水裕彦

日本物理学会講演概要集 64.1.4 巻 ( 0 ) 頁： 975 2009年

27pYK-8 偏極^3He中性子スピンフィルターの開発その1(X線・粒子線(中性子),領域10,誘電体,格子欠陥,X線・粒子線,フォノン物性) Open Access

有本靖, 猪野隆, 清水裕彦, 神山崇, 吉良弘, 坂口佳史, 奥隆之, 鈴木淳市, 中村充孝, 新井正敏, 遠藤康夫, 加倉井和久, 大山研司, 平賀晴弘, 山田和芳

日本物理学会講演概要集 64.2.4 巻 ( 0 ) 頁： 882 2009年

27pYK-2 J-PARC中性子光学・基礎物理ビームラインの現状報告(X線・粒子線(中性子),領域10,誘電体,格子欠陥,X線・粒子線,フォノン物性) Open Access

猪野隆, 三島賢二, 竹谷薫, 吉岡瑞樹, 有本靖, 武藤豪, 清水裕彦, 音野瑛俊, 生出秀行, 久保田隆至, 山下了, 鈴木善明, 佐貫智行, 酒井健二, 鈴木淳市, 奥隆之, 篠原武尚, 北口雅暁, 日野正裕, 山田雅子, 岩下芳久, 嶋達志, 關義親, 舟橋春彦, 広田克也, 大竹淑恵

日本物理学会講演概要集 64.2.4 巻 ( 0 ) 頁： 881 2009年

27pYK-10 偏極^3He中性子スピンフィルターの開発その3(X線・粒子線(中性子),領域10,誘電体,格子欠陥,X線・粒子線,フォノン物性) Open Access

坂口佳史, 吉良弘, 奥隆之, 鈴木淳市, 中村充孝, 新井正敏, 遠藤康夫, 加倉井和久, 武田全康, 脇本秀一, 山崎大, 小泉智, 有本靖, 猪野隆, 清水裕彦, 神山崇, 大山研司, 平賀晴弘, 山田和芳

日本物理学会講演概要集 64.2.4 巻 ( 0 ) 頁： 882 2009年

27aSG-6 J-PARC BL05における中性子散乱断面積精密測定による未知相互作用探索計画(27aSG 中性子の物理,ニュートリノ検出器,素粒子実験領域) Open Access

嶋達志, 清水裕彦, 猪野隆, 三島賢二, 竹谷薫, 吉岡瑞樹, 武藤豪, 舟橋春彦, 北口雅暁, 日野正裕, 關義親, 広田克也, 大竹淑恵, 酒井健二, 鈴木淳市, 奥隆之, 篠原武尚, 音野瑛俊, 山下了, 鈴木善明, 佐貫智行

日本物理学会講演概要集 64.1.1 巻 ( 0 ) 頁： 25 2009年

27aSG-3 可変六極磁石による極冷中性子集束実験(27aSG 中性子の物理,ニュートリノ検出器,素粒子実験領域) Open Access

山田雅子, 岩下芳久, 市川雅浩, 杉本貴則, 頓宮拓, 藤澤博, 清水裕彦, 猪野隆, 三島賢二, 竹谷薫, 吉岡瑞樹, 武藤豪, 奥隆之, 鈴木淳市, 広田克也, 關義親, 川崎真介, 神谷好郎, 音野瑛俊

日本物理学会講演概要集 64.1.1 巻 ( 0 ) 頁： 25 2009年

27aSE-14 重力に束縛された超冷中性子の量子状態観測実験 : ILLでの実験に向けて(27aSE CP対称性の破れ,Bの物理,Kの物理,ポジトロニウム,素粒子実験領域) Open Access

市川豪, 川崎真介, 駒宮幸男, 神谷好郎, 佐貫智行, 清水裕彦, 日野正裕, 北口雅暁

日本物理学会講演概要集 64.1.1 巻 ( 0 ) 頁： 25 2009年

J-PARC UCN Taskforce

清水裕彦, 山下了

Summary of the J-PARC UCN Taskforce E-Print ArXiv0907.0515 2009年

Fundamental science for neutrons

Shimizu H.

International Journal of Phytoremediation 19 巻 ( 4 ) 頁： 43 - 44 2009年

Terahertz imaging with a two-dimensional array detector based on superconducting tunnel junctions

Ariyoshi S., Otani C., Dobroiu A., Sato H., Taino T., Matsuo H., Shimizu H.M.

33rd International Conference on Infrared and Millimeter Waves and the 16th International Conference on Terahertz Electronics 2008 Irmmw Thz 2008 2008年12月

出版者・発行元：33rd International Conference on Infrared and Millimeter Waves and the 16th International Conference on Terahertz Electronics 2008 Irmmw Thz 2008

We demonstrated terahertz imaging using a two-dimensional array detector with 5x5 elements based on superconducting tunnel junctions. Real-time 25-pixel imaging at 0.65 THz was successfully performed. The array detector also allowed the shortening of the total acquisition time for larger images, made up of pixel blocks. ©IEEE.

DOI： 10.1109/ICIMW.2008.4665736

2D elemental analysis approach in focused neutron beam induced prompt gamma-ray analysis at JAEA

Segawa M., Matsue H., Sekiya Y., Yamada S., Shinohara T., Oku T., Sasao H., Suzuki J., Shimizu H.M.

Journal of Radioanalytical and Nuclear Chemistry 278 巻 ( 3 ) 頁： 647 - 651 2008年12月

出版者・発行元：Journal of Radioanalytical and Nuclear Chemistry

We have constructed a new system which could analyze a position distribution of several elements in a sample with 2 dimensional prompt γ-ray analysis (2D PGA) system using focused neutron beam at JAEA. We aimed that the system could analyze local information in a sample with a good signal γ-ray from interested elements to noise of background γ-ray ratio. As a result, this system could determine the position resolution and spatial resolution within 1 mm. © 2008 Springer Science+Business Media, LLC.

DOI： 10.1007/s10967-008-1402-3

Strong variable permanent multipole magnets

Iwashita, Y; Ichikawa, M; Tajima, Y; Nakamura, S; Kumada, M; Spencer, CM; Tauchi, T; Kuroda, S; Okugi, T; Ino, T; Muto, S; Shimizu, HM

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 18 巻 ( 2 ) 頁： 957 - 960 2008年6月

出版者・発行元：IEEE Transactions on Applied Superconductivity

Three super strong permanent multipole magnets have been made: a fixed strength quadrupole, a variable quadrupole and a variable sextupole. The inner and outer diameters of the first 100 mm-length quadrupole are 14 mm and 100 mm, respectively. This fixed strength quad has an integrated gradient of 28.5 T; where the gradient at the center is more than 2.9 T/cm. The second, variable, quadrupole has an integrated strength of 38 T with 15 mm inner diameter and 230 mm length at the maximum: there are sixteen positions in its variable strength with about a 2 T even step width. The sextupole model is intended to change its strength at 25 Hz. One application of a variable quadrupole magnet is a final doublet quadrupole for an e+e- linear collider. Permanent magnet sextupoles are useful for focusing of cold neutrons, which are a very useful probe for material research. Strong octupoles for beam tail folding in the final focus beamline of a linear collider will also be possible with permanent magnets. These high order multipoles made from permanent magnets can achieve higher strengths, for a given bore radius, than superconducting ones. Design works are presented starting from brief review. © 2008 IEEE.

DOI： 10.1109/TASC.2008.921302

超伝導トンネル接合素子を用いたテラヘルツ波検出器アレイの開発とイメージング応用

有吉誠一郎, 大谷知行, ドブロユアドリアン, 佐藤広海, 田井野徹, 松尾宏, 清水裕彦

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 78 巻頁： 62 2008年5月

Application of a neutron-polarizing device based on a quadrupole magnet to a focusing SANS instrument with a magnetic neutron lens

Oku, T; Shinohara, T; Kikuchi, T; Oba, Y; Iwase, H; Koizumi, S; Suzuki, J; Shimizu, HM

MEASUREMENT SCIENCE AND TECHNOLOGY 19 巻 ( 3 ) 2008年3月

出版者・発行元：Measurement Science and Technology

A magnetic neutron lens based on a sextupole magnet is considered an ideal neutron-focusing device for focusing-geometry small-angle neutron scattering (FSANS) instruments using polarized neutrons. However, the magnetic neutron lens functions both as focusing and defocusing lens for positive and negative polarity neutrons, respectively. Negative polarity neutrons are defocused by the lens and spread over the detector of the instrument, resulting in an increase of the background level. Therefore, a neutron-polarizing device with a very high polarizing efficiency P ≳ 0.99 is required to be employed together with the magnetic neutron lens. A neutron-polarizing device based on a quadrupole magnet has a very high polarizing efficiency P ≳ 0.99, which is sufficient for the application to the FSANS instrument. In this study, we installed the quadrupole magnet in the FSANS instrument SANS-J-II and investigated its performance with respect to the conventional magnetic super-mirror polarizers of the FSANS instrument. © 2008 IOP Publishing Ltd.

DOI： 10.1088/0957-0233/19/3/034011

Variable permanent magnet sextupole lens for focusing of pulsed cold neutrons

Iwashita, Y; Tajima, Y; Ichikawa, M; Nakamura, S; Ino, T; Muto, S; Shimizu, HM

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 586 巻 ( 1 ) 頁： 73 - 76 2008年2月

出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

A Variable Permanent Magnet Sextupole (VPMS) lens that can focus pulsed slow neutrons is under development. It is based on the extended Halbach configuration to generate stronger magnetic field. In order to adjust the strength, the magnet is divided into two nested rings, where the inner ring is fixed and the outer ring can be rotated. This device will focus cold neutrons with wavelength of a few to several Angstroms at about 10 m focal length. We fabricated a half-scale model to measure the strength and the torque as functions of the rotor angle. Because the torque is measured as high as more than 30 N m, a mechanism to rotate the rotor is carefully designed. After installation of such a mechanism, a motor will drive the rotor and the temperature rise caused from eddy current loss will be measured. Detailed development of the system will be presented. © 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2007.11.058

The JEM-EUSO project: Observing extremely high energy cosmic rays and neutrinos from the international space station

Ebisuzaki, T; Uehara, Y; Ohmori, H; Kawai, K; Kawasaki, Y; Sato, M; Takizawa, Y; Bertaina, ME; Kajino, F; Sawabe, T; Inoue, K; Sasaki, A; Sakata, M; Yamamoto, Y; Nagano, M; Inoue, N; Shibata, T; Sakaki, N; Uchihori, Y; Takahashi, Y; Shimizu, H; Arai, Y; Kurihara, Y; Fujimoto, H; Yoshida, S; Mizumoto, Y; Inoue, S; Asano, K; Sugiyama, T; Watanabe, J; Ikeda, H; Suzuki, M; Imamura, T; Yano, H; Murakami, T; Yonetoku, D; Itow, Y; Taguchi, M; Nagata, M; Nagataki, S; Abe, S; Tajima, T; Adams, JH; Mitchell, S; Christl, MJ; Watts, J; English, A; Takahashi, Y; Pitalo, K; Hadaway, J; Geary, J; Readon, P; Crawford, H; Pennypacker, C; Arisaka, K; Cline, D; Gorodetsky, P; Salin, P; Patzark, T; Maurissen, A; Valentin, M

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS 175 巻 ( SUPPL.: COMPLETE ) 頁： 237 - 240 2008年1月

微細孔形成技術を利用した中性子検出用MSGCの開発

藤田薫, 高橋浩之, 猪野隆, 清水裕彦, 岸本俊二, 古坂道弘, 奥隆之, 鈴木淳市

日本原子力学会　年会・大会予稿集 2008f 巻 ( 0 ) 頁： 131 - 131 2008年

記述言語：日本語出版者・発行元：一般社団法人日本原子力学会

新たな配線技術を利用した中性子検出に向けたマイクロストリップガス比例計数管(MSGC)の開発を行った。1mmのアノードピッチと同等の間隔で基板を貫通する微細孔を形成し、その孔を通して信号を取り出せるMSGCの製作を行い動作を確認した。

DOI： 10.11561/aesj.2008f.0.131.0

Terahertz Imaging with a Two-dimensional Array Detector Based on Superconducting Tunnel Junctions

Ariyoshi, S; Otani, C; Dobroiu, A; Sato, H; Taino, T; Matsuo, H; Shimizu, HM

2008 33RD INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES, VOLS 1 AND 2 頁： 618 - 618 2008年

中性子光学・基礎物理ビームライン (J-PARC BL05)

清水裕彦

波紋 18 巻 ( 3 ) 頁： 151 - 154 2008年

出版者・発行元：日本中性子科学会

A pulsed cold neutron beam for the study of neutron optics and fundamental physics (NOP) is under construction as the BL05 of the spallation neutron source of the J-PARC. The NOP beamline has three beam branches, which provide the highly-polarized beam, high intensity beam and low divergence beam for the neutron decay experiment, the neutron scattering experiment and the neutron interferometry experiment, respectively. We overview the physics to be studied at the NOP beamline at its beginning stage.

DOI： 10.5611/hamon.18.151

23aSJ-10 重力場による超冷中性子の量子状態観測 : 冷中性子を用いた測定器の性能評価(23aSJ 半導体検出器,素粒子実験領域) Open Access

市川豪, 川崎真介, 駒宮幸男, 神谷好郎, 佐貫智行, 清水裕彦, 日野正裕, 北口雅暁

日本物理学会講演概要集 63.2.1 巻 ( 0 ) 頁： 22 2008年

24pWG-11 多重連結六極磁石による白色中性子の集光と応用(X線・粒子線(中性子),領域10,誘電体,格子欠陥,X線・粒子線,フォノン物性) Open Access

鈴木淳市, 奥隆之, 篠原武尚, 大場洋次郎, 菊地隆之, 清水裕彦

日本物理学会講演概要集 63.1.4 巻 ( 0 ) 頁： 931 2008年

24pWG-10 熱中性子による即発γ線を用いた2-3次元元素分布測定システムの開発(X線・粒子線(中性子),領域10,誘電体,格子欠陥,X線・粒子線,フォノン物性) Open Access

瀬川麻里子, 松江秀明, 山田悟, 篠原武尚, 奥隆之, 笹尾一, 鈴木淳市, 清水裕彦

日本物理学会講演概要集 63.1.4 巻 ( 0 ) 頁： 931 2008年

23pSM-6 パルス冷中性子集束用の強度変調型永久六極磁石の開発II(23pSM 中性子実験,素粒子実験領域) Open Access

山田雅子, 岩下芳久, 市川雅浩, 杉本貴則, 頓宮拓, 藤澤博, 清水裕彦, 猪野隆, 三島賢二, 竹谷薫, 吉岡瑞樹, 武藤豪, 森嶋隆裕, 奥隆之, 鈴木淳市, 篠原武尚, 酒井健二, 佐藤広海, 広田克也, 大竹淑惠, 關義親, 川崎真介, 駒宮幸男, 神谷好郎, 音野瑛俊, 山下了

日本物理学会講演概要集 63.2.1 巻 ( 0 ) 頁： 24 2008年

23pSM-5 極冷中性子干渉計の開発(23pSM 中性子実験,素粒子実験領域) Open Access

關義親, 北口雅暁, 日野正裕, 舟橋春彦, 三島賢二, 猪野隆, 竹谷薫, 吉岡瑞樹, 武藤豪, 森嶋隆裕, 清水裕彦, 佐貫智行, 鈴木善明, 嶋達志, 佐藤宏海, 広田克也, 大竹淑恵, 川崎真介, 駒宮幸男, 神谷好郎, 音野瑛俊, 山下了

日本物理学会講演概要集 63.2.1 巻 ( 0 ) 頁： 24 2008年

23pSM-2 J-PARCパルス中性子を用いた中性子干渉実験(23pSM 中性子実験,素粒子実験領域) Open Access

北口雅暁, 日野正裕, 關義親, 舟橋春彦, 三島賢二, 猪野隆, 竹谷薫, 吉岡瑞樹, 武藤豪, 森嶋隆裕, 清水裕彦, 嶋達志, 佐藤広海, 広田克也, 大竹淑恵, 酒井健二

日本物理学会講演概要集 63.2.1 巻 ( 0 ) 頁： 23 2008年

23aSJ-9 重力場による超冷中性子の量子状態観測 : ILLでの超冷中性子照射試験について(23aSJ 半導体検出器,素粒子実験領域) Open Access

川崎真介, 市川豪, 駒宮幸男, 神谷好郎, 佐貫智行, 清水裕彦, 日野正裕, 北口雅暁

日本物理学会講演概要集 63.2.1 巻 ( 0 ) 頁： 22 2008年

26pZL-2 冷中性子集束用の強度変調型永久六極磁石の開発(ビーム診断,ビーム制御,ビーム物理領域) Open Access

山田雅子, 市川雅浩, 岩下芳久, 田島裕二郎, 頓宮拓, 猪野隆, 清水裕彦, 武藤豪

日本物理学会講演概要集 63.1.1 巻 ( 0 ) 頁： 131 2008年

Ｊ‐ＰＡＲＣで迎える結晶学の新展開　　１．Ｊ‐ＰＡＲＣで展開される中性子科学　　中性子基盤研究開発

曽山和彦, 清水裕彦, 大友季哉

日本結晶学会誌 50 巻 ( 1 ) 頁： 66 - 71 2008年

Development of permanent mangnet sextupole lens for focusing of cold neutrons

Yamada M., Iwashita Y., Ichikawa M., Tongu H., Shimizu H., Ino T., Muto S.

Epac 2008 Contributions to the Proceedings 頁： 2392 - 2394 2008年

出版者・発行元：Epac 2008 Contributions to the Proceedings

A modulating permanent magnet sextupole lens that can focus pulsed cold neutrons is under development. The magnet is based on the extended Halbach configuration to generate stronger magnetic field. In order to adjust the strength, the magnet is divided into two co-axial nested rings, where the inner ring is fixed and the outer ring can be rotated. Synchronizing the period of the modulation with that of pulsed neutron beam suppress the chromatic aberration. We have fabricated a half scale model as a prototype and studied the strength, the temperature rise caused by eddy current. We have reduced the temperature rise about half of the former model by making the poles laminated structure. We are considering further improvement of the temperature rise and the system of rotating the outer ring with energy loss minimum. We are also measuring the very-cold neutrons focused by the half scale model.

Terahertz electromagnetic-wave detector using Nb-based superconducting tunnel junction on LiNbO<sub>3</sub> substrate absorber

Taino, T; Ishii, H; Yoshimura, S; Otani, C; Ariyoshi, S; Myoren, H; Kawase, K; Shibuya, T; Sato, H; Shimizu, HM; Takada, S

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 463 巻 ( SUPPL. ) 頁： 1119 - 1122 2007年10月

出版者・発行元：Physica C Superconductivity and Its Applications

We have been developing terahertz (THz) wave detectors using superconducting tunnel junctions (STJs). The STJs consist of the Nb/Al/AlO<inf>x</inf>/Al/Nb structure. We fabricated THz-wave detectors on LiNbO<inf>3</inf> substrates that have a high absorption coefficient for the frequency range of 10<sup>12</sup> Hz. Two kinds of signals were detected when the THz-wave was irradiated from the substrate side. One was an indirect signal related to the generation of phonons. The other was a signal that corresponds to directly generated quasi-particles in the Nb electrode of the STJ. The pulse height of the indirect signal was larger than that of the latter signal. To enlarge the detector area, we designed a STJ that has different areas of the base electrode and top electrode. In this paper, the characteristics of the THz-wave detector area will be discussed. © 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physc.2007.03.500

Development of neutron interferometer with wide-gapped "bSE"s for precision measurements

Seki Y., Kitaguchi M., Funahashi H., Taketani K., Hino M., Otake Y., Shimizu H.M.

Aip Conference Proceedings 915 巻頁： 202 - 205 2007年9月

出版者・発行元：Aip Conference Proceedings

We are developing large-dimensional cold-neutron interferometers with multilayer mirrors in order to investigate small interactions. In particular Jamin type interferometers composed of wide-gapped "BSE"s, which divide the beam completely, can realize the precision measurement of topological Aharonov-Casher effect. We have made a prototype with 200 μm gapped BSEs and confirmed the spatial separation of its two paths at monochromatic cold-neutron beamline MINE2 on JRR-3M reactor in JAEA. © 2007 American Institute of Physics.

DOI： 10.1063/1.2750763

Spin-selective neutron optics for neutron fundamental physics

Shimizu H.

Aip Conference Proceedings 915 巻頁： 197 - 201 2007年9月

マイクロパターンガス検出器の開発状況 : 東京大学におけるMSGC開発について

藤田薫, 高橋浩之, 二河久子, 高田夕佳, 猪野隆, 清水裕彦, 岸本俊二, 奥隆之, 鈴木淳市, 古坂道弘, 金沢正和

電気学会研究会資料. NE, 原子力研究会 2007 巻 ( 1 ) 頁： 1 - 4 2007年9月

CS-7-9 ファイバー通信波長帯(1.5μm)における超伝導トンネル接合を用いた単一光子検出器(CS-7.単一光子検出技術-量子通信を目指して,シンポジウム)

志岐成友, 佐藤広海, 清水裕彦

電子情報通信学会総合大会講演論文集 2007 巻 ( 2 ) 頁： "S - 31"-"S-32" 2007年3月

X-Ray Detection Using Superconducting Tunnel Junction Shaped Normal-Distribution-Function

TAINO Tohru, NISHIHARA Tomohiro, HOSHINO Koichi, MYOREN Hiroaki, SATO Hiromi, SHIMIZU Hirohiko M., TAKADA Susumu

IEICE transactions on electronics 90 巻 ( 3 ) 頁： 566 - 569 2007年3月

記述言語：英語出版者・発行元：一般社団法人電子情報通信学会

A normal-distribution-function-shaped superconducting tunnel junction (NDF-STJ) which consists of Nb/Al-AlO_x/Al/Nb has been fabricated as an X-ray detector. Current-voltage characteristics were measured at 0.4K using three kinds of STJs, which have the dispersion parameters σ of 0.25, 0.45 and 0.75. These STJs showed very low subgap leakage current of about 5nA. By irradiating with 5.9keV X-rays, we obtained the spectrum of these NDF-STJs. They showed good energy resolution with small magnetic fields of below 3mT, which is about one-tenth of those for conventional-shaped STJs.

Neutron diffraction under 30T pulsed magnetic fields

Ohoyama, K; Katoh, N; Nojiri, H; Matsuda, YH; Hiraka, H; Ikeda, K; Shimizu, HM

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 310 巻 ( 2 ) 頁： E974 - E976 2007年3月

出版者・発行元：Journal of Magnetism and Magnetic Materials

We develop techniques for neutron diffraction experiments under pulsed high magnetic fields. 30 T pulsed magnetic fields were successfully generated on a neutron spectrometer installed at a reactor. Neutron beam focusing devices and high efficiency neutron detecting system have also been developed. © 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jmmm.2006.10.958

パルス六極電磁石による中性子集光実験結果とシミュレーションとの比較

岩下秀徳, 岩佐浩克, 平賀富士夫, 加美山隆, 鬼柳善明, 鈴木淳市, 篠原武尚, 奥隆之, 清水裕彦

日本原子力学会　年会・大会予稿集 2007f 巻 ( 0 ) 頁： 182 - 182 2007年

記述言語：日本語出版者・発行元：一般社団法人日本原子力学会

本研究では、北大４５MeV Linacに設置された中性子パルス磁気レンズのテスト機の性能を評価することを目的として、粒子輸送モンテカルロコードであるPHITSを用いてシミュレーションを行った。実験結果とシミュレーション結果の比較を行ったところ、焦点でのビームサイズがほぼ一致し、集束条件を満たす波長範囲についてもほぼ一致した。さらに、実験では施設の関係で行うことのできない焦点距離をさらに長く設定した場合についてのシミュレーションを行い、その性能を明らかにした。

DOI： 10.11561/aesj.2007f.0.182.0

MSGCのカソード形状による電荷分割法の位置分解能評価

藤田薫, 高橋浩之, 二河久子, 高田夕佳, 猪野隆, 清水裕彦, 岸本俊二, 古坂道弘, 金沢正和

日本原子力学会　年会・大会予稿集 2007f 巻 ( 0 ) 頁： 106 - 106 2007年

記述言語：日本語出版者・発行元：一般社団法人日本原子力学会

マイクロストリップガス比例計数管のカソードの形状に工夫を施すことで放射線の位置特定を行うことができる。具体的にはカソードを２つの噛合った櫛状にパターニングし、それらの櫛の幅を変えておくことで、入射位置によって信号の大きさの比が変化する。現在、すでに長さ32mmの範囲で1.6mm程度の分解能が得られることを確認しているが、さらに高い位置分解能を得るために櫛の幅や周期などの最適化を行いその分解能を評価した。

DOI： 10.11561/aesj.2007f.0.106.0

Development of neutron interferometer with wide-gapped "BSE"s for precision measurements

Seki, Y; Kitaguchi, M; Funahashi, H; Taketani, K; Hino, M; Otake, Y; Shimizu, HM

PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM 915 巻頁： 202 - + 2007年

MS-tubeの中性子検出特性

藤田薫, 高橋浩之, 二河久子, 西広佑, 高田夕佳, 古坂道弘, 猪野隆, 清水裕彦, 岸本俊二, 奥隆之, 鈴木淳市, 豊川秀訓, 金沢正和

日本原子力学会　年会・大会予稿集 2007s 巻 ( 0 ) 頁： 72 - 72 2007年

記述言語：日本語出版者・発行元：一般社団法人日本原子力学会

有感長さ64cmのMSGC基板をパイプに封入して比例計数管として動作させることで、従来よりも高速、高位置分解能な比例計数管が実現可能である。本報告では、He-3をコンバータとして中性子検出器として動作させたときの位置検出特性などの動作特性について発表を行う。

DOI： 10.11561/aesj.2007s.0.72.0

19aXB-5 中性子ビーム偏極集光磁気レンズの開発1 : 永久磁石による四極磁気レンズと可変六極磁気レンズの設計(X線・粒子線(中性子),領域10,誘導体,格子欠陥,X線・粒子線,フォノン物性) Open Access

猪野隆, 岩下芳久, 奥隆之, 金子直勝, 川合將義, 小林庸男, 下ヶ橋秀典, 佐藤節夫, 篠原武尚, 清水裕彦, 鈴木淳市, 田原俊央, 広田克也, 武藤豪, 森嶋隆裕

日本物理学会講演概要集 62.1.4 巻 ( 0 ) 頁： 948 2007年

24aZG-2 超強力永久磁石を用いた強度可変多極磁石の磁場測定(24aZG ビーム制御,イオン加速器,レーザープラズマ相互作用,ビーム物理領域) Open Access

市川雅浩, 岩下芳久, 田島裕二郎, 頓宮拓, 猪野隆, 清水裕彦, 武藤豪

日本物理学会講演概要集 62.2.1 巻 ( 0 ) 頁： 133 2007年

21pRE-13 強磁場中における金属薄膜のα線に対する阻止能変化の測定(放射線物理(エネルギー付与過程),領域1,原子・分子,量子エレクトロニクス,放射線物理) Open Access

伊東宏之, 満田史織, 森田昭夫, 市川雅浩, 田島裕二郎, 清水裕彦, 吉村浩司, 戸崎充男, 岩下芳久

日本物理学会講演概要集 62.2.2 巻 ( 0 ) 頁： 156 2007年

21aTC-3 四極磁石型中性子偏極デバイスの開発と集光型中性子小角散乱実験への応用(X線・粒子線(中性子),領域10,誘電体,格子欠陥,X線・粒子線,フォノン物性) Open Access

奥隆之, 篠原武尚, 菊地隆之, 大場洋次郎, 岩瀬裕希, 小泉智, 鈴木淳市, 清水裕彦

日本物理学会講演概要集 62.2.4 巻 ( 0 ) 頁： 970 2007年

21aTC-2 中性子収束用薄膜フレネルレンズの開発(X線・粒子線(中性子),領域10,誘電体,格子欠陥,X線・粒子線,フォノン物性) Open Access

猪野隆, 安達智宏, 篠原武尚, 清水裕彦, 広田克也, 武藤豪

日本物理学会講演概要集 62.2.4 巻 ( 0 ) 頁： 970 2007年

21aTC-1 中性子ビーム偏極集光磁気レンズの開発3 : 永久磁石による四極磁気レンズのビーム実験(X線・粒子線(中性子),領域10,誘電体,格子欠陥,X線・粒子線,フォノン物性) Open Access

武藤豪, 猪野隆, 岩下芳久, 奥隆之, 金子直勝, 川合將義, 小林庸男, 下ヶ橋秀典, 佐藤節夫, 篠原武尚, 清水裕彦, 鈴木淳市, 田原俊央, 広田克也, 森嶋隆裕

日本物理学会講演概要集 62.2.4 巻 ( 0 ) 頁： 970 2007年

19aXB-9 中性子ビーム用デバイスのための曲面スーパーミラーの開発(X線・粒子線(中性子),領域10,誘導体,格子欠陥,X線・粒子線,フォノン物性) Open Access

池田一昭, 広田克也, 佐藤広海, 大森整, 清水裕彦, 古坂道弘

日本物理学会講演概要集 62.1.4 巻 ( 0 ) 頁： 949 2007年

19aXB-8 多重連結型複合六極磁石による白色パルス中性子集光の原理実鉦(X線・粒子線(中性子),領域10,誘導体,格子欠陥,X線・粒子線,フォノン物性) Open Access

鈴木淳市, 奥隆之, 篠原武尚, 清水裕彦

日本物理学会講演概要集 62.1.4 巻 ( 0 ) 頁： 949 2007年

19aXB-7 パルス六極電磁石による中性子ビーム集光(X線・粒子線(中性子),領域10,誘導体,格子欠陥,X線・粒子線,フォノン物性) Open Access

篠原武尚, 岩下秀徳, 鈴木淳市, 奥隆之, 加美山隆久, 岩佐浩克, 平賀富士夫, 鬼柳善明, 佐藤孝一, 清水裕彦

日本物理学会講演概要集 62.1.4 巻 ( 0 ) 頁： 949 2007年

19aXB-6 中性子ビーム偏極集光磁気レンズの開発2 : 永久磁石による四極磁気レンズと可変六極磁気レンズの試作(X線・粒子線(中性子),領域10,誘導体,格子欠陥,X線・粒子線,フォノン物性) Open Access

猪野隆, 岩下芳久, 奥隆之, 金子直勝, 川合將義, 小林庸男, 下ヶ橋秀典, 佐藤節夫, 篠原武尚, 清水裕彦, 鈴木淳市, 田原俊央, 広田克也, 武藤豪, 森崎隆裕

日本物理学会講演概要集 62.1.4 巻 ( 0 ) 頁： 949 2007年

Spin-selective neutron optics for neutron fundamental physics

Shimizu H. M.

PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM 915 巻頁： 197 - 201 2007年

Study on the relation between abnormal brain protein aggregation and neuopathy-abnormal aggregation of 3-repeat-tau by oxidation stress is related to pathogenesis of Alzheimer's disease

Naito S., Ikeda S., Shimizu H., Mochizuki H., Yasuda T., Mizuno Y., Furusaka M., Suzuki J., Fujiwara S., Wada K.

Polymer Preprints, Japan 55 巻 ( 2 ) 2006年12月

THz imaging with a linear array detector based on superconducting tunnel junctions

Ariyoshi S., Otani C., Dobroiu A., Matsuo H., Sato H., Taino T., Kawase K., Shimizu H.M.

Irmmw Thz 2006 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics 2006年12月

出版者・発行元：Irmmw Thz 2006 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics

We demonstrated terahertz imaging using a linear array detector with five elements based on superconducting tunnel junctions (STJs). Nondestructive imaging at 0.66 THz was successfully performed for a test metallic pattern and an integrated-circuit card using the STJ linear array, which shortened the total acquisition time. ©2006 IEEE.

DOI： 10.1109/ICIMW.2006.368603

Applications of neutron refractive optical devices

Shimizu H.

Physica B Condensed Matter 385-386 巻頁： 989 - 994 2006年11月

出版者・発行元：Physica B Condensed Matter

Refractive optics has relatively large effective apertures compared with reflective optics and they are suitable for two-dimensional beam focusing. There are two types of refractive optics, which are compound refractive optics and magnetic optics. Both of them are applied to extend the accessible q-range in small-angle scattering of cold neutron. We discuss possibilities to apply magnetic optics at pulsed neutron sources. We also discuss the possibility to obtain an extremely high neutron polarization using the spin-selectivity of magnetic optics. © 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2006.05.318

Simulation study of neutron focusing effect on a pulsed sextupole magnetic lens using PHITS code

Mitsutake, I; Kiyanagi, Y; Kamiyama, T; Nitta, K; Suzuki, J; Oku, T; Shimizu, HM

PHYSICA B-CONDENSED MATTER 385-86 巻頁： 1229 - 1231 2006年11月

出版者・発行元：Physica B Condensed Matter

We have performed various simulation calculations for a pulsed sextupole magnetic lens to look for the best condition of focusing experiments, assuming conditions of the pulse magnetic lens now under construction. Here, we placed a slit between the pulsed neutron moderator and the neutron lens, in order to see the focusing effect clearly. For the simulation, we used PHITS code to know influences of the position of the slit on the intensity of focused neutron beam, the focal point, and the broadening of the focal point. Increase of the distance of the slit from the source resulted in the decrease of the peak intensity of neutron beam at the focal point. Full-width at half-maximum of the neutron distribution along the incident beam direction around the focal point, broadened with increasing the distance, and the focal distance also became longer. The intensity ratios defined by (intensity with magnetic field)/(intensity without magnetic field) also increased with decreasing the distance. Therefore, it is better to set a slit near the moderator. © 2006.

DOI： 10.1016/j.physb.2006.05.417

Small-angle characterization of multimetric variants related to Parkinson's disease of ubiquitin carboxyl-terminal hydrolase L1 in water by small-angle neutron scattering

Naito S., Mochizuki H., Yasuda T., Mizuno Y., Furusaka M., Ikeda S., Shimizu H.M., Adachi T., Suzuki J., Fujiwara S., Okada Y., Mshikawa K., Aoki S., Wada K.

Polymer Preprints Japan 55 巻 ( 1 ) 2006年10月

出版者・発行元：Polymer Preprints Japan

UCH-L1 is a neuro-specific multiple functional enzyme. To examine the relationship between PD and the configuration of UCH-L1 variants [wild-type, I93M (linked to familial PD), and SI8Y (linked to reduced risk of PD)], we examined their structures in dueterized water directly using small-angle neutron scattering. We demonstrate that these were all self-assembled dimers. The wild-type was a rotating ellipsoidal dimer although the crystal structure predicted from the UCH-L3 was globular. The globular form of the monomeric component deformed by the I93M mutation. Conversely, the SI8Y polymorphism promoted the globularity. The morphological structures of UCH-L1 variants and PD exhibit good pathological correlation.

Design study of superconducting sextupole magnet using HTS coated conductor for neutron-focusing device

Tosaka, T; Koyanagi, K; Ono, M; Kuriyama, T; Watanabe, I; Tsuchiya, K; Suzuki, J; Adachi, T; Shimizu, HM

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 445 巻 ( 1-2 ) 頁： 1095 - 1098 2006年10月

出版者・発行元：Physica C Superconductivity and Its Applications

We performed a design study of sextupole magnet using high temperature superconducting (HTS) wires. The sextupole magnet is used as a focusing lens for neutron-focusing devices. A neutron-focusing device is desired to have a large aperture and a high magnetic field gradient of G, where G = 2B/r<sup>2</sup>, B is the magnetic field and r is a distance from the sextupole magnet axis. Superconducting magnets offer promising prospects to meet the demands of a neutron-focusing device. Recently NbTi coils of low temperature superconducting (LTS) have been developed for a sextupole magnet with a 46.8 mm aperture. The maximum magnetic field gradient G of this magnet is 9480 T/m<sup>2</sup> at 4.2 K and 12,800 T/m<sup>2</sup>at 1.8 K. On the other hand, rapid progress on second generation HTS wire has been made in increasing the performance of critical current and in demonstrating a long length. The second generation HTS wire is referred to as coated conductor. It consists of tape-shaped base upon which a thin coating of superconductor, usually YBCO, is deposited or grown. This paper describes a design study of sextupole magnet using coated conductors. © 2006.

DOI： 10.1016/j.physc.2006.05.043

Performance of a multi-anode photomultiplier employing a weak electrostatic focusing system (Hamamatsu R8900 series)

Kawasaki, Y; Bertaina, ME; Sakaki, N; Shimizu, HM; Inoue, N; Hasegawa, S; Ohtsu, I; Adachi, T; Ebisuzaki, T; Hirota, K; Ikeda, K; Kajino, F; Morishima, T; Nagano, M; Sato, M; Sawabe, T; Shibata, T; Shinohara, T; Takeda, M; Takizawa, Y; Uchihori, Y; Wada, Y

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 564 巻 ( 1 ) 頁： 378 - 394 2006年8月

出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

We have developed and tested a new type of multi-anode photomultiplier: Hamamatsu R8900-03 series. The main feature of the R8900-03 series is a highly sensitive surface: ∼ 83 % of the physical area. In this paper we report on the results of measurements we performed to check several parameters of this new type of photomultiplier. R8900-03 photomultipliers are devices suitable for experiments where large collection area and uniform detection efficiency are essential characteristics. © 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2006.03.010

低速中性子光学 Open Access

清水裕彦

加速器 3 巻 ( 2 ) 頁： 128 - 136 2006年7月

Nb<sub>3</sub>Sn sextupole magnet for neutron beam focusing

Okamoto, K; Nakamura, K; Seki, Y; Ohno, M; Takao, T; Mitsuda, C; Ohuchi, N; Shintomi, T; Tsuchiya, K; Adachi, T; Shimizu, H; Oku, T; Suzuki, J; Kimura, S; Hanai, S; Urata, M; Watanabe, I

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 16 巻 ( 2 ) 頁： 362 - 365 2006年6月

出版者・発行元：IEEE Transactions on Applied Superconductivity

In order to obtain a high-intensity neutron beam for neutron scattering experiments, strong sextupole magnets with large apertures are useful as a focusing element. We have started the development of a Nb<inf>3</inf>Sn sextupole magnet for this purpose. The design field strength of the sextupole is 12780 T/m<sup>2</sup> and the aperture of the coil is 46 mm in diameter. As a first step of the development, three model coils have been made in order to learn about Nb<inf>3</inf>Sn technology and to evaluate the fabrication techniques. Single-pole tests of these coils have been performed to assess the conductor stability and training behavior of the Nb<inf>3</inf>Sn coils. This paper describes the design of the magnet, the fabrication of the model coils and the results of single-pole tests. © 2006 IEEE.

DOI： 10.1109/TASC.2006.873329

Terahertz imaging with a direct detector based on superconducting tunnel junctions

Ariyoshi, S; Otani, C; Dobroiu, A; Sato, H; Kawase, K; Shimizu, HM; Taino, T; Matsuo, H

APPLIED PHYSICS LETTERS 88 巻 ( 20 ) 2006年5月

出版者・発行元：Applied Physics Letters

We demonstrated terahertz imaging using a direct detector based on niobium superconducting tunnel junctions (STJs). The detector is composed of linearly distributed junctions placed on a superconducting microstrip line and is integrated on two wings of a log-periodic antenna. We succeeded nondestructive imaging for an integrated-circuit card and dry material using the detector around its sensitivity peak (∼0.66 THz). The dynamic range was measured to be higher than 4× 107 (76 dB). Thus, the STJ detector is applicable to high-sensitivity and high-speed terahertz imaging for various nondestructive inspection applications. © 2006 American Institute of Physics.

DOI： 10.1063/1.2204842

A broadband terahertz detector using a superconducting tunnel junction

Taino, T; Nakano, R; Yoshimura, S; Myoren, H; Takada, S; Otani, C; Ariyoshi, S; Shibuya, T; Kawase, K; Sato, H; Shimizu, HM

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 559 巻 ( 2 ) 頁： 751 - 753 2006年4月

出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

We have proposed and demonstrated a new broadband terahertz (THz) wave detector using a superconducting tunnel junction (STJ) fabricated on LiNbO<inf>3</inf>, LiTaO<inf>3</inf>, and sapphire substrates. These substrates have relatively high absorption efficiency for THz waves, and we have expected that incident THz waves from substrate side are absorbed and that generate many THz phonons which break Cooper pairs in the base superconductor electrode of the STJ. Using a frequency-tunable THz pulse source in 1-2 THz, we have confirmed that the current signal corresponding to the THz input was observed. In addition, we found two current components with different timescales for the first time. We interpret that the slow component corresponds to phonons absorbed with the substrate and that the fast one corresponds to the directly absorbed photons with the superconductor electrode of the STJs. © 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2005.12.207

Detection of α particles with a superconducting series-junction detector

Kurakado, M; Kirk, EC; Sato, H; Jerjen, I; Shiki, S; Shimizu, HM; Zehnder, A; Taniguchi, K

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 559 巻 ( 2 ) 頁： 480 - 482 2006年4月

出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

Alpha particles were measured with a superconducting series-junction detector. The effective area and thickness of the detector are given by a circle of 0.5 mm in diameter and 500 μm Al<inf>2</inf>O<inf>3</inf>, respectively. The risetime of the charge-sensitive preamplifiers, i.e. charge collection time of the detector, was about 5 μs. An energy resolution of 0.35% was obtained for 5.5 MeV α particles. © 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2005.12.080

Development of a low energy particle detector using a superconducting transition edge sensor

Ohno, M; Sato, H; Ikeda, T; Shimizu, HM

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 559 巻 ( 2 ) 頁： 573 - 575 2006年4月

出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

It is possible for a superconductive transition edge sensor (TES) to detect directly the low energy proton generated in the neutron beta decay. The precision measurement of the proton spectrum is important to test the prediction of the Standard Model of electroweak interaction. Therefore, we are developing a TES microcalorimeter with a large effective area for a proton detector. Our first TES device consists of four-pixels using a Ti/Au bilayer. All pixels are parallel biased and X-rays from a <sup>55</sup>Fe source are detected successfully. © 2005 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2005.12.058

Refraction as a means of encoding wavelength for neutron reflectometry

Cubitt, R; Shimizu, HM; Ikeda, K; Torikai, N

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 558 巻 ( 2 ) 頁： 547 - 550 2006年3月

出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

Neutron reflectometry is a well-established technique used to analyze the structure of interfaces as a function of depth normal to the surface. On a continuous source of neutrons, such as a reactor, the measurement can be done at a fixed incident angle and a white beam with the neutron wavelength encoded by the use of choppers to measure the time of flight. Although providing a certain flexibility in wavelength resolution, choppers have low transmission. This paper explores the possibility of using refraction to encode neutron wavelength opening the possibility of reactor sources to use almost the full-time-averaged neutron flux available and hence, increase the performance of neutron reflectometers by orders of magnitude. © 2005 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2005.12.045

Characterization of multimetric variants of ubiquitin carboxyl-terminal hydrolase L1 in water by small-angle neutron scattering

Naito, S; Mochizuki, H; Yasuda, T; Mizuno, Y; Furusaka, M; Ikeda, S; Adachi, T; Shimizu, HM; Suzuki, J; Fujiwara, S; Okada, T; Nishikawa, K; Aoki, S; Wada, K

BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS 339 巻 ( 2 ) 頁： 717 - 725 2006年1月

出版者・発行元：Biochemical and Biophysical Research Communications

Here, we illustrated that the morphological structures of ubiquitin carboxyl-terminal hydrolase L1 (UCH-L1) variants and Parkinson's disease (PD) exhibit good pathological correlation by a small-angle neutron scattering (SANS). UCH-L1 is a neuro-specific multiple functional enzyme, deubiquitinating, ubiquityl ligase, and also involved in stabilization of mono-ubiquitin. To examine the relationship between multiple functions of UCH-L1 and the configuration of its variants [wild-type, I93M (linked to familial Parkinson's disease), and S18Y (linked to reduced risk of Parkinson's disease)], in this report, we proposed that these were all self-assembled dimers by an application of a rotating ellipsoidal model; the configurations of these dimers were quite different. The wild-type was a rotating ellipsoidal. The globular form of the monomeric component deformed by the I93M mutation. Conversely, the S18Y polymorphism promoted the globularity. Thus, the multiple functional balance is closely linked to the intermolecular interactions between the UCH-L1 monomer and the final dimeric configuration. © 2005 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.bbrc.2005.11.066

Gd系薄膜シンチレータの開発(3)

山口達, 春名潤, 金子純一, 須佐憲三, 三浦誠司, 八木康洋, 川村宗範, 奥隆之, 藤田文行, 本間彰, 石橋浩之, 澤村晃子, 古坂道弘, 清水裕彦, 鬼柳善明

日本原子力学会　年会・大会予稿集 2006s 巻 ( 0 ) 頁： 64 - 64 2006年

出版者・発行元：一般社団法人日本原子力学会

中性子用薄膜シンチレータへの応用を念頭に置き、ガドリニウムオルソシリケート(Gd2SiO5)、ガドリニウムパイロシリケート(Gd2Si2O7)を合成し、発光特性評価ならびに構造解析を行った。Gd2Si2O7にCeを10%ドープしたところ結晶がF構造をとり、高い発光強度を示した。

DOI： 10.11561/aesj.2006s.0.64.0

Gd系薄膜シンチレータの開発(2)

土田昇平, 春名潤, 金子純一, 須佐憲三, 三浦誠司, 奥隆之, 藤田文行, 本間彰, 澤村晃子, 古坂道弘, 清水裕彦, 鬼柳善明

日本原子力学会　年会・大会予稿集 2006s 巻 ( 0 ) 頁： 65 - 65 2006年

出版者・発行元：一般社団法人日本原子力学会

中性子散乱実験等への適用を目指し、厚さ30μm程度のGd系薄膜シンチレータの開発を目指している。本研究においてはGSO系粉体シンチレータを焼結することで薄膜化を試みた。焼結によりGSO(Gd2SiO5)は発光能力を失ったもののGPS(Gd2Si2O7)は発光能力を維持し、非常に丈夫で透明度の高い薄膜シンチレータの製作に成功した。

DOI： 10.11561/aesj.2006s.0.65.0

20aSF-4 4重極磁石を用いた高偏極中性子ビームの生成と基礎物理への応用(20aSF 対称性・基礎物理・核モーメント,実験核物理領域) Open Access

山田悟, 奥隆之, 三島賢二, 佐藤広海, 広田克也, 森嶋隆裕, 大野雅史, 篠原武尚, 鈴木淳市, 清水裕彦

日本物理学会講演概要集 61.2.1 巻 ( 0 ) 頁： 29 2006年

30aWD-5 超伝導転移端温度計(TES)を用いた低エネルギー粒子線検出器の開発(3)(30aWD 対称性・基礎物理,実験核物理領域) Open Access

大野雅史, 佐藤広海, 森嶋隆裕, 三島賢二, 池田時浩, 山田悟, 清水裕彦

日本物理学会講演概要集 61.1.1 巻 ( 0 ) 頁： 73 2006年

30pXD-7 多重積層放物面型熱中性子収束光学素子の集光特性(30pXD X線・粒子線(中性子・粒子線),領域10(誘電体,格子欠陥,X線・粒子線,フォノン物性)) Open Access

池田一昭, 篠原武尚, 広田克也, 佐藤広海, 清水裕彦, 日野正裕, 奥隆之, 鈴木淳市, 曽山和彦, 大山研司, 平賀晴弘

日本物理学会講演概要集 61.1.4 巻 ( 0 ) 頁： 965 2006年

30pXD-6 Aharonov-Casher効果精密測定のためのJamin型多層膜冷中性子干渉計の開発(30pXD X線・粒子線(中性子・粒子線),領域10(誘電体,格子欠陥,X線・粒子線,フォノン物性)) Open Access

関義親, 舟橋春彦, 竹谷薫, 日野正裕, 北口雅暁, 大竹淑恵, 清水裕彦

日本物理学会講演概要集 61.1.4 巻 ( 0 ) 頁： 965 2006年

30pXD-5 磁場勾配を用いた中性子スピン偏極デバイスの開発(30pXD X線・粒子線(中性子・粒子線),領域10(誘電体,格子欠陥,X線・粒子線,フォノン物性)) Open Access

奥隆之, 山田悟, 鈴木淳市, 三島賢二, 篠原武尚, 池田一昭, 広田克也, 佐藤広海, 清水裕彦

日本物理学会講演概要集 61.1.4 巻 ( 0 ) 頁： 965 2006年

Development of Mach-Zehnder interferometer and "Coherent beam steering" technique for cold neutrons

Taketani K., Funahashi H., Seki Y., Hino M., Kitaguchi M., Maruyama R., Otake Y., Shimizu H.M.

Proceedings of the 8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology Isqm Tokyo 2005 頁： 282 - 285 2006年

出版者・発行元：Proceedings of the 8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology Isqm Tokyo 2005

We are developing multilayer interferometer of Mach-Zehnder type for cold neutrons. To fulfill severe requirements for aligning the four mirrors, we utilize six solid-etalon-plates and a high precision flat base plate. New devices making use of magnetic birefringence have been developed and demonstrated to be useful for fine adjustment of superposition between the two paths labeled with neutron spin.

DOI： 10.1142/9789812773210_0060

Polyimide Buffer Layer for STJ Photon Detector Open Access

Taino T., Yoshida M., Narisawa M., Myoren H., Kikuchi K., Nakagawa H., Aoyagi M., Sato H., Shimizu H. M., Takada S.

7TH EUROPEAN CONFERENCE ON APPLIED SUPERCONDUCTIVITY (EUCAS'05) 43 巻頁： 1319 - 1321 2006年

THz imaging with a linear array detector based on superconducting tunnel junctions

Ariyoshi, S; Otani, C; Dobroiu, A; Matsuo, H; Sato, H; Taino, T; Kawase, K; Shimizu, HM

CONFERENCE DIGEST OF THE 2006 JOINT 31ST INTERNATIONAL CONFERENCE ON INFRARED AND MILLIMETER WAVES AND 14TH INTERNATIONAL CONFERENCE ON TERAHERTZ ELECTRONICS 頁： 395 - 395 2006年

Upgrade of the 32 m small-angle neutron scattering instrument SANS-U

Okabe, S; Nagao, M; Karino, T; Watanabe, S; Adachi, T; Shimizu, H; Shibayama, M

JOURNAL OF APPLIED CRYSTALLOGRAPHY 38 巻 ( 6 ) 頁： 1035 - 1037 2005年12月

出版者・発行元：Journal of Applied Crystallography

The small-angle neutron scattering instrument, SANS-U, owned by the Institute for Solid State Physics, The University of Tokyo, has been upgraded. The SANS-U is a 32 m SANS instrument installed in 1991 at the guide hall of the JRR-3M research reactor of the Japan Atomic Energy Research Institute, and has been serving for inter-university cooperative research use since 1993. The major upgrades include (i) replacement of the two-dimensional area detector by a multi-wire type position-sensitive proportional counter, (ii) renewal of the operating system from a VAX and sequencers to an integrated PXI system controlled by LabVIEW-RT software, (iii) a focusing collimation system, and (iv) a variety of accessory equipment. These upgrades provide a wide dynamic range of neutron counting, user-friendly operation and real-time circular averaging of two-dimensional data. © 2005 International Union of Crystallography - all rights reserved.

DOI： 10.1107/S0021889805029201

Detection of direct and indirect terahertz waves using a Nb-based superconducting tunnel junction

Otani C., Nakano R., Taino T., Shibuya T., Ariyoshi S., Myoren H., Sato H., Shimizu H.M., Takada S., Kawase K.

Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics 2005 Irmmw Thz 2005 1 巻頁： 263 - 264 2005年12月

出版者・発行元：Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics 2005 Irmmw Thz 2005

We are developing a broadband THz detectors using Nb-based superconducting tunnel junctions. We found two components in a current signal for 1-2 THz pulse input. From the comparison of results obtained for the signals, the frequency response for the different size of STJs and the STJs fabricated on different substrate materials, we demonstrate that they correspond to photons absorbed with the superconductor electrode (refered as 'direct' component) and phonons generated by photons absorbed with the substrate (refered as 'phonon-mediated' component). © 2005 IEEE.

Small-angle neutron scattering study on the relation between abnormal brain protein structure and neuropathy; mechanism of the abnormal aggregation of microtubule-associated tau

Naito S., Mochizuki H., Yasuda T., Mizuno Y., Furusaka M., Ikeda S., Adachi T., Shimizu H.M., Suzuki J., Fujiwara S.

Polymer Preprints Japan 54 巻 ( 2 ) 頁： 4881 - 4882 2005年12月

出版者・発行元：Polymer Preprints Japan

Tauopacy is the abnormal aggregation of tau which is one of the microtubule-associated proteins often observed in Alzheimer's disease and Parkinson's disease brain. Such an abnormal protein aggregation in cells causes cellular degeneration and death, and finally ends up with grave disorders. We synthesized human recombinant human tau and evaluated the structure in water by dynamic light scattering (DLS) and small-angle neutron scattering (SANS). SANS showed tau (46Kda,consisting of 448a.a.) behaved in water as if it were originally and highly polymerized rod-like fibers although the SDS-page showed tau was refined to a single molecule. After we confirmed tau heated with reducing agent showed a single dispersion by DLS, we observed the structure by SANS equipped with 40 fresnel lenses at a lower concentration, C*. The radius of gyration of the tau cluster was estimated to be 272 Å from the Gunier analysis on the SANS profile in the lower q ranges. We clarified that normal tau proteins form a huge globule cluster in water by self-assembly, furthermore, they form a fibril by intermolecular cystine cross-linking under oxidative environment.

高温超伝導薄膜線材を使った中性子収束用6極マグネットの開発

小柳圭, 戸坂泰造, 小野通隆, 栗山透, 渡辺郁男, 土屋清澄, 鈴木淳市, 安達智宏, 清水裕彦

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 73 巻頁： 246 2005年11月

The focal surface of the EUSO telescope

Kawasaki, Y; Bertaina, M; Ebisuzaki, T; Kajino, F; Miyazaki, Y; Nagano, M; Sakaki, N; Sato, M; Shimizu, HM; Takizawa, Y; Ameri, M; Catalano, O; Cuneo, S; Fontanelli, F; Gracco, V; Musico, P; Pallavicini, M; Petrolini, A; Pratolongo, R; Sannino, M; Bleurvacq, N; Cadoux, F; Chapron, C; Gorodetzky, P; Nedelec, P; Patzak, T; Plagnol, E; Takahashi, Y

INTERNATIONAL JOURNAL OF MODERN PHYSICS A 20 巻 ( 29 ) 頁： 6890 - 6893 2005年11月

Global measurement of lightning-associated transient luminous events (TLEs) from space

Sato, M; Ebisuzaki, T; Takizawa, Y; Kawasaki, Y; Sakaki, N; Bertaina, M; Shimizu, HM; Takahashi, Y; Adachi, T

INTERNATIONAL JOURNAL OF MODERN PHYSICS A 20 巻 ( 29 ) 頁： 6903 - 6905 2005年11月

出版者・発行元：International Journal of Modern Physics A

In this study we present possibility of continuous measurements of lightning- associated transient luminous events (sprites, elves and blue jets) from the ISS altitude using the EUSO telescope. From global lightning data we estimated possible detection rates of lightning and TLEs. We also estimated photon numbers and optical spectra of TLEs in the near-ultraviolet region (300-400 nm) where the fluorescence emission caused by CRs exists. These results imply that EUSO has enough capabilities to monitor not only super-GZK CRs but also global lightning and TLEs. © World Scientific Publishing Company.

DOI： 10.1142/S0217751X05030454

Photomultiplier development and wavelength shifter manufacturing to increase the detection of faint fluorescence signals

Bertaina, M; Ebisuzaki, T; Hirota, K; Kawasaki, Y; Sakaki, N; Sato, M; Shimizu, HM; Shinohara, T; Takizawa, Y

INTERNATIONAL JOURNAL OF MODERN PHYSICS A 20 巻 ( 29 ) 頁： 6872 - 6874 2005年11月

出版者・発行元：International Journal of Modern Physics A

RIKEN has developed in collaboration with Hamamatsu a new type of Multi Anode Photomultiplier (MAPMT), R8900 series, with a large sensitive area of ∼83% of the physical surface. The performance of R8900 is reviewed in the following. RIKEN has also manufactured a new type of wavelength shifter (w.s.) film to shift near-UV light (330 ÷ 400 nm) to visible one. This film uses POPOP as a shifter and EPO-TEX as a substrate. The quantum efficiency of the film reaches ∼80%. © World Scientific Publishing Company.

DOI： 10.1142/S0217751X05030351

Development of terahertz wave detector using superconducting tunnel junction

Taino, T; Hoshino, K; Nakano, R; Otani, C; Myoren, H; Kawase, K; Shibuya, T; Sato, H; Shimizu, HM; Takada, S

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 426 巻 ( II ) 頁： 1731 - 1735 2005年10月

出版者・発行元：Physica C Superconductivity and Its Applications

We have developed a new terahertz (THz) wave detector using an Nb-based superconducting tunnel junction (STJ). The STJ consists of a Nb/Al/AlO <inf>x</inf>/Al/Nb structure on a single-crystal LiNbO<inf>3</inf> substrate. Using LiNbO<inf>3</inf> as a substrate, an irradiating THz wave is converted to phonons in LiNbO<inf>3</inf>, which has a relatively high absorption coefficient. The phonons propagating in the substrate reach the Nb base electrode of the STJ and break Cooper pairs. As a result, the THz wave can be detected as tunneling current signals in the STJ. THz waves from a widely tunable THz-wave parametric oscillator (TPO) were irradiated on to the STJ, which acted as a THz wave detector. The STJs were cooled to an operating temperature of 0.4 K using a <sup>3</sup>He cryostat. We have observed STJ signals related to THz wave irradiations. In this paper, fabrication processes and characteristics of THz wave detectors using STJs are also discussed. © 2005 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physc.2005.02.137

Proton polarization with naphthalene crystals by integrated solid effect on photoexcited triplet state

Iinuma, M; Takahashi, Y; Shaké, I; Oda, M; Shimizu, HM; Masaike, A; Yabuzaki, T

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 74 巻 ( 9 ) 頁： 2622 - 2630 2005年9月

記述言語：英語出版者・発行元：一般社団法人日本物理学会

We have carried out detailed systematic studies of relaxation effects, which contribute to a significant improvement in proton polarization in a single crystal of naphthalene doped with pentacene. The experiments have been performed in a magnetic field of 3 kG at room temperature or at 77 K and with a pulsed dye laser or a pulsed N<inf>2</inf> laser. We have found that a relaxation rate in the presence of irradiation with visible light (λ = 595 nm) is much smaller than that with ultraviolet light (λ = 337 nm) at room temperature, although the absorption rate of visible light is much larger than that of ultraviolet light. By cooling the crystal, the slow motion of the naphthalene molecules, which is a dominant relaxation process, can be suppressed. Surprisingly, we have found that the relaxation time at 77 K in the presence of the dye laser becomes long, but still depends on the laser power. Our investigation has also indicated that both the longer relaxation time and the irradiation with the dye laser lead to a great improvement in the polarization of protons in the bulk of a crystal from 0.5% at room temperature to 32% at 77 K. ©2005 The Physical Society of Japan.

DOI： 10.1143/JPSJ.74.2622

Proton polarization with <i>p</i>-terphenyl crystal by integrated solid effect on photoexcited triplet state

Iinuma, M; Takahashi, Y; Shaké, I; Oda, M; Masaike, A; Yabuzaki, T; Shimizu, HM

JOURNAL OF MAGNETIC RESONANCE 175 巻 ( 2 ) 頁： 235 - 241 2005年8月

出版者・発行元：Journal of Magnetic Resonance

We have carried out the experiments for polarizing protons in single crystals of p-terphenyl doped with 0.1 mol% pentacene. The experiments have been performed in a magnetic field of 3 kG at room temperature or at 77 K. We obtained the polarization of 1.3% for protons in bulk at room temperature by using a pulsed dye-laser with the wavelength of 590 nm, the average power of 150 mW, and the repetition rate of 50 Hz. The polarization at 77 K reached 18% by irradiation with the dye-laser of 500 mW, 50 Hz and the same wavelength. The polarization of protons was measured by the neutron transmission method also. The result was consistent with that measured by the nuclear magnetic resonance. © 2005 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.jmr.2005.04.011

A broad-band THz radiation detector using a Nb-based superconducting tunnel junction

Otani, C; Taino, T; Nakano, R; Hoshino, K; Shibuya, I; Myoren, H; Ariyoshi, S; Sato, H; Shimizu, HM; Takada, S; Kawase, K

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 15 巻 ( 2 ) 頁： 591 - 594 2005年6月

出版者・発行元：IEEE Transactions on Applied Superconductivity

We have proposed and been developing a new broad-band terahertz (THz) radiation detector using a Nb-based superconducting tunnel junction (STJ). The STJ's were fabricated on LiNbO<inf>3</inf> and LiTaO<inf>3</inf> mono-crystal substrates. We radiated monochromatic THz pulses in the range 1-2 THz with the pulse repetition rate of 49 Hz, and successfully detected the corresponding periodic signals via a charge-sensitive preamplifier. The current signal obtained by the derivative of the output signal gave the time response of about 15-20 microseconds. The frequency response was compared with that of a conventional pyro-electric sensor. We found their frequency response showed the similar shape in frequency, demonstrating the flat response of the STJ detector in 1-2 THz. These results show that the detector can be used as a broad-band THz and far-infrared radiation detector above the frequency corresponding to the energy gap of the superconductor used for the base electrode. © 2005 IEEE.

DOI： 10.1109/TASC.2005.849950

X-ray detection using superconducting tunnel junctions with polyimide insulation layer

Yoshida, M; Hoshino, K; Taino, T; Myoren, H; Takada, S; Kikuchi, K; Nakagawa, H; Aoyagi, M; Sato, H; Shimizu, HM

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 15 巻 ( 2 ) 頁： 606 - 608 2005年6月

出版者・発行元：IEEE Transactions on Applied Superconductivity

We have fabricated Nb-based superconducting tunnel junctions (STJs) with Al trapping layers using the photosensitive polyimide insulation layer for X-ray detector. It is possible to simplify the fabrication process of the STJs, because the photosensitive polyimide is used as the insulation layer instead of conventional inorganic insulation films without an etching process in a vacuum chamber. The polyimide insulation layer expects to be stable for thermal cycling between 0.3 K and room temperature. The preliminary experiments of 5.9 keV radiation shows the energy resolution of 86 eV. © 2005 IEEE.

DOI： 10.1109/TASC.2005.849955

Characterization of an STJ-based direct detector of submillimeter waves

Ariyoshi, S; Matsuo, H; Otani, C; Sato, H; Shimizu, HM; Kawase, K; Noguchi, T

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 15 巻 ( 2 ) 頁： 920 - 923 2005年6月

出版者・発行元：IEEE Transactions on Applied Superconductivity

We have developed submillimeter-wave direct detectors employing niobium-based superconducting tunnel junctions (STJs), with broadband spectral response, high sensitivity and imaging capability. Spectral response peaked at 650 GHz with a fractional bandwidth of 14 percent, which fits one of the important atmospheric windows for an astronomical project. We also confirmed the linearity of the detector response in the dynamic range greater than 10 <sup>6</sup>. The measured coupling efficiency was about 0.2, which was lower than the expected value of 0.5. The measured noise current of the detector was 10 fA/√Hz, which agreed with the shot noise from the residual leakage current of 100 pA at 0.3 K. Resultant noise equivalent power (NEP) is 1.6 × 10<sup>-16</sup> W/√Hz, that is less than the background photon fluctuation limit for ground-based submillimeter-wave observations. © 2005 IEEE.

DOI： 10.1109/TASC.2005.850119

Characteristics of superconducting series array tunnel junctions for heavy ions

Sato, H; Kurakado, M; Takizawa, Y; Shiki, S; Ohno, M; Shimizu, HM; Morita, K; Morimoto, K; Kaji, D; Akiyama, T

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 15 巻 ( 2 ) 頁： 595 - 598 2005年6月

出版者・発行元：IEEE Transactions on Applied Superconductivity

Heavy ion detection experiments were carried out with superconducting series array tunnel junctions. <sup>40</sup>Ar beam from linear accelerator was introduced to a cryostat and stopped in a substrate on which series array tunnel junctions were fabricated. An energy resolution of 4.2% was obtained for 191 MeV <sup>40</sup> Ar, but linearity proved poor for energy ranges from 136 MeV to 191 MeV. © 2005 IEEE.

DOI： 10.1109/TASC.2005.849951

The effect of X-ray irradiating superconducting tunnel junctions on Al 2O3 and LiNbO3 substrates

Taino T., Hoshino K., Nakano R., Otani C., Myoren H., Kawase K., Sato H., Shimizu H.M., Takada S.

IEEE Transactions on Applied Superconductivity 15 巻 ( 2 PART I ) 頁： 599 - 601 2005年6月

出版者・発行元：IEEE Transactions on Applied Superconductivity

We have developed a phononmediated radiation detector using Nb-based superconducting tunnel junctions (STJs). The STJs are fabricated on a substrate as an absorber of the radiation, and a substantial amount of emergent phonons with an energy above the energy gap are detected. The performance of the detector depends on the collection efficiency of the phonons. A selection of an appropriate substrate is required for optimizing the detector performance. We fabricated Nb-based STJs on a Al<inf>2</inf>O<inf>3</inf> and a LiNbO <inf>3</inf> substrates, and compared the pulse heights of substrate phonon events due to X-ray irradiation to the substrates. We found that the maximum pulse height of the phonon events for the LiNbO<inf>3</inf> substrate was about twice of that for the Al<inf>2</inf>O<inf>3</inf> substrate, so that these spectra which was obtained from two STJs showed different shapes, especially the peak due to phonon events. © 2005 IEEE.

DOI： 10.1109/TASC.2005.849953

中性子磁気レンズ用Nb_3Snコイルの開発(2)

岡本佳祐, 中村一也, 関佳隆, 大野雅人, 高尾智明, 大内徳人, 新冨孝和, 土屋清澄, 安達智宏, 清水裕彦, 奥隆之, 鈴木淳市, 木村諭, 花井哲, 浦田昌身, 渡辺郁男

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 72 巻頁： 212 2005年5月

CS-7-3 基板吸収型STJ素子を用いたTHz波検出器(CS-7. 超伝導サブテラヘルツエレクトロニクス, エレクトロニクス2)

明連広昭, 中野蘭, 星野耕一, 吉村正太, 田井野徹, 大谷知行, 渋谷孝幸, 佐藤広海, 清水裕彦, 高田進, 川瀬晃道

電子情報通信学会総合大会講演論文集 2005 巻 ( 2 ) 頁： "S - 13"-"S-14" 2005年3月

Detection of α particles with superconducting series-junction detectors - art. no. 083503

Kurakado, M; Sato, H; Takizawa, Y; Shiki, S; Shimizu, HM

APPLIED PHYSICS LETTERS 86 巻 ( 8 ) 頁： 1 - 3 2005年2月

出版者・発行元：Applied Physics Letters

Superconducting series-junction detectors present the possibility of highly practical radiation detectors with high detection efficiencies, high count rates, and high energy-resolution even for radiation that is difficult to detect efficiently with traditional radiation detectors. A series-junction detector with an effective volume of 8×8×0.4 mm3 has shown that the efficiency of signal charge production is high despite its large volume. The position dependence of signal heights of a series-junction detector with an effective area of 1.5×1.5 mm2 was corrected, and the energy resolution was improved from 2.9% to 0.42%. © 2005 American Institute of Physics.

DOI： 10.1063/1.1866509

Development of polarized neutron optics

Shimizu, HM; Oku, T; Suzuki, J; Furusaka, M; Kiyanagi, Y

PHYSICA B-CONDENSED MATTER 356 巻 ( 1-4 ) 頁： 121 - 125 2005年2月

A demonstration study of focusing geometry SANS using a magnetic lens

Oku, T; Suzuki, J; Sasao, H; Yamada, S; Furusaka, M; Adachi, T; Shinohara, T; Ikeda, K; Shimizu, HM

PHYSICA B-CONDENSED MATTER 356 巻 ( 1-4 ) 頁： 126 - 130 2005年2月

出版者・発行元：Physica B Condensed Matter

A demonstration study of focusing geometry small-angle neutron scattering (FSANS) experiment was successfully performed using a superconducting sextupole magnet as a neutron focusing device and a polarized cold neutron beam. The obtained small-angle neutron scattering intensities from monodispersed SiO <inf>2</inf> spherical particles were discussed in terms of the scattering function taking into account the q-resolution. © 2004 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2004.10.062

Transmission bender for polarizing neutrons

Krist, T; Peters, J; Shimizu, HM; Suzuki, J; Oku, T

PHYSICA B-CONDENSED MATTER 356 巻 ( 1-4 ) 頁： 197 - 200 2005年2月

出版者・発行元：Physica B Condensed Matter

A system of a polarizing solid state bender and a collimator was built and tested. The bender consists of a stack of thin silicon wafers coated with polarizing FeCo-Si supermirrors. The stack is deflected in the middle by one wafer thickness. Inserted in an unpolarized neutron beam this device works as a spin splitter by transmitting the spin down component without any change in its flight path and reflecting the spin up component. With a collimator behind the bender it can be selected which one of the spin components is transmitted. In this way a transmission polarizer for neutrons with wavelengths above 4 Å was built which has a total length of less than 10 cm. © 2004 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2004.10.076

Some experimental studies on time-of-flight radiography using a pulsed neutron source Open Access

Kiyanagi, Y; Sakamoto, N; Iwasa, H; Kamiyama, T; Hiraga, F; Sato, S; Sagehashi, H; Ino, T; Furusaka, M; Suzuki, J; Gorin, A; Manuilov, I; Ryazantsev, A; Kuroda, K; Sakai, K; Tokanai, F; Miyasaka, H; Adachi, T; Oku, T; Ikeda, K; Suzuki, S; Morimoto, K; Shimizu, HM

IEEE TRANSACTIONS ON NUCLEAR SCIENCE 52 巻 ( 1 ) 頁： 371 - 374 2005年2月

出版者・発行元：IEEE Transactions on Nuclear Science

We are developing a fiber type two-dimentional (2-D) position-sensitive detector having a spatial resolution less than 0.5 mm in order to use it in the time-of-flight (TOF) measurements. The detector performance was examined, and some experiments on the TOF radiography were performed using this detector. The results indicated that the detector could be applied successfully to the TOF measurement and that the TOF radiography was very useful since it gave more informative data than those obtained by the conventional radiography using a broad energy band. © 2005 IEEE.

DOI： 10.1109/TNS.2005.844299

Boron based oxide scintillation glass for neutron detection

Ishii, M; Kuwano, Y; Asai, T; Asaba, S; Kawamura, M; Senguttuvan, N; Hayashi, T; Kobayashi, M; Nikl, M; Hosoya, S; Sakai, K; Adachi, T; Oku, T; Shimizu, HM

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 537 巻 ( 1-2 ) 頁： 282 - 285 2005年1月

出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

The luminescence property of Ce-doped oxide glass having B and Li with large absorption coefficient for neutron was investigated by optical transmittance, alpha particle, and neutron irradiation. The light output of the B <inf>2</inf>O <inf>3</inf>-Li <inf>2</inf>O:CeO <inf>2</inf> glass system increased with the increase in B <inf>2</inf>O <inf>3</inf> and CeO <inf>2</inf>. It was observed that the decay time which showed composition dependence varied in the range 30-45 ns. Although the light output by neutron irradiation is 9.2% of Li-glass, low density and high neutron absorption with short decay time make this new boron-based glass scintillator useful for neutron detection. (c) 2001 Elsevier Science. All rights reserved © 2004 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2004.08.027

13pSE-2 重力場による超冷中性子の量子化状態測定 : 高位置分解能UCN測定器の開発(13pSE 超冷中性子/DAQ・トリガー,素粒子実験領域) Open Access

川崎真介, 佐貫智行, 大川英希, 園田真也, 駒宮幸男, 東保男, 久米達哉, 江波和宏, 日野正裕, 清水裕彦

日本物理学会講演概要集 60.2.1 巻 ( 0 ) 頁： 14 2005年

27aWH-3 超伝導転移端温度計(TES)を用いた低エネルギー粒子線検出器の開発(2)(検出器,実験核物理) Open Access

大野雅史, 佐藤広海, 滝澤慶之, 志岐成友, 倉門雅彦, 有吉誠一郎, 三島賢二, 池田時浩, 清水裕彦

日本物理学会講演概要集 60.1.1 巻 ( 0 ) 頁： 81 2005年

27aWH-1 中性子β崩壊測定の予備実験(検出器,実験核物理) Open Access

三島賢二, 山田悟, 広田克也, 篠原武尚, 志岐成友, 佐藤広海, 大野雅史, 鈴木淳市, 清水裕彦

日本物理学会講演概要集 60.1.1 巻 ( 0 ) 頁： 80 2005年

26pZA-5 SPring-8/LEPSビームラインでのπ^0,η光生成のphoton beam asymmetry の測定(中間子生成,ハドロン構造,実験核物理) Open Access

木野幸一, 石川貴嗣, 岡村憲有, 斉藤雄高, 清水筆, 鈴木耕拓, 米村博樹, 岩田高広, 川村知行, 田島靖久, 吉田浩司, 戸井裕也, 松田達郎, 内田誠, 郡英輝, 住浜水季, 長谷川勝一, 堀田智明, 松村徹, 中野貴志, 椎野裕樹, 藤村寿子, 新山雅之, 宮部学, 村松憲仁, 菅谷頼仁, 大橋裕二, 伊達伸, 依田哲彦, 都留常暉

日本物理学会講演概要集 60.1.1 巻 ( 0 ) 頁： 77 2005年

25aYS-2 放物面型多層膜スーパーミラーによる熱・冷中性子収束光学素子の開発(X線・粒子線(X線),領域10(誘電体, 格子欠陥, X線・粒子線, フォノン物性)) Open Access

池田一昭, 安達智宏, 篠原武尚, 森嶋隆裕, 広田克也, 三島賢二, 佐藤広海, 清水裕彦, 森田晋也, 郭建強, 鈴木亨, 渡邉裕, 上原嘉宏, 林偉民, 大森整, 日野正裕, 田崎誠司, 奥隆之, 鈴木淳市, 曽山和彦, 大山研司, 平賀晴弘

日本物理学会講演概要集 60.1.4 巻 ( 0 ) 頁： 907 2005年

24pWJ-11 重力場による超冷中性子の量子化状態の測定装置の開発(光検出器・ニュートリノ・他,素粒子論) Open Access

川崎真介, 佐貫智行, 大川英樹, 関口豊和, 駒宮幸男, 日野正裕, 清水裕彦, 東保夫, 久米達哉, 江波和宏

日本物理学会講演概要集 60.1.1 巻 ( 0 ) 頁： 22 2005年

13pSE-3 重力場による超冷中性子の量子化状態測定 : 半導体検出器の薄膜蒸着試験(13pSE 超冷中性子/DAQ・トリガー,素粒子実験領域) Open Access

園田真也, 川崎真介, 大川英希, 駒宮幸男, 日野正裕, 清水裕彦, 佐貫智行

日本物理学会講演概要集 60.2.1 巻 ( 0 ) 頁： 14 2005年

A possible cosmic ray source in TeV and EeV from the direction around the Cygnus Loop

Takeda M., Nagano M., Watanabe Y., Chikawa M., Fukushima M., Hayashida N., Honda K., Inoue N., Kadota K., Kakimoto F., Kamata K., Kawaguchi S., Kawakami S., Kawasaki Y., Kawasumi N., Mase K., Mizobuchi S., Ohoka H., Osone S., Sakaki N., Sakurai N., Sasano M., Shimizu H.M., Shinozaki K., Teshima M., Torii R., Tsushima I., Uchihori Y., Yamamoto T., Yoshida S., Yoshii H.

29th International Cosmic Ray Conference Icrc 2005 7 巻頁： 179 - 182 2005年

出版者・発行元：29th International Cosmic Ray Conference Icrc 2005

With the Akeno Giant Air Shower Array (AGASA), we published the small-scale anisotropy of cosmic rays with energies above 10<sup>19</sup> eV. Among them, a broad cluster - BC1 around (20<sup>h</sup> 50<sup>m</sup>, 32°) - has interesting characteristics: The time distribution of members of the BC1 cluster is burst-like around MJD50000 , and this cluster locates near the famous supernova remnant: the Cygnus Loop. From this BC1 direction, two observations from the Tibet and Milagro experiments have been reported. In this report, we summarize the results from the whole observation time of AGASA and the Akeno 1km<sup>2</sup> array experiment, and the relation with the observations from the Tibet and Milagro experiments is discussed.

Characteristics of multi-anode photomultiplier tube for the EUSO focal surface detector

Kawasaki Y., Bertaina M.E., Sakaki N., Sato M., Shimizu H.M., Takizawa Y., Uchihori Y., Inoue N., Ohtsu I., Inoue K., Sawabe T., Kajino F.

29th International Cosmic Ray Conference Icrc 2005 8 巻頁： 165 - 168 2005年

出版者・発行元：29th International Cosmic Ray Conference Icrc 2005

The focal surface of the EUSO telescope consists of a few hundred thousand of pixels of photo-detectors and detects air showers as mosaic images. The strongest requirement for the focal surface detector is the maximization of the photon detection efficiency together with the uniformity over the focal surface. We have developed a new type of multi-anode photomultiplier tube (MAPMT). The tatal photon detection efficiency has improved than before by about 2.1 times.

Development of elementary cell module for the EUSO focal surface detector Open Access

Takizawa Y., Kawasaki Y., Sato M., Bertaina M.E., Ebisuzaki T., Shimizu H.M., Sawabe T., Kajino F., Sato I., Takara H., Isono N., Ameri M., Cuneo S., Fontanelli F., Gracco V., Musico P., Pallavicini M., Petrolini A., Sannino M., Siccardi F., Thea A.

29th International Cosmic Ray Conference Icrc 2005 8 巻頁： 213 - 216 2005年

出版者・発行元：29th International Cosmic Ray Conference Icrc 2005

The Focal Surface detector of EUSO (Extreme Universe Space Observatory) consists of small autonomous functional units (elementary cell, EC) assembled in larger modules (Photo Detector Modules, PDM). Each EC is conceived as an array of 4 multianode photomultipliers (MAPMTs). We have developed EC structure for the current baseline of the multianode photomultiplier (MAPMT, R8900-M36). As the mechanical characteristics of the PDM structure (e.g. robustness to thermal and launch shocks, vibrations at launch) will affect the EC structure, we have also built a trial PDM, consisting of 36 MAPMTs (9 ECs) arranged in a cartesian layout. The purpose of such trial PDM is to develop and optimize the EC structure.

Development of a neutron detector based on a position-sensitive photomultiplier

Hirota, K; Shinohara, T; Ikeda, K; Mishima, K; Adachi, T; Morishima, T; Satoh, S; Oku, T; Yamada, S; Sasao, H; Suzuki, J; Shimizu, HM

PHYSICAL CHEMISTRY CHEMICAL PHYSICS 7 巻 ( 8 ) 頁： 1836 - 1838 2005年

出版者・発行元：Physical Chemistry Chemical Physics

A neutron scintillation detector based on a position-sensitive photomultiplier has been developed for neutron spin echo and small angle neutron scattering measurements. This photomultiplier has good spatial resolution, less than 1 mm<sup>2</sup>. The detection efficiency of gamma ray background is very low for using a thin ZnS/<sup>6</sup>LiF scintillator. The effective area of this detector is around 60 cm<sup>2</sup>. © The Owner Societies 2005.

DOI： 10.1039/b417838f

Detection of direct and indirect terahertz waves using a Nb-based superconducting tunnel junction

Otani, C; Nakano, R; Taino, T; Shibuya, T; Ariyoshi, S; Myoren, H; Sato, H; Shimizu, HM; Takada, S; Kawase, K

IRMMW-THz2005: The Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, Vols 1 and 2 頁： 263 - 264 2005年

Chemical composition of ultra-high energy cosmic rays estimated by muon measurement with AGASA

Shinozaki K., Chikawa M., Fukushima M., Hayashida N., Honda K., Inoue N., Kadota K., Kakimoto F., Kamata K., Kawaguchi S., Kawakami S., Kawasaki Y., Kawasumi N., Mase K., Mizobuchi S., Nagano M., Ohoka H., Osone S., Sakaki N., Sakurai N., Sasano M., Shimizu H.M., Takeda M., Teshima M., Torii R., Tsushima I., Uchihori Y., Yamamoto T., Yoshida S., Yoshii H.

29th International Cosmic Ray Conference Icrc 2005 7 巻頁： 151 - 154 2005年

出版者・発行元：29th International Cosmic Ray Conference Icrc 2005

The chemical composition of ultra-high energy cosmic rays (UHECRs; > 10<sup>19</sup> eV) is a key parameter to understand their nature and origin. In the Akeno Giant Air Shower Array (AGASA) experiment, we measured the muon density at 1000 m from the cores for 159 UHECR events. The data were interpreted by the recent CORSIKA simulation (version 6.203) with QGSJET01 and SIBYLL2.1 interaction models. The data is consistent with light components for the QGSJET model. No positive signature has been found for the gamma ray dominance. In the presentation at the conference we will report detailed results and comparisons with the results from other experiments.

Measurement and alleviation of subsurface damage in a thick-crystal neutron interferometer

Heacock Benjamin, Haun Robert, Hirota Katsuya, Hosobata Takuya, Huber Michael G., Jamer Michelle E., Kitaguchi Masaaki, Pushin Dmitry A., Shimizu Hirohiko, Taminiau Ivar, Yamagata Yutaka, Yamamoto Tomoki, Young Albert R.

ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES 75 巻頁： 833 - 841 2019年11月

New precise measurements of muonium hyperfine structure at J-PARC MUSE Open Access

Strasser P., Abe M., Aoki M., Choi S., Fukao Y., Higashi Y., Higuchi T., Iinuma H., Ikedo Y., Ishida K., Ito T., Ito T. U., Iwasaki M., Kadono R., Kamigaito O., Kanda S., Kawagoe K., Kawall D., Kawamura N., Kitaguchi M., Koda A., Kojima K. M., Kubo K., Matama M., Matsuda Y., Matsudate Y., Mibe T., Miyake Y., Mizutani T., Nagamine K., Nishimura S., Ogitsu T., Saito N., Sasaki K., Seo S., Shimizu H. M., Shimomura K., Suchara T., Tajima M., Tanaka K. S., Tanaka T., Tojo J., Tomono D., Torii H. A., Torikai E., Toyoda A., Tsutsumi Y., Ueno K., Ueno Y., Yagi D., Yamamoto A., Yamanaka T., Yamazaki T., Yasuda H., Yoshida M., Yoshioka T.

QUANTUM TECHNOLOGY INTERNATIONAL CONFERENCE 2018 (QTECH 2018) 198 巻 2019年

EUSO-TA - First results from a ground-based EUSO telescope Open Access

Abdellaoui, G; Abe, S; Adams, JH ; Ahriche, A; Allard, D; Allen, L; Alonso, G; Anchordoqui, L; Anzalone, A; Arai, Y; Asano, K; Attallah, R; Attoui, H; Pernas, M; Bacholle, S; Bakiri, M; Baragatti, P; Barrillon, P; Bartocci, S; Bayer, J; Beldjilali, B; Belenguer, T; Belkhalfa, N; Bellotti, R; Belov, A; Belov, K; Belz, JW; Benmessai, K; Bertaina, M; Biermann, PL; Biktemerova, S; Bisconti, F; Blanc, N; Blecki, J; Blin-Bondil, S; Bobik, P; Bogomilov, M; Bozzo, E; Bruno, A; Caballero, KS; Cafagna, F; Campana, D; Capdevielle, JN; Capel, F; Caramete, A; Caramete, L; Carlson, P; Caruso, R; Casolino, M; Cassardo, C; Castellina, A; Catalano, O; Cellino, A; Chikawa, M; Chiritoi, G; Christl, MJ; Connaughton, V; Conti, L; Cordero, G; Cotto, G; Crawford, HJ; Cremonini, R; Csorna, S; Cummings, A; Dagoret-Campagne, S; Donato, C; la Taille, C; Santis, C; Peral, L; Martino, M; Djemil, T; Dutan, I; Ebersoldt, A; Ebisuzaki, T; Engel, R; Eser, J; Fenu, F; Fernandez-Gonzalez, S; Fernandez-Soriano, J; Ferrarese, S; Flamini, M; Fornaro, C; Fouka, M; Franceschi, A; Franchini, S; Fuglesang, C; Fujii, T; Fujimoto, J; Fukushima, M; Galeotti, P; Garcia-Ortega, E; Garipov, G; Gascon, E; Genci, J; Giraudo, G; Alvarado, C; Gorodetzky, P; Greg, R; Guarino, E; Guzman, A; Hachisu, Y; Haiduc, M; Harlov, B; Haungs, A; Carretero, J; Cruz, W; Ikeda, D; Inoue, N; Inoue, S; Isgrò, F; Itow, Y; Jammer, T; Jeong, S; Joven, E; Judd, EG; Jung, A; Jochum, J; Kajino, E; Kajino, T; Kalli, S; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Katahira, K; Kawai, K; Kawasaki, Y; Kedadra, A; Khales, H; Khrenov, BA; Kim, JS; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Krantz, H; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Barbera, A; Lachaud, C; Lahmar, H; Lakhdari, F; Larsson, O; Lee, J; Licandro, J; Campano, L; Maccarone, MC; Mackovjak, S; Mandi, M; Maravilla, D; Marcelli, L; Marcos, JL; Marini, A; Marszal, W; Martens, K; Martin, Y; Martinez, O; Martucci, M; Masciantonio, G; Mase, K; Mustafa, M; Matev, R; Matthews, JN; Mebarki, N; Medina-Tanco, G; Mendoza, MA; Menshikov, A; Merino, A; Meseguer, J; Meyer, SS; Mimouni, J; Miyamoto, H; Mizumoto, Y; Monaco, A; Rios, JADL; Nagataki, S; Naitamor, S; Napolitano, T; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleaniski, P; Osteria, G; Pagliaro, A; Painter, W; Panasyuk, MI; Panico, B; Parizot, E; Park, IH; Pastircak, B; Patzak, T; Paul, T; Perez-Grande, I; Perfetto, F; Peter, T; Picozza, P; Pindado, S; Piotrowski, LW; Piraino, S; Placidi, L; Plebaniak, Z; Pliego, S; Pollini, A; Polonski, Z; Popescu, EM; Prat, P; Prevot, G; Prieto, H; Puehlhofer, G; Putis, M; Rabanal, J; Radu, AA; Reyes, M; Rezazadeh, M; Ricci, M; Frias, MD; Ronga, F; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, G; Sagawa, H; Sahnoune, Z; Saito, A; Sakaki, N; Salazar, H; Balanzar, JC; Sanchez, JL; Santangelo, A; Sanz-Andres, A; Palomino, M; Saprykin, O; Sarazin, F; Sato, M; Schanz, T; Schieler, H; Scotti, V; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shimizu, HM; Shin, HS; Shinozaki, K; Shirahama, T; Sokolsky, P; Spataro, B; Stan, I; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Talai, MC; Tameda, Y; Tenzer, C; Thomas, SB; Thomson, GB; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Traiche, M; Tsenov, R; Tsunesada, Y; Tsuno, K; Tubbs, J; Turriziani, S; Uchihori, Y; Vaduvescu, O; Valdes-Galicia, JF; Vallania, P; Vankova, G; Vigorito, C; Villasenor, L; Vlcek, B; Ballmoos, P; Vrabel, M; Wada, S; Watanabe, J; Watts, J ; Weber, M; Munoz, R; Weindl, A; Wiencke, L; Willie, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, S; Young, R; Zgura, IS; Zotov, MY; Marchi, AZ

ASTROPARTICLE PHYSICS 102 巻頁： 98 - 111 2018年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Astroparticle Physics

EUSO-TA is a ground-based telescope, installed at the Telescope Array (TA) site in Black Rock Mesa, Utah, USA. This is the first detector to successfully use a Fresnel lens based optical system and multi-anode photomultipliers (64 channels per tube, 2304 channels encompassing a 10.6° × 10.6° field of view) for detection of Ultra High Energy Cosmic Rays (UHECR). The telescope is located in front of one of the fluorescence detectors of the TA experiment. Since its installation in 2013, the detector has observed several ultra-high energy cosmic ray events and, in addition, meteors. The limiting magnitude of 5.5 on summed frames (∼ 3 ms) has been established. Measurements of the UV night sky emission in different conditions and moon phases and positions have been completed. The performed observations serve as a proof of concept for the future application of this detector technology.

DOI： 10.1016/j.astropartphys.2018.05.007

A search for possible long range spin dependent interactions of the neutron from exotic vector boson exchange Open Access

Haddock, C; Amadio, J; Anderson, E; Barrón-Palos, L; Crawford, B; Crawford, C; Esposito, D; Fox, W; Francis, I; Fry, J; Gardiner, H; Holley, A; Korsak, K; Lieffers, J; Magers, S; Maldonado-Velázquez, M; Mayorov, D; Nico, JS; Okudaira, T; Paudel, C; Santra, S; Sarsour, M; Shimizu, HM; Snow, WM; Sprow, A; Steffen, K; Swanson, HE; Tovesson, F; Vanderwerp, J; Yergeau, PA

PHYSICS LETTERS B 783 巻頁： 227 - 233 2018年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physics Letters Section B Nuclear Elementary Particle and High Energy Physics

We present a search for possible spin dependent interactions of the neutron with matter through exchange of spin 1 bosons with axial vector couplings as envisioned in possible extensions of the Standard Model. This was sought using a slow neutron polarimeter that passed transversely polarized slow neutrons by unpolarized slabs of material arranged so that interactions would tilt the plane of polarization and develop a component along the neutron momentum. The result for the rotation angle, ϕ<sup>′</sup>=[2.8±4.6(stat.)±4.0(sys.)]×10<sup>−5</sup> rad/m is consistent with zero. This result improves the upper bounds on the neutron-matter coupling g<inf>A</inf> <sup>2</sup> by about three orders of magnitude for force ranges in the mm– μm regime.

DOI： 10.1016/j.physletb.2018.06.066

Nuclear spin dependence of time reversal invariance violating effects in neutron scattering 査読有り Open Access

Gudkov, V; Shimizu, HM

PHYSICAL REVIEW C 97 巻 ( 6 ) 2018年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physical Review C

The spin structure of parity violating and time reversal invariance violating effects in neutron scattering is discussed. The explicit relations between these effects are presented in terms of functions nuclear spins and neutron partial widths of p-wave resonances.

DOI： 10.1103/PhysRevC.97.065502

First observations of speed of light tracks by a fluorescence detector looking down on the atmosphere Open Access

Abdellaoui G., Abe S., Adams J. H. Jr., Ahriche A., Allard D., Allen L., Alonso G., Anchordoqui L., Anzalone A., Arai Y., Asano K., Attallah R., Attoui H., Ave Pernas M., Bacholle S., Bakiri M., Baragatti P., Barrillon P., Bartocci S., Bayer J., Beldjilali B., Belenguer T., Belkhalfa N., Bellotti R., Belov A., Belov K., Benmessai K., Bertainaek M., Biermann P. L., Biktemerova S., Bisconti F., Blanc N., Blecki J., Blin-Bondil S., Bobik P., Bogomilov M., Bozzo E., Bruno A., Caballero K. S., Cafagna F., Campana D., Capdevielle J-N, Capel F., Caramete A., Caramete L., Carlson P., Caruso R., Casolino M., Cassardo C., Castellina A., Catalano C., Catalano O., Cellino A., Chikawa M., Chiritoi G., Christl M. J., Connaughton V, Conti L., Cordero G., Cotto G., Crawford H. J., Cremonini R., Csorna S., Cummings A., Dagoret-Campagne S., De Donato C., de la Taille C., De Santis C., del Peral L., Di Martino M., Damian A. Diaz, Djemil T., Dutan I, Ebersoldt A., Ebisuzaki T., Engel R., Eser J., Fenuek F., Fernandez-Gonzalez S., Fernandez-Soriano J., Ferrarese S., Flamini M., Fornaro C., Fouka M., Franceschi A., Franchini S., Fuglesang C., Fujii T., Fujimoto J., Fukushima M., Galeotti P., Garcia-Ortega E., Garipov G., Gascon E., Genci J., Giraudo G., Gonzalez Alvarado C., Gorodetzky P., Greg R., Guarino F., Guzman A., Hachisu Y., Haiduc M., Harlov B., Haungs A., Hernandez Carretero J., Hidber Cruz W., Ikeda D., Inoue N., Inoue S., Isgro F., Itow Y., Jammer T., Jeong S., Joven E., Judd E. G., Jung A., Jochum J., Kajino F., Kajino T., Kalli S., Kaneko I, Karadzhov Y., Karczmarczyk J., Katahira K., Kawai K., Kawasaki Y., Kedadra A., Khales H., Khrenov B. A., Kim Jeong-Sook, Kim Soon-Wook, Kleifges M., Klimov P. A., Kolev D., Krantz H., Kreykenbohm I, Kudela K., Kurihara Y., Kusenko A., Kuznetsov E., La Barbera A., Lachaud C., Lahmar H., Lakhdari F., Larson R., Larsson O., Lee J., Licandro J., Lopez Campano L., Maccarone M. C., Mackovjak S., Mahdi M., Maravilla D., Marcelli L., Marcos J. L., Marini A., Marszal W., Martens K., Martin Y., Martinez O., Martucci M., Masciantonio G., Mase K., Mastafa M., Matev R., Matthews J. N., Mebarki N., Medina-Tanco G., Mendoza M. A., Menshikov A., Merino A., Meseguer J., Meyer S. S., Mimouni J., Miyamoto H., Mizumoto Y., Monaco A., Morales de los Rios J. A., Moretto C., Nagataki S., Naitamor S., Napolitano T., Naslund W., Nava R., Neronov A., Nomoto K., Nonaka T., Ogawa T., Ogio S., Ohmori H., Olinto A. V, Orleanski P., Osteria G., Pagliaro A., Painter W., Panasyuk M. I, Panico B., Pasqualino G., Parizot E., Park I. H., Pastircak B., Patzak T., Paul T., Perez-Grande I, Perfetto F., Peter T., Picozza P., Pindado S., Piotrowski L. W., Piraino S., Placidi L., Plebaniak Z., Pliego S., Pollini A., Polonski Z., Popescu E. M., Prat P., Prevot G., Prieto H., Puehlhofer G., Putis M., Rabanal J., Radu A. A., Reyes M., Rezazadeh M., Ricci M., Rodriguez Frias M. D., Rodencal M., Ronga F., Roudil G., Rusinov I, Rybczynski M., Sabau M. D., Saez Cano G., Sagawa H., Sahnoune Z., Saito A., Sakaki N., Salazar H., Sanchez Balanzar J. C., Sanchez J. L., Santangelo A., Sanz-Andres A., Sanz Palomino M., Saprykin O., Sarazin F., Sato M., Schanz T., Schieler H., Scotti V, Selmane S., Semikoz D., Serra M., Sharakin S., Shimizu H. M., Shinozaki K., Shirahama T., Spataro B., Stan I, Sugiyama T., Supanitsky D., Suzuki M., Szabelska B., Szabelski J., Tajima N., Tajima T., Takahashi Y., Takami H., Takeda M., Takizawa Y., Talai M. C., Tenzer C., Thomas S. B., Tibolla O., Tkachev L., Tokuno H., Tomida T., Tone N., Toscano S., Traiche M., Tsenov R., Tsunesada Y., Tsuno K., Tubbs J., Turriziani S., Uchihori Y., Vaduvescu O., Valdes-Galicia J. F., Vallania P., Vankova G., Vigorito C., Villasenor L., Vlcek B., Von Ballmoos P., Vrabel M., Wada S., Watanabe J., Watts J. Jr., Weber M., Weigand Munoz R., Weindl A., Wiencke L., Wille M., Wilms J., Wlodarczyk Z., Yamamoto T., Yang J., Yano H., Yashin I. V, Yonetoku D., Yoshida S., Young R., Zgura I. S., Zotov M. Yu, Marchi A. Zuccaro

JOURNAL OF INSTRUMENTATION 13 巻 2018年5月

Angular distribution of γ rays from neutron-induced compound states of <SUP>140</SUP>La Open Access

Okudaira, T; Takada, S; Hirota, K; Kimura, A; Kitaguchi, M; Koga, J; Nagamoto, K; Nakao, T; Okada, A; Sakai, K; Shimizu, HM; Yamamoto, T; Yoshioka, T

PHYSICAL REVIEW C 97 巻 ( 3 ) 2018年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physical Review C

The angular distribution of individual γ rays, emitted from a neutron-induced compound-nuclear state via radiative capture reaction of La139(n,γ) has been studied as a function of incident neutron energy in the epithermal region by using germanium detectors. An asymmetry ALH was defined as (NL-NH)/(NL+NH), where NL and NH are integrals of low- and high-energy region of a neutron resonance respectively, and we found that ALH has the angular dependence of (Acosθγ+B), where θγ is the emitted angle of γ rays, with A=-0.3881±0.0236 and B=-0.0747±0.0105 in 0.74 eV p-wave resonance. This angular distribution was analyzed within the framework of interference between s- and p-wave amplitudes in the entrance channel to the compound-nuclear state, and it is interpreted as the value of the partial p-wave neutron width corresponding to the total angular momentum of the incident neutron combined with the weak matrix element, in the context of the mechanism of enhanced parity-violating effects. Additionally, we use the result to quantify the possible enhancement of the breaking of time-reversal invariance in the vicinity of the p-wave resonance.

DOI： 10.1103/PhysRevC.97.034622

Search for deviations from the inverse square law of gravity at nm range using a pulsed neutron beam 査読有り Open Access

Haddock, CC; Oi, N; Hirota, K; Ino, T; Kitaguchi, M; Matsumoto, S; Mishima, K; Shima, T; Shimizu, HM; Snow, WM; Yoshioka, T

PHYSICAL REVIEW D 97 巻 ( 6 ) 2018年3月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Physical Review D

We describe an experimental search for deviations from the inverse-square law of gravity at the nanometer length scale using neutron scattering from noble gases on a pulsed slow neutron beam line. By measuring the neutron momentum transfer (q) dependence of the differential cross section for xenon and helium and comparing to their well-known analytical forms, we place an upper bound on the strength of a new interaction as a function of interaction length λ which improves upon previous results in the region λ<0.1 nm, and remains competitive in the larger-λ region. A pseudoexperimental simulation is developed for this experiment and its role in the data analysis is described. We conclude with plans for improving sensitivity in the larger-λ region.

DOI： 10.1103/PhysRevD.97.062002

Characterization of germanium detectors for the measurement of the angular distribution of prompt γ-rays at the ANNRI in the MLF of the J-PARC Open Access

Takada, S; Okudaira, T; Goto, F; Hirota, K; Kimura, A; Kitaguchi, M; Koga, J; Nakao, T; Sakai, K; Shimizu, HM; Yamamoto, T; Yoshioka, T

JOURNAL OF INSTRUMENTATION 13 巻 ( 2 ) 2018年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Instrumentation

In this study, the germanium detector assembly, installed at the Accurate Neutron-Nuclear Reaction measurement Instruments (ANNRI) in the Material and Life Science Facility (MLF) operated by the Japan Proton Accelerator Research Complex (J-PARC), has been characterized for extension to the measurement of the angular distribution of individual γ-ray transitions from neutron-induced compound states. We have developed a Monte Carlo simulation code using the GEANT4 toolkit, which can reproduce the pulse-height spectra of γ-rays from radioactive sources and (n,γ) reactions. The simulation is applicable to the measurement of γ-rays in the energy region of 0.5-11.0 MeV.

DOI： 10.1088/1748-0221/13/02/P02018

Angular Distribution of gamma-rays from Neutron-induced Compound States of ¹⁴⁰La 査読有り

T.Okudaira, S.Takada, K.Hirota, A.Kimura, M.Kitaguchi, J.Koga, K.Nagamoto, T.Nakao, A.Okada, K.Sakai, H.M.Shimizu, T.Yamamoto, T.Yoshioka

Physical Review C 頁： 0 2018年

Cosmic ray oriented performance studies for the JEM-EUSO first level trigger Open Access

Abdellaoui, G; Abe, S; Acheli, A; Adams, JH ; Ahmad, S; Ahriche, A; Albert, JN; Allard, D; Alonso, G; Anchordoqui, L; Andreev, V; Anzalone, A; Aouimeur, W; Arai, Y; Arsene, N; Asano, K; Attallah, R; Attoui, H; Pernas, MA; Bacholle, S; Bakiri, M; Baragatti, P; Barrillon, P; Bartocci, S; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, A; Belov, K; Benadda, B; Benmessai, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Bisconti, F; Blanc, N; Blecki, J; Blin-Bondil, S; Bobik, P; Bogomilov, M; Bonamente, M; Boudaoud, R; Bozzo, E; Briggs, MS; Bruno, A; Caballero, KS; Cafagna, F; Campana, D; Capdevielle, JN; Capel, F; Caramete, A; Caramete, L; Carlson, P; Caruso, R; Casolino, M; Cassardo, C; Castellina, A; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Chiritoi, G; Christl, MJ; Connaughton, V; Conti, L; Contino, G; Cordero, G; Cotto, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Di Martino, M; Djemil, T; Djenas, SA; Dulucq, F; Dupieux, M; Dutan, I; Ebersoldt, A; Ebisuzaki, T; Engel, R; Eser, J; Fang, K; Fenu, F; Fernández-González, S; Fernández-Soriano, J; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Forza, R; Fouka, M; Franceschi, A; Franchini, S; Fuglesang, C; Fujimoto, J; Fukushima, M; Galeotti, P; García-Ortega, E; Garipov, G; Gascón, E; Geary, J; Gelmini, G; Genci, J; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guardone, N; Guarino, F; Guehaz, R; Guzmán, A; Hachisu, Y; Haiduc, M; Harlov, B; Haungs, A; Carretero, JH; Hidber, W; Higashide, K; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itow, Y; Jammer, T; Joven, E; Judd, EG; Jung, A; Jochum, J; Kajino, F; Kajino, T; Kalli, S; Kaneko, I; Kang, D; Kanouni, F; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Kedadra, A; Khales, H; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lahmar, H; Lakhdari, F; Larsson, O; Lee, J; Licandro, J; Lim, H; Campano, LL; Maccarone, MC; Mackovjak, S; Mahdi, M; Manfrin, M; Maravilla, D; Marcelli, L; Marcos, JL; Marini, A; Martens, K; Martín, Y; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Matthews, JN; Mebarki, N; Medina-Tanco, G; Mehrad, L; Mendoza, MA; Merino, A; Mernik, T; Meseguer, J; Messaoud, S; Micu, O; Mignone, M; Mimouni, J; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Ríos, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nadji, B; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Painter, W; Panasyuk, MI; Panico, B; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Pérez-Grande, I; Perfetto, F; Peter, T; Picozza, P; Pierog, T; Pindado, S; Piotrowski, LW; Piraino, S; Placidi, L; Plebaniak, Z; Pliego, S; Pollini, A; Popescu, EM; Prat, P; Prévôt, G; Prieto, H; Putis, M; Rabanal, J; Radu, AA; Rahmani, M; Reardon, P; Reyes, M; Rezazadeh, M; Ricci, M; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Sahnoune, Z; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sanchez, JC; Sánchez, JL; Santangelo, A; Crúz, LS; Sanz-Andrés, A; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; Sledd, J; Slominska, K; Sobey, A; Stan, I; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tahi, H; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Talai, MC; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Traïche, M; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Vankova, G; Vigorito, C; Villaseñor, L; Vlcek, B; von Ballmoos, P; Vrabel, M; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Muñoz, RW; Weindl, A; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, S; Young, R; Zgura, IS; Zotov, MY; Marchi, AZ

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 866 巻頁： 150 - 163 2017年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

JEM-EUSO is a space mission designed to investigate Ultra-High Energy Cosmic Rays and Neutrinos (E>5⋅10<sup>19</sup>eV) from the International Space Station (ISS). Looking down from above its wide angle telescope is able to observe their air showers and collect such data from a very wide area. Highly specific trigger algorithms are needed to drastically reduce the data load in the presence of both atmospheric and human activity related background light, yet retain the rare cosmic ray events recorded in the telescope. We report the performance in offline testing of the first level trigger algorithm on data from JEM-EUSO prototypes and laboratory measurements observing different light sources: data taken during a high altitude balloon flight over Canada, laser pulses observed from the ground traversing the real atmosphere, and model landscapes reproducing realistic aspect ratios and light conditions as would be seen from the ISS itself. The first level trigger logic successfully kept the trigger rate within the permissible bounds when challenged with artificially produced as well as naturally encountered night sky background fluctuations and while retaining events with general air-shower characteristics.

DOI： 10.1016/j.nima.2017.05.043

Meteor studies in the framework of the JEM-EUSO program Open Access

Abdellaoui, G; Abe, S; Acheli, A; Adams, JHJH; Ahmad, S; Ahriche, A; Albert, JN; Allard, D; Alonso, G; Anchordoqui, L; Andreev, V; Anzalone, A; Aouimeure, W; Arai, Y; Arsene, N; Asano, K; Attallah, R; Attoui, H; Pemas, MA; Bacholle, S; Bakiri, M; Baragatti, P; Barrillon, P; Bartocci, S; Batsch, T; Bayer, J; Bechini, R; Belenguer, T; Bellotti, R; Belov, A; Belov, K; Benadda, B; Benmessai, K; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Bisconti, F; Blanc, N; Blecki, J; Blin-Bondil, S; Bobik, P; Bogomilov, M; Bonamente, M; Boudaoud, R; Bozzo, E; Briggs, MS; Bruno, A; Caballero, KS; Cafagna, F; Campana, D; Capdevielle, JN; Capel, F; Caramete, A; Caramete, L; Carlson, P; Caruso, R; Casolino, M; Cassardo, C; Castellina, A; Castellini, G; Catalano, C; Catalano, O; Cellino, A; Chikawa, M; Chiritoi, G; Christl, MJ; Connaughton, V; Conti, L; Cordero, G; Crawford, HJ; Cremonini, R; Csorna, S; Dagoret-Campagne, S; De Donato, C; de la Taille, C; De Santis, C; del Peral, L; Di Martino, M; Djemil, T; Djenas, SA; Dulucq, F; Dupieux, M; Dutan, I; Ebersoldt, A; Ebisuzaki, T; Engel, R; Eser, J; Fang, K; Fenu, F; Fernandez-Gonzalez, S; Fernandez-Soriano, J; Ferrarese, S; Finco, D; Flamini, M; Fornaro, C; Fouka, M; Franceschi, A; Franchini, S; Fuglesang, C; Fujimoto, J; Fukushima, M; Galeotti, P; García-Ortega, E; Garipov, G; Gascón, E; Geary, J; Gelmini, G; Genci, J; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guehaz, R; Guzmán, A; Hachisu, Y; Haiduc, M; Harlov, B; Haungs, A; Carretero, JH; Hidber, W; Higashide, K; Ikeda, D; Ikeda, H; Inoue, N; Inoue, S; Isgrò, F; Itow, Y; Jammer, T; Joven, E; Judd, EG; Jung, A; Jochum, J; Kajino, F; Kajino, T; Kalli, S; Kaneko, I; Kang, D; Kanouni, F; Karadzhov, Y; Karczmarczyk, J; Karus, M; Katahira, K; Kawai, K; Kawasaki, Y; Kedadra, A; Khales, H; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kusenko, A; Kuznetsov, E; Lacombe, M; Lachaud, C; Lahmar, H; Lakhdari, F; Larsson, O; Lee, J; Licandro, J; Lim, H; Campano, LL; Maccarone, MC; Mackovjak, S; Mandi, M; Maravilla, D; Marcelli, L; Marcos, JL; Marini, A; Martens, K; Martín, Y; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Matthews, JN; Mebarki, N; Medina-Tanco, G; Mehrad, L; Mendoza, MA; Merino, A; Memik, T; Meseguer, J; Messaoud, S; Micu, O; Mimouni, J; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monaco, A; Monnier-Ragaigne, D; de los Rios, JAM; Moretto, C; Morozenko, VS; Mot, B; Murakami, T; Nadji, B; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Napolitano, T; Nardellis, A; Naumov, D; Nava, R; Neronov, A; Nomoto, K; Nonaka, T; Ogawa, T; Ogio, S; Ohmori, H; Olinto, AV; Orleariski, P; Osteria, G; Painter, W; Panasyuk, MI; Panico, B; Parizot, E; Park, IH; Park, HW; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Perdichizzi, M; Perez-Grande, I; Perfetto, F; Peter, T; Picozza, P; Pierog, T; Pindado, S; Piotrowski, LW; Pirainou, S; Placidis, L; Plebaniak, Z; Pliego, S; Pollini, A; Popescu, EM; Prat, P; Prévôt, G; Prieto, H; Putis, M; Rabanal, J; Radu, AA; Rahmani, M; Reardon, P; Reyes, M; Rezazadeh, M; Ricci, M; Frías, MDR; Ronga, F; Roth, M; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Sagawa, H; Sahnoune, Z; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sanchez, JC; Sanchez, JL; Santangelo, A; Crúz, LS; Sanz-Andrés, A; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozieblo, G; Sledd, J; Slomiriska, K; Sobey, A; Stan, I; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tahi, H; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Talai, MC; Tenzer, C; Tibolla, O; Tkachev, L; Tokuno, H; Tomida, T; Tone, N; Toscano, S; Traïche, M; Tsenov, R; Tsunesada, Y; Tsuno, K; Tymieniecka, T; Uchihori, Y; Unger, M; Vaduvescu, O; Valdes-Galicia, JF; Vallania, P; Vankova, G; Vigorito, C; Villaseñor, L; Vicek, B; von Ballmoos, P; Vrabel, M; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Muñoz, RW; Weindl, A; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, S; Young, R; Zgura, IS; Zotov, MY; Marchi, AZ

PLANETARY AND SPACE SCIENCE 143 巻頁： 245 - 255 2017年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Planetary and Space Science

We summarize the state of the art of a program of UV observations from space of meteor phenomena, a secondary objective of the JEM-EUSO international collaboration. Our preliminary analysis indicates that JEM-EUSO, taking advantage of its large FOV and good sensitivity, should be able to detect meteors down to absolute magnitude close to 7. This means that JEM-EUSO should be able to record a statistically significant flux of meteors, including both sporadic ones, and events produced by different meteor streams. Being unaffected by adverse weather conditions, JEM-EUSO can also be a very important facility for the detection of bright meteors and fireballs, as these events can be detected even in conditions of very high sky background. In the case of bright events, moreover, exhibiting some persistence of the meteor train, preliminary simulations show that it should be possible to exploit the motion of the ISS itself and derive at least a rough 3D reconstruction of the meteor trajectory. Moreover, the observing strategy developed to detect meteors may also be applied to the detection of nuclearites, exotic particles whose existence has been suggested by some theoretical investigations. Nuclearites are expected to move at higher velocities than meteoroids, and to exhibit a wider range of possible trajectories, including particles moving upward after crossing the Earth. Some pilot studies, including the approved Mini-EUSO mission, a precursor of JEM-EUSO, are currently operational or in preparation. We are doing simulations to assess the performance of Mini-EUSO for meteor studies, while a few meteor events have been already detected using the ground-based facility EUSO-TA.

DOI： 10.1016/j.pss.2016.12.001

Pseudomagnetic effects for resonance neutrons 査読有り Open Access

Vladimir Gudkov, Hirohiko M. Shimizu

Physical Review C 95 巻頁： 045501 2017年4月

A neutron detector with submicron spatial resolution using fine-grained nuclear emulsion Open Access

Naganawa N., Awano S., Hino M., Hirose M., Hirota K., Kawahara H., Kitaguchi M., Mishima K., Nagae T., Shimizu H. M., Tasaki S., Umemoto A.

NEUTRON IMAGING FOR APPLICATIONS IN INDUSTRY AND SCIENCE 88 巻頁： 224 - 230 2017年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physics Procedia

We developed a neutron detector with submicron spatial resolution by incorporating 6Li into a fine-grained nuclear emulsion. Upon exposure to thermal neutrons, tracks from neutron capture events were observed. The detector spatial resolution was estimated from their grain density. Detection efficiency was measured using the detector response to cold neutrons.

DOI： 10.1016/j.phpro.2017.06.031

Erythrokeratoderma Variabilis Caused by p.Gly45Glu in Connexin 31: Importance of the First Extracellular Loop Glycine Residue for Gap Junction Function Open Access

Takeichi Takuya, Sugiura Kazumitsu, Hsu Chao-Kai, Nomura Toshifumi, Takama Hiroyuki, Simpson Michael A., Shimizu Hiroshi, McGrath John A., Akiyama Masashi

ACTA DERMATO-VENEREOLOGICA 96 巻 ( 4 ) 頁： 557 - 559 2016年

Pulsed neutron-beam focusing by modulating a permanent-magnet sextupole lens 査読有り Open Access

Yamada, M; Iwashita, Y; Ichikawa, M; Fuwa, Y; Tongu, H; Shimizu, HM; Mishima, K; Yamada, NL; Hirota, K; Otake, Y; Seki, Y; Yamagata, Y; Hino, M; Kitaguchi, M; Garbe, U; Kennedy, SJ; Lee, WT; Andersen, KH; Guerard, B; Manzin, G; Geltenbort, P

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS 2015 巻 ( 4 ) 2015年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Progress of Theoretical and Experimental Physics

We have developed a compact permanent-magnet sextupole lens for neutrons that can focus a pulsed beam with a wide wavelength range-the maximum wavelength being more than double the minimum-while sufficiently suppressing the effect of chromatic aberration. The bore diameter is ø15 mm. Three units of a double-ring sextupole with a length of 66mm are cascaded, resulting in a total length of 198 mm. The dynamic modulation range of the unit-averaged field gradient is 1.06 × 10<sup>4</sup>-5.86 × 10<sup>4</sup> Tm<sup>-2</sup>. Permanent magnets and newly developed torquecanceling elements make the device compact, its production costs low, and its operation simpler than that of other magnetic lenses. The efficacy of this lens was verified using very cold neutrons. The diameter of the focused beam spots over the wavelength range of 27-55 Å was the same as that of the source aperture (2mm diameter) when the magnification of the optical arrangement was unity. The total beam flux over this wavelength range was enhanced by a factor of 43. The focusing distance from the source to the detector was 1.84m. In addition, in a demonstration of neutron image magnification, the image of a sample mask magnified by a factor of 4.1 was observed when the magnification of the optical arrangement was 5.0.

DOI： 10.1093/ptep/ptv015

Concepts of Neutron Polarization Analysis Devices for a New Neutron Chopper Spectrometer POLANO, in J-PARC 査読有り

K.Ohoyama, T.Yokoo, S.Itoh, T.Ino, M.Ohkawa, T.Oku, S.Tasaki, K.Iwasa, T.J.Sato, S.Ishimoto, K.Taketani, H.Kira, Y.Sakaguchi, M.Nanbu, H.Hiraka, H.M.Shimizu, M.Takeda, M.Hino, K.Hayashi, U.Fliges, P.Hautle

Journal of Physics Conf. Ser. 502 巻頁： 012051 2014年

Development of a New Neutron Mirror made of Deuterated Diamond-like Carbon 査読有り

D.Sakurai, J.Chiba, T.Ino, K.Kakusho, N.Kaneko, R.Katayama, M.Kitaguchi, K.Mishima, S.Muto, K.Ozeki, H.M.Shimizu, S.Yamashita, T.Yoshioka, D.Nishimura

Journal of Physics Conf. See. 502 巻頁： 012010 2014年

Production of Ultra Cold Neutrons by a Doppler Shifter with Pulsed Neutrons at J-PARC 査読有り Open Access

K.Mishima, S.Imajo, M.Hino, T.Ino, Y.Iwashita, R.Katayama, M.Kitaguchi, T.Oda, H.M.Shimizu, M.Utsuro, S.Yamashita, T.Yoshioka

Journal of Physics Conf. Ser. 502 巻頁： 012030 2014年

Neutron-Antineutron Oscillation: A Snowmass 2013 White Paper

K.Babu, S.Banerjee, D.V.Baxter, Z.Berezhiani, M.Bergevin, S.Bhattacharya, S.Brice, T.W.Burgess, L.Castellanos, S.Chattopadhyay, M-C.Chen, C.E.Coppola, R.Cowsik, J.A.Crabtree, P.Das, E.B.Dees, A.Dolgov, G.Dvali, P.Ferguson, M.Frost, T.Gabriel, A.Gal, F.Gallmeier, K.Ganezer, E.Golubeva, V.B.Graves, G.Greene, T.Handler, B.Hartfiel, A.Hawari, L.Heilbronn, C.Johnson, Y.Kamyshkov, B.Kerbikov, M.Kitaguchi, B.Z.Kopeliovich, V.B.Kopeliovich, W.Korsch, V.Kuzmin, C-Y.Liu, P.McGaughey, M.Mocko, R.Mohapatra, N.Mokhov, G.Muhrer, P.Mumm, L.Okun, R.W.Pattie Jr., D.G.Phillips II, C.Quigg, E.Ramberg, A.Ray, A.Roy, A.Ruggles, U.Sarkar, A.Saunders, A P.Serebrov, H.M.Shimizu, R.Shrock, A.K.Sikdar, S.Sjue, W.M.Snow, A.Soha, S.Spanier, S.Striganov, L.Townsend, R.Tschirhart, A.Vainshtein, R.Van Kooten, Z.Wang, B.Wehring and A.R.Young

arXiv:1310.8593v1 頁： 1-26 2013年10月

An Evaluation of the Exposure in Nadir Observation of the JEM-EUSO Mission 査読有り

J.H.Adams Jr., S.Ahmad, J.-N.Albert, D.Allard, M.Ambrosio, L.Anchordoqui, A.Anzalone, Y.Arai, C.Aramo, K.Asano, M.Ave, P.Barrillon, T.Batsch, J.Bayer, T.Belenguer, R.Bellotti, A.A.Berlind, M.Bertain, P.L.Biermann, S.Biktemerova, C.Blaksley, J.B l¸ecki, S.Blin-Bondilb, J.Blumer, P.Bobik, M.Bogomilov, M.Bonamente, M.S.Briggs, S.Briz, A.Bruno, F.Cafagna, D.Campana, J.-N.Capdevielle, R.Caruso, M.Casolino, C.Cassardo, G.Castellini, O.Catalano, A.Cellino, M.Chikawa, M.J.Christl, V.Connaughton, J.F.Cortes, H.J.Crawford, R.Cremonini, S.Csorna, J.C.D'Olivo, S.Dagoret-Campagne, A.J.de Castro, C.De Donato, C.de la Taille, L.del Peral, A.Dell'Oro, M.P.De Pascale, M.Di Martino, G.Distratis, M.Dupieux, A.Ebersoldt, T.Ebisuzaki, R.Engel, S.Falk, K.Fang, F.Fenu, I.Fernandez-Gomez, S.Ferrarese, A.Franceschi, J.Fujimoto, P.Galeotti, G.Garipov, J.Geary, U.G.Giaccari, G.Giraudo, M.Gonchar, C.Gonz´alez Alvarado, P.Gorodetzky, F.Guarino, A.Guzm´an, Y.Hachisu, B.Harlov, A.Haungs, J.Hernandez Carretero, K.Higashide, T.Iguchi, H.Ikeda, N.Inoue, S.Inoue, A.Insoli, F.Isgro, Y.Itow, E.Joven, E.G.Judd, A.Jung, F.Kajino, T.Kajino, I.Kaneko, Y.Karadzhov, J.Karczmarczyk, K.Katahira, K.Kawai, Y.Kawasaki, B.Keilhauer, B.A.Khrenov, Jeong-Sook Kim, Soon-Wook Kim, Sug-Whan Kim, M.Kleifges, P.A.Klimov, S.H.Ko, D.Kolev, I.Kreykenbohm, K.Kudela, Y.Kurihara, E.Kuznetsov, G.La Rosa, J.Lee, J.Licandro, H.Lim, F.Lopez, M.C.Maccarone, K.Mannheim, L.Marcelli, A.Marini, G.Martin-Chassard, O.Martinez, G.Masciantonio, K.Mase, R.Matev, A.Maurissen, G.Medina-Tanco, T.Mernik, H.Miyamoto, Y.Miyazaki, Y.Mizumoto, G.Modestino, D.Monnier-Ragaigne, J.A.Morales de los Rios, B.Mot, T.Murakami, M.Nagano, M.Nagata, S.Nagataki, T.Nakamura, J.W.Nam, S.Nam, K.Nam, T.Napolitano, D.Naumov, A.Neronov, K.Nomoto, T.Ogawa, H.Ohmori, A.V.Olinto, P.Orleanski, G.Osteria, N.Pacheco, M.I.Panasyuk, E.Parizot, I.H.Park, B.Pastircak, T.Patzak, T.Paul, C.Pennypacker, T.Peter, P.Picozza, A.Pollini, H.Prieto, P.Reardon, M.Reina, M.Reyes, M.Ricci, I.Rodriguez, M.D.Rodriguez Frias, F.Ronga, H.Rothkaehl, G.Roudil, I.Rusinov, M.Rybczynski, M.D.Sabau, G.Saez Cano, A.Saito, N.Sakaki, M.Sakata, H.Salazar, S.Sanchez, A.Santangelo, L.Santiago Cruz, M.Sanz Palomino, O.Saprykin, F.Sarazin, H.Sato, M.Sato, T.Schanz, H.Schieler, V.Scotti, M.Scuderi, A.Segreto, S.Selmane, D.Semikoz, M.Serra, S.Sharakin, T.Shibata, H.M.Shimizu, K.Shinozaki, T.Shirahama, G.Siemieniec-Ozieblo, H.H.Silva Lopez, J.Sledd, K.S lominska, A.Sobey, T.Sugiyama, D.Supanitsky, M.Suzuki, B.Szabelska, J.Szabelski, F.Tajima, N.Tajima, T.Tajima, Y.Takahashi, H.Takami, M.Takeda, Y.Takizawa, C.Tenzer, O.Tibolla, L.Tkachev, T.Tomida, N.Tone, F.Trillaud, R.Tsenov, K.Tsuno, T.Tymieniecka, Y.Uchihori, O.Vaduvescu, J.F.Valdes-Galicia, P.Vallani, L.Valore, G.Vankova, C.Vigorito, L.Villasenor, P.von Ballmoos, S.Wada, J.Watanabe, S.Watanabe, J.Watts Jr., M.Weber, T.J.Weiler, T.Wibig, L.Wiencke, M.Wille, J.Wilms, Z.W lodarczyk, T.Yamamoto, Y.Yamamoto, J.Yang, H.Yano, I.V.Yashin, D.Yonetoku, K.Yoshida, S.Yoshida, R.Young, A.Zamora, A.Zuccaro Marchi

Astroparticle Physics 44 巻頁： 76-90 2013年

Basic Concepts of Polarization Analysis for Neutron Chopper Spectrometer POLANO at J-PARC 査読有り

K.Ohoyama, T.Yokoo, S.Itoh, J.Suzuki, K.Iwasa, T.J.Sato, H.Kira, Y.Sakaguchi, T.Ino, T.Oku, K.Tomiyasu, M.Matsuura, H.Hiraka, M.Fujita, H.Kimura, T.Sato, J.Suzuki, H.M.Shimizu, T.Arima, M.Takeda, K.Kaneko, M.Hino, S.Muto, H.Nojiri, C.H.Lee, J.G.Park and S.Choi

J. Phys. Soc. Jpn. 82 巻頁： SA036 2013年

Magnetic Shield Design of In-situ SEOP Polarized 3He Neutron Spin Filter System 査読有り Open Access

H.Kira, Y.Sakaguchi, J.Suzuki, T.Oku, M.Nakamura, M.Arai, K.Kakurai, Y.Endo, Y.Arimoto, T.Ino, H.M.Shimizu, T.Kamiyama, K.Ohoyama, H.Hiraka, K.Tsutsumi, K.Yamada and L.-J.Chang

Physics Procedia 42 巻頁： 200-205 2013年

Rebunching Ultracold Neutrons by Magnetic Deceleration for the Neutron EDM Experiment at J-PARC

S.Imajo, Y.Iwashita, P.Geltenbort, Y.Arimoto, H.M.Shimizu, M.Kitaguchi, T.Yoshioka, Y.Seki

Proc. 4th International Particle Accelerator Conference (IPAC2013), Shanghai, China 12-17 May, 2013 頁： 1187 2013年

Development of Longitudinal-Gradient Magnet for Time Focusing of Ultra-Cold Neutron With Anisotropic Inter-Pole

Arimoto, Y; Iwashita, Y; Yoshioka, T; Kitaguchi, M; Imajo, S; Shimizu, HM; Asahi, K; Ino, T; Kamiya, Y; Mishima, K; Muto, S; Sakai, K; Shima, T; Taketani, K; Yamashita, S; Yoshimi, A

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 22 巻 ( 3 ) 頁： 6156745 2012年6月

記述言語：英語出版者・発行元：IEEE Transactions on Applied Superconductivity

Ultra-cold neutron (UCN) is attractive for a search of the neutron electric dipole moment (nEDM). It is crucial to store UCNs with high density in a bottle for nEDM measurement apparatus. To increase the density, time focusing technique can be useful, where slow neutrons are accelerated and fast neutrons are decelerated by using magnetic potential. This device is called rebuncher. The rebuncher consists of a gradient magnet, RF coil, and neutron guide. The magnet generates a field gradient of 3.5 T/m (from 1 T to 0.2 T within 24 cm) in the longitudinal direction. By using anisotropic inter-poles, the magnet is compact and keeps the gradient uniform. The fabricated magnet showed good performance as designed. © 2012 IEEE.

DOI： 10.1109/TASC.2012.2183569

Present status of neutron fundamental physics at J-PARC 招待有り査読有り Open Access

Arimoto, Y; Funahashi, H; Higashi, N; Hino, M; Hirota, K; Imajo, S; Ino, T; Iwashita, Y; Katayama, R; Kitaguchi, M; Mishima, K; Muto, S; Oide, H; Otono, H; Seki, Y; Shima, T; Shimizu, HM; Taketani, K; Yamada, T; Yamashita, S; Yoshioka, T

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS 2012 巻 ( 1 ) 頁： 02B007 2012年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Progress of Theoretical and Experimental Physics

A neutron beamline for the study of fundamental physics has been constructed at the spallation neutron source of the Japan Proton Accelerator Research Complex (J-PARC). In-flight measurement of the neutron lifetime and the development of the transport optics of ultracold neutrons are in progress. The present status of the beamline and these experiments is reported.

DOI： 10.1093/ptep/pts075

Rebunching Low Energy Neutrons by Magnetic Acceleration and Deceleration

Y.Iwashita, S.Imajo, M.Kitaguchi, Y.Arimoto, Hirohiko M. Shimizu, T.Yoshioka, Y.Seki, P.Geltenbort

Proc. 3rd International Particle Accelerator Conference (IPAC2012), New Orleans, USA, 20-25 May, 2012 頁： 2766-2768 2012年

Demonstration of Focusing by a Neutron Accelerator 査読有り

Y.Arimoto, P.Geltenbort, S.Imajo, Y.Iwashita, M.Kitaguchi, Y.Seki, H.M.Shimizu, T.Yoshioka

Phys. Rev. A 86 巻頁： 023843, 1-4 2012年

A Compact SEOP 3He Neutron Spin Filter with AFP-NMR 査読有り

T.Ino, Y.Arimoto, H.M.Shimizu, Y.Sakaguchi, K.Sakai, H.Kira, T.Shinohara, T.Oku, J.-I.Suzuki, K.Kakurai, L.-J.Chang

Journal of Physics Conf. Ser. 340 巻頁： 042006 2012年

Development of Polarized Xe Gas Target for Neutron Experiment 査読有り

K.Sakai, T.Oku, T.Shinohara, H.Kira, M.Ooi, F.Maekawa, K.Kakurai, T.Ino, Y.Arimoto, H.M.Shimizu, Y.Sakaguchi, J.Suzuki, K.Ohoyama and L.J.Chang

Journal of Physics Conf. Ser. 340 巻頁： 012037 2012年

Demonstration of Optical Thickness Measurement Using Multilayer Cold Neutron Interferometer 査読有り

Y.Seki, J.Uda, H.Funahashi, M.Kitaguchi, M.Hino, Y.Otake, K.Taketani and H.M.Shimizu

Journal of Physics Conf. Ser. 340 巻頁： 012039 2012年

Development of Longitudinal-gradient Magnet for Time Focusing of Ultracold Neutron with Anisotropic Interpole 査読有り

Y.Arimoto, Y.Iwashita, T.Yoshioka, M.Kitaguchi, S.Imajo, H.M.Shimizu, K.Asahi, T.Ino, Y.Kamiya, K.Mishima, S.Muto, K.Sakai, T.Shima, K.Taketani, S.Yamashita and A.Yoshimi

IEEE Trans. Appl. Supercond. 22 巻頁： 6156745 2012年

Variable Permanent Magnet Multipoles 査読有り

Y.Iwashita, M.Yamada, S.Ushijima, Y.Fuwa, Y.Nasu, H.Tongu, M.Masuzawa, H.M.Shimizu

IEEE Trans. Appl. Supercond. 22 巻頁： 4000905 2012年

A compact SEOP He-3 neutron spin filter with AFP NMR 査読有り Open Access

Ino Takashi, Arimoto Yasushi, Shimizu Hirohiko M., Sakaguchi Yoshifumi, Sakai Kenji, Kira Hiroshi, Shinohara Takenao, Oku Takayuki, Suzuki Jun-ichi, Kakurai Kazuhisa, Chang Lieh-Jeng

5TH EUROPEAN CONFERENCE ON NEUTRON SCATTERING 340 巻 2012年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：Journal of Physics: Conference Series

We developed AFP NMR in an aluminum container for polarized noble gas nuclei. The radio frequency magnetic field inside the aluminum container was designed from computer simulations. The polarization loss by the AFP spin flip of 3He was measured to be as low as 3.8x10-4. With this technique, a compact in-situ polarizing 3He neutron spin filter with AFP NMR is demonstrated.

DOI： 10.1088/1742-6596/340/1/012006

Recovery of reduced fringe visibility due to finite crossing angle between two paths of a neutron interferometer 査読有り

Kaoru Taketani, Masahiro Hino, Hirohiko M. Shimizu

PHYSICA B-CONDENSED MATTER 406 巻 ( 12 ) 頁： 2377 - 2380 2011年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

In the present study the restoration of interference fringes, whose visibility is degraded by the presence of a finite crossing angle between the two paths of a neutron interferometer, is experimentally demonstrated. A crossing angle of 1.0 mu rad was introduced using an optical component consisting of a magnetic multilayer mirror, a wedge-shaped gap layer, and a nonmagnetic multilayer mirror. To restore the interference fringes, magnetic gradients of 0.64 G/cm were applied using two electro-quadrupole magnets. (C) 2010 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2010.11.090

A compact TOF-SANS using focusing lens and very cold neutrons 査読有り

Yamada, M; Iwashita, Y; Kanaya, T; Yamada, NL; Shimizu, HM; Mishima, K; Hino, M; Kitaguchi, M; Hirota, K; Geltenbort, P; Guerard, B; Manzin, G; Anderson, K; Lal, J; Carpenter, JM; Bleuel, M; Kennedy, SJ

PHYSICA B-CONDENSED MATTER 406 巻 ( 12 ) 頁： 2453 - 2457 2011年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physica B Condensed Matter

We are developing a high-resolution small angle neutron scattering instrument for very cold neutrons (VCN). Our concept includes a magnetic lens for focusing of the beam at the detector plane. The lens consists of one permanent-magnet sextupole array rotating outside another stationary sextupole array, to focus a pulsed white beam of neutrons. Thus the instrument operates in time of flight mode. The prototype magnetic lens has a bore of 15 mm diameter and length of 66 mm, producing a magnetic field gradient oscillating from 1.5×10<sup>4</sup> to 5.9×10<sup>4</sup> T/m<sup>2</sup>, with frequency ≤25 Hz. A torque-canceling magnet around the lens suppresses the torque of rotation from the outer array to 1/3. We have demonstrated the performance of the lens, over wavelength range from 30 to 48 Å, on the PF2-VCN beam line at the Institut Laue-Langevin, France. The focused beam image was the same size as the source, without chromatic aberration, with focal length of 1.14 m. We also studied the performance of this configuration for high-resolution SANS, in a compact geometry (just 5 m long). The measurable q range of this system was 0.009 Å<sup>-1</sup>≤q≤0.3 Å<sup>-1</sup> or 0.004 Å<sup>-1</sup>≤q≤0.08 Å<sup>-1</sup> for sample to detector distances of 100 and 465 mm, respectively. Here, we present the results of our lens characterization study along with the SANS results on a tri-block copolymer (F127 Pluronic) and on a stretched polymer blend (with the Shish-Kebab structure). © 2010 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2010.12.002

Polarization of very cold neutron using a permanent magnet quadrupole 査読有り Open Access

Yoshioka, T; Mishima, K; Ino, T; Taketani, K; Muto, S; Morishima, T; Shimizu, HM; Oku, T; Suzuki, J; Shinohara, T; Sakai, K; Sato, H; Hirota, K; Otake, Y; Kitaguchi, M; Hino, M; Seki, Y; Iwashita, Y; Yamada, M; Ichikawa, M; Sugimoto, T; Kawasaki, S; Komamiya, S; Otono, H; Kamiya, Y; Yamashita, S; Geltenbort, P

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 634 巻 ( 1 SUPPL. ) 頁： S17 - S20 2011年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

For the future fundamental physics experiments by using cold neutrons, we are developing a device which can measure the neutron polarization degree by accuracy significantly below 10<sup>-3</sup>. A quadrupole magnet is one of the promising candidate to measure the neutron polarization degree by such extremely high precision. We have performed a polarization experiment by using the quadrupole magnets at the Very Cold Neutron (VCN) port of the PF-2 in the Institute Laue-Langevin (ILL). As a result, we obtained the polarization degree P with very high accuracy P=0.9994±0.0001(stat.)±0.0003(syst.), which meet our requirement significantly. © 2010 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2010.05.029

Development of thin film neutron focusing lenses 査読有り

Ino, T; Shinohara, T; Adachi, T; Hirota, K; Hino, M; Oku, T; Taketani, K; Mishima, K; Yoshioka, T; Arimoto, Y; Muto, S; Suzuki, J; Shimizu, HM

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 634 巻 ( 1 SUPPL. ) 頁： S94 - S96 2011年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

We have developed thin film Fresnel lenses made of a hydrogen-free amorphous polymer for neutron focusing purposes. A neutron beam test showed the strong focusing of a cold neutron beam, and an increase of the neutron intensity was observed to be more than 50 times. © 2010 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2010.05.046

Parametric resonance enhancement in neutron interferometry and application for the search for non-Newtonian gravity 査読有り Open Access

Gudkov V., Shimizu H., Greene G.

Physical Review C Nuclear Physics 83 巻 ( 2 ) 2011年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physical Review C Nuclear Physics

The parametric resonance enhancement of the phase of neutrons due to non-Newtonian anomalous gravitation is considered. The existence of such resonances is confirmed by numerical calculations. A possible experimental scheme for observing this effect is discussed based on an existing neutron interferometer design. © 2011 American Physical Society.

DOI： 10.1103/PhysRevC.83.025501

A Transport Optics for Pulsed Ultracold Neutrons 査読有り

H.M.Shimizu, Y.Iwashita, M.Kitaguchi, K.Mishima and T.Yoshioka

Nucl. Instrum. Methods A 634 巻頁： 25-27 2011年

Multilayer Neutron Interferometer with Complete Path Separation 査読有り Open Access

Seki, Y; Funahashi, H; Kitaguchi, M; Hino, M; Otake, Y; Taketani, K; Shimizu, HM

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 79 巻 ( 12 ) 2010年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of the Physical Society of Japan

We have developed a new multilayer cold-neutron interferometer using a pair of beam splitting etalons (BSEs) with an air gap of 189 μm in spacing. This is the first multilayer neutron interferometer that separates two paths from each other completely without an overlap. Clear interference fringes with a contrast of 67% have been observed using a monochromatic cold-neutron beam with a wavelength of 0.88 nm. © 2010 The Physical Society of Japan.

DOI： 10.1143/JPSJ.79.124201

Development of a triplet magnetic lens system to focus a pulsed neutron beam 査読有り Open Access

Oku Takayuki, Kira Hiroshi, Shinohara Takenao, Takata Shin-ichi, Arai Masatoshi, Suzuki Jun-ichi, Shimizu Hirohiko M.

INTERNATIONAL CONFERENCE ON NEUTRON SCATTERING 2009 251 巻 ( 1 ) 2010年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：Journal of Physics: Conference Series

A triplet magnetic lens system composed of three sextupole-magnets and two spin flippers was constructed to focus pulsed neutrons in a wide wavelength range with same focal lengths. In this study, we performed a pulsed neutron beam focusing experiment with the system. The design of the system and the experimental results are shown and discussed. © 2010 IOP Publishing Ltd.

DOI： 10.1088/1742-6596/251/1/012078

Neutron Reflectometry for Observation of Machined Surface Roughness 査読有り

Inoue, K; Hirayama, T; Uno, T; Ebisawa, T; Ikeda, K; Honda, H; Shimizu, H

JAPANESE JOURNAL OF APPLIED PHYSICS 48 巻 ( 12 ) 2009年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Japanese Journal of Applied Physics

Neutron reflectometry was applied for the characterization of machined roughness on iron surfaces, including a buried solid-solid contacting surface. The observed distribution of the reflected neutron beam could be explained using a structure factor estimated from the Fourier transform of the physical roughness measured by a contact-type roughness gauge, particularly in the case of a periodic surface structure. In the case of random roughness, the accumulation of beams specularly reflected from every small local region of the surface gave a better explanation of the broad distribution of the scattered beam, where each local region was assumed to be flat and differently inclined relative to the incident beam direction. When the surface was buried beneath another material, the width of the distribution of the reflected beam became slightly wider than that in air. Although neutron reflectometry for the characterization of surface roughness has various limitations, it is still an effective tool for nondestructively observing the surface roughness at a buried contacting surface. © 2009 The Japan Society of Applied Physics.

DOI： 10.1143/JJAP.48.126504

Neutron interferometric search for short-range gravity 査読有り

Gudkov V., Greene G., Shimizu H.

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 611 巻 ( 2-3 ) 頁： 153 - 156 2009年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

We discuss the coherent nature of neutron interactions and properties of low-energy neutrons with the view of the possibility to search for "anomalous" forces with ranges from nuclear sizes up to the macroscopic scale. © 2009 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2009.07.042

Highly polarized very cold neutrons through a permanent magnet quadrupole 査読有り

Taketani, K; Mishima, K; Ino, T; Yoshioka, T; Muto, S; Morishima, T; Shimizu, HM; Oku, T; Suzuki, J; Shinohara, T; Sakai, K; Sato, H; Hirota, K; Otake, Y; Kitaguchi, M; Hino, M; Seki, Y; Iwashita, Y; Yamada, M; Ichikawa, M; Sugimoto, T; Kawasaki, S; Komamiya, S; Kamiya, Y; Otono, H; Yamashita, S; Geltenbort, P

PHYSICA B-CONDENSED MATTER 404 巻 ( 17 ) 頁： 2643 - 2645 2009年9月

掲載種別：研究論文（学術雑誌）出版者・発行元：Physica B Condensed Matter

We obtained highly polarized very cold neutrons through a quadrupole magnet with a large aperture. When neutrons go through a quadrupole magnet, parallel-spin neutrons are attracted to the magnet axis and anti-parallel-spin neutrons are repelled off the axis. Therefore, the neutrons through a sufficiently long quadrupole magnet have completely parallel-spin. At the downstream of the quadrupole magnet, we placed another quadrupole magnet to divide neutrons into two regions depending on their spin directions. We obtained the neutron polarization from the integrated count of the two regions and found it was 99.88±0.09 (stat.)±0.05 (syst.)%. © 2009 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2009.06.045

Development of modulating permanent magnet sextupole lens for focusing of pulsed cold neutrons 査読有り

Yamada, M; Iwashita, Y; Ichikawa, M; Sugimoto, T; Tongu, H; Fujisawa, H; Shimizu, HM; Ino, T; Mishima, K; Taketani, K; Yoshioka, T; Muto, S; Morishima, T; Oku, T; Suzuki, J; Shinohara, T; Sakai, K; Sato, H; Hirota, K; Otake, Y; Seki, Y; Kawasaki, S; Komamiya, S; Kamiya, Y; Otono, H; Yamashita, S; Geltenbort, P

PHYSICA B-CONDENSED MATTER 404 巻 ( 17 ) 頁： 2646 - 2651 2009年9月

掲載種別：研究論文（学術雑誌）出版者・発行元：Physica B Condensed Matter

Modulating permanent magnet sextupole lens (PMSx) for focusing pulsed cold neutrons is under development. The synchronized modulation of its field gradient suppresses the chromatic aberration which arises from the Time Of Flight method. The strength of the magnetic field, the torque, and the rise of temperature during its operation are studied on a fabricated prototype. Experiments on focusing pulsed very cold neutrons (VCN) at ILL (Institute of Laue Langevin, France) were carried out and VCN with around λ=40 Å were focused by the PMSx at a focal length of about 0.5 m. The experimental results are presented in conjunction with the principle of the neutron focusing and the modulating method of the focal strength of permanent magnet lens with the double ring structure. © 2009 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2009.06.132

Design of neutron beamline for fundamental physics at J-PARC BL05 査読有り

Mishima, K; Ino, T; Sakai, K; Shinohara, T; Hirota, K; Ikeda, K; Sato, H; Otake, Y; Ohmori, H; Muto, S; Higashi, N; Morishima, T; Kitaguch, M; Hino, M; Funahashi, H; Shima, T; Suzuki, J; Niita, K; Taketani, K; Seki, Y; Shimizu, HM

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 600 巻 ( 1 ) 頁： 342 - 345 2009年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

A new beamline for a fundamental physics experiment is under construction at BL05 port in the Materials and Life Science Facility (MLF) at Japan Proton Accelerator Research Complex (J-PARC); this beamline is designed using novel techniques of neutron optics and it is termed "Neutron Optics and Physics." The beam from the moderator is deflected by multi-channel supermirrors and split into three branches for individual experiments. In this study, we have optimized the design of the beam optics and shields using the Monte Carlo simulation package PHITS. The neutron fluxes of beams are expected to be 9.2×10<sup>5</sup> /cm<sup>2</sup>/μstr/s/MW, 1.2×10<sup>9</sup> /cm<sup>2</sup>/s/MW, and 4.0×10<sup>8</sup> /cm<sup>2</sup>/s/MW, with polarization of 99.8%. © 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2008.11.087

Pulsed neutron beam control using a magnetic multiplet lens 査読有り

Oku T., Shinohara T., Suzuki J.i., Pynn R., Shimizu H.M.

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 600 巻 ( 1 ) 頁： 100 - 102 2009年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

As a magnetic neutron lens based on a sextupole magnet to focus neutrons has chromatic aberration, it has been proposed that the chromatic aberration can be compensated in the pulsed neutron beam focusing by combining the focusing and defocusing functions of the multiplet magnetic lens system synchronously with time-of-flight (TOF) of neutrons. In this study, we performed numerical simulations on the multiplet magnetic lens system to investigate how a pulsed neutron beam can be controlled on the basis of the TOF method. It was then confirmed that the chromatic aberration can be compensated and the focal condition can be maintained over a certain λ-range by utilizing plural magnetic lenses in series and choosing the focusing and defocusing function of each magnetic lens synchronously with TOF of neutrons. © 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2008.11.055

A CCD-based Pixel Detector with Micron Spatial Resolution for Ultra Cold Neutrons 査読有り

Go Ichikawa, Shinsuke Kawasaki, Sachio Komamiya, Yoshio Kamiya, Tomoyuki Sanuki, Hirohiko M. Shimizu, Masahiro Hino, Masaaki Kitaguchi

2009 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-5 頁： 1619 - + 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

We have developed a pixel detector for ultra-cold neutrons using a commercial CCD. In order to detect neutrons, a thin neutron converting layer is directly formed on the CCD surface. The detection efficiencies for cold, very-cold and ultra-cold neutrons are measured to be 1.7%, 4.05 +/- 0.08 +/- 0.12% and 40.6 +/- 0.7 +/- 2.8%, respectively. The spatial resolutions were measured to be 2.9 +/- 0.1 mu m for horizontal direction and 4.4 +/- 0.2 mu m for vertical direction. The vertical and horizontal directions are determined by the charge transfer mechanism of CCDs. The details of the pixel detector and its performance tests are described.

DOI： 10.1109/NSSMIC.2009.5402255

Slow Neutron Optics 査読有り

Hirohiko M. Shimizu

TRANSACTIONS OF THE MATERIALS RESEARCH SOCIETY OF JAPAN, VOL 33, NO 3 33 巻 ( 3 ) 頁： 541 - 545 2008年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：MATERIALS RESEARCH SOCIETY JAPAN-MRS-J

We survey the current status of reflective neutron optical devices, compound refractive and magnetic ones for enhancing the effectiveness of the beam utilization to extract physics information of samples.

Highly polarized cold neutron beam obtained by using a quadrupole magnet 査読有り

Oku, T; Yamada, S; Shinohara, T; Suzuki, JI; Mishima, K; Hirota, K; Sato, H; Shimizu, HM

PHYSICA B-CONDENSED MATTER 397 巻 ( 1-2 ) 頁： 188 - 191 2007年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physica B Condensed Matter

We performed a cold neutron polarization experiment using a polarization device based on a quadrupole magnet. By passing through the aperture of the quadrupole magnet, positive and negative polarity neutrons are accelerated in opposite directions and spatially separated due to the magnetic field gradient. Then, we extracted the one-spin component and analyzed the polarization degree by using a sextupole magnet and position-sensitive detector. As a result, very high neutron polarization degree P=0.9993±0.0025 was obtained. Advantages of the quadrupole magnet as the neutron polarization device and its application to neutron scattering experiments are discussed. © 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2007.02.055

Moire Fringes in a Neutron Spin Interferometer

Taketani Kaoru, Seki Yoshichika, Funahashi Haruhiko, HINO Masahiro, KITAGUCHI Masaaki, OTAKE Yoshie, SHIMIZU Hirohiko M.

Journal of the Physical Society of Japan 76 巻 ( 6 ) 頁： "64008 - 1"-"64008-7" 2007年6月

出版者・発行元：一般社団法人日本物理学会

We have revealed the criterion to observe moire fringes in a neutron spin interferometry. In former studies using wave front division, neutron beam had to be collimated by fine slits. On the other hand, we have succeeded to observe moire fringes with divergence angle of 8.3 mrad using spin polarization division. A model based on partial coherence theory has been developed and verified experimentally. These results will be the basis for neutron wave front manipulation technique using magnetic birefringence.

Moire fringes in a neutron spin interferometer

Taketani, K; Seki, Y; Funahashi, H; Hino, M; Kitaguchi, M; Otake, Y; Shimizu, HM

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 76 巻 ( 6 ) 頁： 064008 - 064008 2007年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人日本物理学会

We have revealed the criterion to observe moiré fringes in a neutron spin interferometry. In former studies using wave front division, neutron beam had to be collimated by fine slits. On the other hand, we have succeeded to observe moiré fringes with divergence angle of 8.3 mrad using spin polarization division. A model based on partial coherence theory has been developed and verified experimentally. These results will be the basis for neutron wave front manipulation technique using magnetic birefringence. ©2007 The Physical Society of Japan.

DOI： 10.1143/JPSJ.76.064008

Low energy particle detector using a superconducting transition edge sensor 査読有り

Ohno, M; Sato, H; Mishima, K; Ikeda, T; Shimizu, HM

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 17 巻 ( 2 ) 頁： 328 - 331 2007年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE Transactions on Applied Superconductivity

Precise measurement of neutron beta decay tests predictions of the Standard Model of electroweak interaction. The co-efficient a of the antineutrino/electron angular correlation is determined by measuring the energy spectrum of the recoil protons generated in the neutron beta decay. A proton spectrometer required for this measurement demands high detection efficiency, high energy resolution and a large detection area. We have begun development of a Transition Edge Sensor (TES) microcalorimeter for use as a low energy particle detector. To realize the large detection area we have designed a pixelated TES array incorporating a parallel biasing scheme. Our TES device consists of 4-pixels using a Au/Ti/Au trilayer film adjusted to a superconducting transition temperature of Tc ∼ 380 mK. This temperature is convenient for use in a 3He cryostat with a pulse tube refrigerator. The Au films improve thermal conductivity, thereby reducing position dependent effects and allow an increased detector area. © 2007 IEEE.

DOI： 10.1109/TASC.2007.898057

Wide-<i>q</i> observation from 10<SUP>-4</SUP> to 2.0 A<SUP>-1</SUP> using a focusing and polarized neutron small-angle scattering spectrometer, SANS-J-II 査読有り Open Access

Iwase, H; Koizumi, S; Suzuki, JI; Oku, T; Sasao, H; Tanaka, H; Shimizu, HM; Hashimoto, T

JOURNAL OF APPLIED CRYSTALLOGRAPHY 40 巻 ( SUPPL. 1 ) 頁： S414 - S417 2007年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Applied Crystallography

In order to extend an upper q-limit [q is the magnitude of the scattering vector q, defined by q = (4π/λ)sinθ, where λ and 2θ are the wavelength and the scattering angle, respectively], high-angle <sup>3</sup>He sub-detectors were installed on a focusing and polarized neutron small-angle scattering spectrometer (SANS-J-II) at JRR-3, Tokai, Japan. Consequently, the upper q-limit was improved from 0.2 to 2.0 Å<sup>-1</sup>. To quantitatively discriminate spin incoherent scattering from hydrogen or to perform nuclear spin polarization contrast variation, a remanent supermirror analyser is also available on the high-angle sub-detector. By combining a focusing ultra-small-angle scattering, realised by compound and/or magnetic lens and high-resolution area detector, SANS-J-II is able to cover from 3 × 10<sup>-4</sup> to 2.0 Å<sup>-1</sup> (four orders of magnitude of q), which benefits investigation of hierarchically ordered systems, found widely in hard, soft and bio-materials. © International Union of Crystallography 2007.

DOI： 10.1107/S0021889807006280

Focusing and polarized neutron small-angle scattering spectrometer (SANS-J-II). The challenge of observation over length scales from an angstrorm to a micrometre 査読有り Open Access

Koizumi, S; Iwase, H; Suzuki, JI; Oku, T; Motokawa, R; Sasao, H; Tanaka, H; Yamaguchi, D; Shimizu, HM; Hashimoto, T

JOURNAL OF APPLIED CRYSTALLOGRAPHY 40 巻 ( SUPPL. 1 ) 頁： S474 - S479 2007年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Applied Crystallography

SANS-J (a pinhole small-angle neutron scattering spectrometer at research reactor JRR3, Tokai, Japan) was reconstructed as a focusing and polarized neutron small-angle scattering spectrometer (SANS-J-II). By employing focusing lenses of a biconcave MgF<inf>2</inf> crystal or of a sextupole permanent magnet and a high-resolution photomultiplier, the minimum accessible magnitude of the scattering vector q min was improved from 3 × 10<sup>-3</sup> Å<sup>-1</sup> to an ultra-small-angle scattering (USAS) of 3 × 10<sup>-4</sup> Å<sup>-1</sup>. Compared with a Bonse-Hart double-crystal method, the advantages of focusing USAS are the efficient detection of anisotropic USAS with an area detector, an improvement in q resolution Δq/q at conventional magnitudes of the scattering vector q ∼ 10 <sup>-3</sup> Å<sup>-1</sup> and a gain in neutron flux in the conventional q region of q ∼ 10<sup>-3</sup> Å<sup>-1</sup>. © International Union of Crystallography 2007.

DOI： 10.1107/S0021889807014392

A focusing-geometry small-angle neutron scattering instrument with a magnetic neutron lens 査読有り Open Access

Oku, T; Iwase, H; Shinohara, T; Yamada, S; Hirota, K; Koizumi, S; Suzuki, JI; Hashimoto, T; Shimizu, HM

JOURNAL OF APPLIED CRYSTALLOGRAPHY 40 巻 ( SUPPL. 1 ) 頁： S408 - S413 2007年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Applied Crystallography

We have constructed a focusing-geometry small-angle neutron scattering (FSANS) instrument, SANS-J-II, with two kinds of neutron focusing device: a series of compound refractive lenses made of MgF<inf>2</inf> and a magnetic neutron lens based on an extended Halbach-type sextupole magnet. In this study, we investigated the performance of the FSANS instrument with the magnetic neutron lens. The intensity distribution of a direct neutron beam focused on the detector plane by the magnetic neutron lens had a ratio of the peak height to the background level of ∼6 × 10<sup>4</sup> for a polarized neutron beam with a polarization degree of ∼0.99. It is found that a minimum value of the measurable q range [where q is the modulus of the scattering vector and is defined as q = (4π/λ)sin(θ/2), where θ is the scattering angle and λ is the neutron wavelength], q<inf>min</inf>, of 6.5 × 10<sup>-4</sup> Å<sup>-1</sup> can be achieved by the FSANS instrument with the magnetic neutron lens using neutrons with λ = 6.6 Å and Δλ/λ = 0.13 for the full width at half maximum. © International Union of Crystallography 2007.

DOI： 10.1107/S0021889807003822

X-ray detection using superconducting tunnel junction shaped normal-distribution-function 査読有り

Taino, T; Nishihara, T; Hoshino, K; Myoren, H; Sato, H; Shimizu, HM; Takada, S

IEICE TRANSACTIONS ON ELECTRONICS E90C 巻 ( 3 ) 頁： 566 - 569 2007年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IEICE Transactions on Electronics

A normal-distribution-function-shaped superconducting tunnel junction (NDF-STJ) which consists of Nb/Al-AlO<inf>x</inf>/Al/Nb has been fabricated as an X-ray detector. Current - voltage characteristics were measured at 0.4 K using three kinds of STJs, which have the dispersion parameters σ of 0.25, 0.45 and 0.75. These STJs showed very low subgap leakage current of about 5 nA. By irradiating with 5.9 keV X-rays, we obtained the spectrum of these NDF-STJs. They showed good energy resolution with small magnetic fields of below 3 mT, which is about one-tenth of those for conventional-shaped STJs. Copyright © 2007 The Institute of Electronics, Information and Communication Engineers.

DOI： 10.1093/ietele/e90-c.3.566

多チャンネル検出器システムへ向けたアナログーデジタル変換器の開発

山崎拓朗, 宮嶋茂之, 佐藤広海, 清水裕彦, 藤巻朗

電子情報通信学会技術研究報告. SCE, 超伝導エレクトロニクス 106 巻 ( 503 ) 頁： 7 - 12 2007年1月

出版者・発行元：一般社団法人電子情報通信学会

超伝導トンネル接合素子(以下STJ: Superconducting Tunnel Junction)は半導体検出器に比べてエネルギー分解能が一桁以上高く、非常に精度のよい検出ができる。その反面、面積を大きくすることができず有感領域が小さいといった問題がある。そこで我々はSTJの実効的有感面積を拡大させるために、STJ、アナログ-デジタル(AD)変換器、単一磁束量子(SFQ)信号処理回路を用いて構築できる多チャンネル検出器システムを考案した。このシステムの実現のための最初のステップとして超伝導AD変換器とSTJ検出器との統合を試みた。STJの動作状況はチャンバー内にSFQ回路の障害となり得る磁場を発生させるなど必ずしもSFQ回路の動作環境として相応しくない。我々はこの問題に対して磁気シールドなどの対策を施しSTJ用クライオスタット内での超伝導AD変換器の正常動作を確認した。

Small-angle neutron scattering (SANS) and dynamic light scattering (DLS) analyses of the initial aggregation process of tau by oxidative stress 査読有り

Sachio Naito, Susumu Ikeda, Hirohiko Shimizu, Hideki Mochizuki, Toru Yasuda, Yoshikuni Mizuno, Michihiro Furusaka, Satoru Fujiwara, Junichi Suzuki, keiji Wada

NEUROSCIENCE RESEARCH 58 巻頁： S176 - S176 2007年

超伝導検出器アレイを用いたテラヘルツイメージング

有吉誠一郎, 大谷知行, ドブロユアドリアン, 松尾宏, 佐藤広海, 田井野徹, 川瀬晃道, 清水裕彦

電子情報通信学会技術研究報告. ED, 電子デバイス 106 巻 ( 403 ) 頁： 59 - 63 2006年12月

出版者・発行元：一般社団法人電子情報通信学会

電波と光波の境界領域に位置するテラヘルツ波は、物質に対する透過性と吸収スペクトルを利用した物質同定性を併せ持つなど、他の波長帯では見られない特長を有し、産業分野の製造ラインなどでの非破壊透視検査、薬品検査や癌診断などの医薬分野応用、天文観測研究など、様々な分野での応用が期待されている。しかし、このバンドで超高感度かつ短時間イメージングを行うために必要な多素子検出技術は未開拓である。そこで我々は、超伝導トンネル接合素子(STJ)を用いた超高感度テラヘルツ光検出器とそのイメージングアレイ化に向けた研究開発を行っている。検出器1画素の膜構造は、ニオブ超伝導体の平面アンテナと超伝導マイクロストリップラインをSTJ素子で橋渡ししており、光子誘起トンネル現象を検出原理とする。本稿では、STJ検出器の概要とリニアアレイを用いたイメージング試験結果とともに、その将来性について述べる。

THz波検出用基板吸収型超伝導トンネル接合素子

田井野徹, 石井宏和, 吉村正太, 明連広昭, 高田進, 大谷知行, 有吉誠一郎, 佐藤広海, 清水裕彦, 川瀬晃道

電子情報通信学会技術研究報告. ED, 電子デバイス 106 巻 ( 403 ) 頁： 53 - 57 2006年12月

出版者・発行元：一般社団法人電子情報通信学会

近年テラヘルツ波は工学、医学、理学など様々な分野で注目を集めている。我々はテラヘルツ波の新たな検出器として、超伝導トンネル接合素子(STJ)に着目し、その検出器開発を行っている。我々の提案する検出器は、STJ直下に存在する基板に対してテラヘルツ波を照射して、基板内で発生するフォノンを利用する"基板吸収型STJ"である。本論文では、基板吸収型STJを用いたテラヘルツ波検出のこれまでの実験について報告する。

Thermal neutron refraction by material prism 査読有り

Shinohara, T; Hirota, K; Adachi, T; Ikeda, K; Shimizu, HM; Suzuki, JI; Oku, T

PHYSICA B-CONDENSED MATTER 385-86 巻頁： 1232 - 1235 2006年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physica B Condensed Matter

Neutron refractive optics is a powerful tool for beam focusing due to its large effective aperture compared to reflective optics. Because neutron refraction angle decreases with shorter wavelengths, the application of refractive optics has been restricted to the cold neutron range. To expand the applicable wavelength range, we have developed a new refractive optics using an amorphous perfluoropolymer. This refractive optics is composed of several hundred thin sheets, each of which has a large number of grooves on the top surface. The refraction experiment was performed at the H-8 beam port of KENS, and it was confirmed that the thermal neutron beam can be refracted using this material prism. © 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2006.05.418

Moire fringes of cold neutron with large divergence angle 査読有り

Taketani, K; Funahashi, H; Seki, Y; Hino, M; Kitaguchi, M; Otake, Y; Shimizu, HM

PHYSICA B-CONDENSED MATTER 385-86 巻頁： 1222 - 1224 2006年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physica B Condensed Matter

Moiré fringes were observed as a bright and high-contrast image using a neutron spin interferometer with a relatively divergent cold neutron beam at the MINE2 beam line of JRR-3M. The two spin states were selectively deflected with the relative angle in the range of 92-184 nrad on transmission through the magnetic field gradient in the range of 3.2-6.4 G/cm produced by a 5 cm long quadrupole electromagnet. We analyzed the result with a first-order calculation taking into account the finite beam divergence and found that the beam divergence is required to be less than the angular separation of individual Moiré loci, for the observation of Moiré fringes, and is not required to be less than the angular separation of the two beam paths. © 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2006.05.412

Development of a multichannel parabolic guide for thermal neutron beam focusing 査読有り

Yamada, S; Shinohara, T; Sasao, H; Oku, T; Suzuki, JI; Matsue, H; Shimizu, HM

PHYSICA B-CONDENSED MATTER 385-86 巻頁： 1243 - 1246 2006年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physica B Condensed Matter

We have developed a multichannel parabolic guide for thermal neutron beam focusing. The guide was designed with multichannel structure, seven channels in the present case, to focus a neutron beam with wide cross section effectively. The multichannel structure is made with parabolically bent NiC/Ti supermirrors with critical reflection angles m = 3.0 and 3.6 times as much as that of nickel and thickness of 0.55 mm. The guide consists of two focusing devices with each length of 900 mm, which are separated by a gap of 150 mm for neutron beta decay experiments. The focal length of the guide is 995 mm away from the exit of the guide. The cross section of the guide is 90 × 20 mm<sup>2</sup> at the entrance and 52.3 × 12.1 mm<sup>2</sup> at the exit. The guide was installed at a thermal neutron beam line for neutron-induced prompt gamma-ray analysis (PGA) of JRR-3M in JAEA with straight supermirror guides with m = 3.0. Focusing properties of the parabolic guide were measured at the focal point with a CCD imaging system and we obtained a gain of 9.6 and 4.1 in peak flux compared with those in cases of using the vacuum tube and the straight guide, respectively. The parabolic guide has been successfully used to enhance the efficacy of PGA and have also applied to neutron beta decay experiments. © 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2006.05.420

Development of measurement system of neutron β decay 査読有り

Mishima, K; Yamada, S; Sato, H; Hirota, K; Shinohara, T; Morishima, T; Suzuki, JI; Oku, T; Shimizu, HM

PHYSICA B-CONDENSED MATTER 385-86 巻頁： 1219 - 1221 2006年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physica B Condensed Matter

Precise measurement of neutron β decay allows determining the coupling constant of weak interaction independent of any nuclear structure. We have developed measurement system of neutron β decay at a thermal neutron beamline in JRR-3, JAEA. By using coincidence technique of two kinds of detectors, we have succeeded in detecting the signal of neutron β decay with S/N of 0.63 and count rate of 0.40 cps. © 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2006.05.414

Development of neutron Anger-camera detector based on flatpanel PMT 査読有り

Hirota, K; Satoh, S; Sakai, K; Shinohara, T; Ikeda, K; Mishima, K; Yamada, S; Oku, T; Suzuki, J; Furusaka, M; Shimizu, HM

PHYSICA B-CONDENSED MATTER 385-86 巻頁： 1297 - 1299 2006年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physica B Condensed Matter

A neutron scintillating detector and its data taking system have been developed for neutron scattering measurement. A 64-channel flatpanel photomultiplier is used for the Anger-camera method. The detection efficiency of γ-ray background is very low in the use of the ZnS/<sup>6</sup>LiF scintillator. The spatial resolution is less than 1 mm. The effective area of this detector is around 25 cm<sup>2</sup>, and it is easy to expand it to a larger area with small dead space using the multi-photomultiplier tubes system. The fast DAQ system has 10-bit 100 MHz flash ADCs, FPGA chips and USB2.0 device. © 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2006.06.058

A magnetic neutron lens based on an extended Halbach-type permanent sextupole magnet 査読有り

Oku, T; Yamada, S; Sasao, H; Suzuki, JI; Shinohara, T; Hirota, K; Ikeda, K; Tsuzaki, T; Kiyanagi, Y; Furusaka, M; Shimizu, HM

PHYSICA B-CONDENSED MATTER 385-86 巻頁： 1225 - 1228 2006年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physica B Condensed Matter

We have developed a magnetic neutron lens (MNL) based on an extended Halbach-type permanent sextupole magnet. The effective aperture size is 30 mm in diameter and the length is 2400 mm. The sextupole magnetic field distribution |B|=(G/2) r<sup>2</sup> with the gradient coefficient G=10,660±530 T/m<sup>2</sup> are generated inside the magnet, where r is the distance from the magnet center axis. The neutron-focusing property is investigated by using pulsed polarized neutrons. The obtained results are discussed in comparison with numerical simulation results. The application to the focusing-geometry small-angle neutron scattering experiments is discussed. © 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2006.05.416

Focusing and polarized neutron ultra-small-angle scattering spectrometer (SANS-J-II) at Research Reactor JRR3, Japan 査読有り

Koizumi S., Iwase H., Suzuki J.i., Oku T., Motokawa R., Sasao H., Tanaka H., Yamaguchi D., Shimizu H.M., Hashimoto T.

Physica B Condensed Matter 385-86 巻頁： 1000 - 1006 2006年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Physica B Condensed Matter

By employing focusing lenses of sextupole permanent magnet and biconcave MgF<inf>2</inf> crystal, and high-resolution photomultiplier, SANS-J (pinhole small-angle neutron scattering spectrometer at research reactor JRR3, Tokai) was reconstructed to focusing and polarized neutron ultra-small-angle scattering spectrometer (SANS-J-II). Consequently, an accessible minimum wave number q<inf>min</inf> was improved from 3×10<sup>-3</sup> Å<sup>-1</sup> to 3×10<sup>-4</sup> Å<sup>-1</sup>. Furthermore, we added <sup>3</sup>He sub-detectors with an analyzer super mirror at a sample position. With this setup, we perform polarization analysis at high q (>0.2 Å<sup>-1</sup>) in order to quantitatively discriminate spin incoherent scattering from hydrogen or to perform spin contrast variation, by a dynamic nuclear polarization method (>0.2 Å<sup>-1</sup>). © 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2006.05.320

Superconducting Detector Array for Terahertz Imaging Applications

Ariyoshi Seiichiro, Otani Chiko, Dobroiu Adrian, MATSUO Hiroshi, SATO Hiromi, TAINO Tohru, KAWASE Kodo, SHIMIZU Hirohiko M.

Japanese journal of applied physics. Pt. 2, Letters 45 巻 ( 37 ) 頁： L1004 - L1006 2006年10月

Superconducting detector array for terahertz imaging applications 査読有り

Ariyoshi, S; Otani, C; Dobroiu, A; Matsuo, H; Sato, H; Taino, T; Kawase, K; Shimizu, HM

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS 45 巻 ( 37-41 ) 頁： L1004 - L1006 2006年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Japanese Journal of Applied Physics Part 2 Letters

We designed, fabricated, and characterized a superconducting detector array for terahertz imaging applications. To evaluate the optical performance as an imaging array, we measured the spectral response of a 5-pixel linear array detector, and confirmed its sensitivity peaks to be at the same frequency within accuracy of one percent in the range of 0.65 THz. The frequency peaks are also in good agreement with a numerical calculation. This linear array was tested in the nondestructive imaging of a metallic pattern and an integrated-circuit card, and allowed the shortening of the total acquisition time. High fabrication yield of about 99% was achieved for single superconducting tunnel junctions, which led to 90% yield for the detectors. ©2006 The Japan Society of Applied Physics.

DOI： 10.1143/JJAP.45.L1004

超伝導トンネル接合素子を用いたテラヘルツ波検出器アレイの開発とイメージング

大谷知行, 有吉誠一郎, 田井野徹, 川瀬晃道, 佐藤広海, 清水裕彦

電子情報通信学会技術研究報告. ED, 電子デバイス 105 巻 ( 629 ) 頁： 1 - 6 2006年2月

出版者・発行元：一般社団法人電子情報通信学会

テラヘルツ波は、適度な物質透過性と空間分解能や指紋スペクトルによる物質同定能力といった魅力的な特長を有し、近年の発生・分光手法の進展にともないイメージングをはじめとする様々な応用が提案されてきている。一方で、イメージングデバイスの開発は進んでおらずアレイ型の高性能検出器が求められている。我々は、テラヘルツイメージングの新デバイス開発として、超伝導トンネル接合素子を用いた2種の検出器の開発と応用開拓を進めている。本稿では、光補助トンネリングを用いた検出器アレイ、および、基板吸収を用いた広帯域検出器のそれぞれについて、検出器の概要、動作原理、性能、及び、イメージングに向けた取り組みについて紹介する。

Direct and Indirect Detection of Terahertz Waves using a Nb-based Superconducting Tunnel Junction 査読有り Open Access

Otani Chiko, Nakano Ran, Taino Tohru, Shibuya Takayuki, Ariyoshi Seiichiro, Yoshimura Shota, Myoren Hiroaki, Sato Hiromi, Shimizu Hirohiko M., Takada Susumu, Kawase Kodo

7TH EUROPEAN CONFERENCE ON APPLIED SUPERCONDUCTIVITY (EUCAS'05) 43 巻 ( 1 ) 頁： 1303 - 1306 2006年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：Journal of Physics: Conference Series

We are developing a broadband THz detectors using Nb-based superconducting tunnel junctions. We found two components in a current signal for 1-2 THz pulse input. From the comparison of results obtained for the signals, the frequency response for the different size of STJs and the STJs fabricated on different substrate materials, we demonstrate that they correspond to photons absorbed with the superconductor electrode (referred as 'direct' component) and phonons generated by photons absorbed with the substrate (referred as 'phononmediated' component). © 2006 IOP Publishing Ltd.

DOI： 10.1088/1742-6596/43/1/318

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