Updated on 2024/10/22

写真a

 
KITAGUCHI Masaaki
 
Organization
Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI) Associate professor
Graduate School
Graduate School of Science
Title
Associate professor
Contact information
メールアドレス

Degree 1

  1. 博士(理学) ( 2004.5   京都大学 ) 

Research Interests 3

  1. Particle Physics

  2. Nuclear Physics

  3. Neutron Optics

Research Areas 1

  1. Natural Science / Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics

Research History 6

  1. Nagoya University   Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI)   Associate professor

    2019.10

  2. Nagoya University   Center for Experimental Studies Division of Flavor Physics   Associate professor

    2013.4 - 2019.9

  3. Nagoya University   Graduate School of Science Division of Particle and Astrophysical Sciences Elementary Particle Physics   Associate professor

    2013.2 - 2013.3

  4. Nagoya University   Kobayashi-Maskawa Institute   Associate professor

    2013.2

  5. Research Reactor Institute, Kyoto University   Neutron Optics   Assistant Professor

    2004.11 - 2013.1

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    Country:Japan

  6. Research Reactor Institute, Kyoto University   Neutron Optics   Asistant Professor

    2004.11 - 2013.1

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Education 3

  1. Kyoto University   Graduate School, Division of Natural Science

    1999.4 - 2004.5

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    Country: Japan

  2. Kyoto University   Graduate School, Division of Natural Science

    1999.4 - 2004.5

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    Country: Japan

  3. Kyoto University   Graduate School, Division of Natural Science

    1999.4 - 2004.5

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    Country: Japan

Professional Memberships 4

  1. The Physical Society of Japan

  2. Japanese Society for Neutron Science

  3. The Physical Society of Japan

  4. Japanese Society for Neutron Science

Committee Memberships 8

  1. The Physical Society of Japan   Scientific secretary, Division of Experimental Nuclear Physics  

    2023.4 - 2024.3   

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    Committee type:Academic society

  2. The P6 Sub-Committee of the Neutron Science Proposal Review Committee of J-PARC/MLF   Chair  

    2020.1 - 2023.9   

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    Committee type:Other

  3. The Japanese Society of Neutron Science   Executive secretary for general affairs  

    2017.4 - 2019.3   

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    Committee type:Academic society

  4. The Japanese Society of Neutron Science   Executive secretary for general affairs  

    2017.4 - 2019.3   

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    Committee type:Academic society

  5. 日本中性子科学会   庶務幹事  

    2017.4 - 2019.3   

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    Committee type:Academic society

  6. NOP2017 Local Organizing Committee   Chair  

    2017.1 - 2018.11   

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    Committee type:Other

  7. NOP2017 Local Organizing Committee   Chair  

    2017.1 - 2018.11   

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    Committee type:Other

  8. NOP2017現地実行委員会   現地実行委員長  

    2017.1 - 2018.11   

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    Committee type:Other

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Awards 1

  1. The Japanese Society of Neutron Science Young Scientist Award

    2005.12   The Japanese Society of Neutron Science  

    KITAGUCHI Masaaki

 

Papers 179

  1. Development of Neutron Interferometer Using Multilayer Mirrors and Measurements of Neutron-Nuclear Scattering Length with Pulsed Neutron Source Reviewed International journal

    Takuhiro Fujiie, Masahiro Hino, Takuya Hosobata, Go Ichikawa, Masaaki Kitaguchi, Kenji Mishima, Yoshichika Seki, Hirohiko M. Shimizu, Yutaka Yamagata

    Physical Review Letters   Vol. 132 ( 2 )   2024.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/PhysRevLett.132.023402

    Web of Science

    PubMed

    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.132.023402/fulltext

  2. A Study of Oscillating Magnetic Fields with Neutron Spin Interferometry Reviewed International journal

    Suzuki, T; Fujitani, R; Tasaki, S; Hino, M; Kitaguchi, M; Oda, T; Nakamura, R

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 93 ( 9 )   2024.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.7566/JPSJ.93.091008

    Web of Science

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

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

    Progress of Theoretical and Experimental Physics   Vol. 2024 ( 9 )   2024.9

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    Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    Abstract

    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 required to reach a precision of 1 s in the neutron lifetime experiment 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 uncertainties, such as background evaluation, fostering further advancements in the neutron lifetime experiments at J-PARC.

    DOI: 10.1093/ptep/ptae123

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    Other Link: https://academic.oup.com/ptep/article-pdf/2024/9/093G01/59179657/ptae123.pdf

  4. Circular polarization measurement for individual gamma rays in capture reactions with intense pulsed neutrons Reviewed International coauthorship International journal

    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, HM; Shizuma, T; Taira, Y; Takada, S; Takahashi, S; Yoshikawa, H; Yoshioka, T; Zen, HS

    EUROPEAN PHYSICAL JOURNAL A   Vol. 60 ( 8 )   2024.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1140/epja/s10050-024-01392-6

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  5. Polarized Cold-neutron Reflectometry at JRR-3/MINE2 for the Development of Ultracold-neutron Spin Analyzers for a Neutron EDM Experiment at TRIUMF

    Higuchi, T; Akatsuka, H; Brossard, A; Fujimoto, D; Giampa, P; Hansen-Romu, S; Hatanaka, K; Hino, M; Chikawa, G; Imajo, S; Jamieson, B; Kawasaki, S; Kitaguchi, M; Mammei, R; Matsumiya, R; Mishima, K; Picker, R; Schreye, W; Shimizu, HM; Sidhu, S; Vanbergen, S

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 93 ( 9 )   2024.7

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

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

    CLASSICAL AND QUANTUM GRAVITY   Vol. 41 ( 11 )   2024.6

  7. Combination of crystal growth with optical floating zone and evaluation of Nd<SUP>3+</SUP>:LaAlO<sub>3</sub> crystals with the dynamic nuclear polarization of <SUP>139</SUP>La and <SUP>27</SUP>Al Reviewed International coauthorship International journal

    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, HM; Yosoi, M

    REVIEW OF SCIENTIFIC INSTRUMENTS   Vol. 95 ( 6 )   2024.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/5.0202680

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    PubMed

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

    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, HM; Shimomura, K; Tada, H; Torii, HA

    PHYSICS   Vol. 6 ( 2 ) page: 877 - 890   2024.6

  9. 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 Reviewed International coauthorship International journal

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

    Physical Review C   Vol. 109 ( 4 )   2024.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    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

    Web of Science

    Scopus

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

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

    Physical Review C   Vol. 109 ( 4 )   2024.4

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    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

    Web of Science

    Scopus

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

    Strasser, P; Fukumura, S; Iwai, R; Kanda, S; Kawamura, S; Kitaguchi, M; Nishimura, S; Seo, S; Shimizu, HM; Shimomura, K; Tada, H; Torii, HA

    PHYSICAL REVIEW LETTERS   Vol. 131 ( 25 )   2023.12

  12. 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, HM

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 1057   2023.12

  13. Diffuse scattering model of ultracold neutrons on wavy surfaces Reviewed International journal

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

    Physical Review C   Vol. 108 ( 3 )   2023.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/physrevc.108.034605

    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevC.108.034605/fulltext

  14. Measurement of the spatial polarization distribution of circularly polarized gamma rays produced by inverse Compton scattering

    Taira, Y; Endo, S; Kawamura, S; Nambu, T; Okuizumi, M; Shizuma, T; Omer, M; Zen, HS; Okano, Y; Kitaguchi, M

    PHYSICAL REVIEW A   Vol. 107 ( 6 )   2023.6

  15. Angular distribution of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>γ</mml:mi></mml:math> rays from a neutron-induced <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>p</mml:mi></mml:math> -wave resonance of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Xe</mml:mi><mml:mprescripts /><mml:none /><mml:mn>132</mml:mn></mml:mmultiscripts></mml:math> Reviewed International coauthorship International journal

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

    Physical Review C   Vol. 107 ( 5 )   2023.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/PhysRevC.107.054602

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevC.107.054602/fulltext

  16. Characterization of electroless nickel-phosphorus plating for ultracold-neutron storage Reviewed International coauthorship International journal

    H. Akatsuka, T. Andalib, B. Bell, J. Berean-Dutcher, N. Bernier, C. P. Bidinosti, C. Cude-Woods, S. A. Currie, C. A. Davis, B. Franke, R. Gaur, P. Giampa, S. Hansen-Romu, M. T. Hassan, K. Hatanaka, T. Higuchi, C. Gibson, G. Ichikawa, I. Ide, S. Imajo, T. M. Ito, B. Jamieson, S. Kawasaki, M. Kitaguchi, W. Klassen, E. Korkmaz, F. Kuchler, M. Lang, M. Lavvaf, T. Lindner, M. Makela, J. Mammei, R. Mammei, J. W. Martin, R. Matsumiya, E. Miller, K. Mishima, T. Momose, S. Morawetz, C. L. Morris, H. J. Ong, C. M. O'Shaughnessy, M. Pereira-Wilson, R. Picker, F. Piermaier, E. Pierre, W. Schreyer, S. Sidhu, D. Stang, V. Tiepo, S. Vanbergen, R. Wang, D. Wong, N. Yamamoto

    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   Vol. 1049   2023.4

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    Electroless nickel plating is an established industrial process that provides a robust and relatively low-cost coating suitable for transporting and storing ultracold neutrons (UCN). Using roughness measurements and UCN-storage experiments we characterized UCN guides made from polished aluminum or stainless-steel tubes plated by several vendors. All electroless nickel platings were similarly suited for UCN storage with an average loss probability per wall bounce of 2.8 ⋅ 10-4 to 4.1 ⋅ 10-4 for energies between 90neV and 190neV, or a ratio of imaginary to real Fermi potential η of 1.7 ⋅ 10-4 to 3.3 ⋅ 10-4. Measurements at different elevations indicate that the energy dependence of UCN losses is well described by the imaginary Fermi potential. Some special considerations are required to avoid an increase in surface roughness during the plating process and hence a reduction in UCN transmission. Increased roughness had only a minor impact on storage properties. Based on these findings we chose a vendor to plate the UCN-production vessel that will contain the superfluid-helium converter for the new TRIUMF UltraCold Advanced Neutron (TUCAN) source, achieving acceptable UCN-storage properties with η=3.5(5)⋅10-4.

    DOI: 10.1016/j.nima.2023.168106

    Web of Science

    Scopus

  17. Investigation of neutron imaging applications using fine-grained nuclear emulsion Reviewed International coauthorship International journal

    Abdul Muneem, Junya Yoshida, Hiroyuki Ekawa, Masahiro Hino, Katsuya Hirota, Go Ichikawa, Ayumi Kasagi, Masaaki Kitaguchi, Naoto Muto, Kenji Mishima, Jameel-Un Nabi, Manami Nakagawa, Naotaka Naganawa, Takehiko R. Saito

    Journal of Applied Physics   Vol. 133 ( 5 ) page: 054902 - 054902   2023.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:AIP Publishing  

    Neutron imaging is a nondestructive inspection technique that has a wide range of applications. One of the important aspects of neutron imaging is achieving a micrometer-scale spatial resolution. The development of a high-resolution neutron detector is a challenging task. As one potential solution to this task, we investigate whether neutron detectors based on fine-grained nuclear emulsions are suitable for high-resolution neutron imaging applications. High track density is necessary to improve the quality of neutron imaging. However, the available track analysis methods are difficult to apply under high track density conditions. Simulated images are used to determine the required track density for neutron imaging. A track density of the order of [Formula: see text] tracks per [Formula: see text] is sufficient to utilize neutron detectors for imaging applications. Contrast resolution was also investigated for image datasets with various track densities and neutron transmission rates. Moreover, experiments were performed for the neutron imaging of gadolinium-based gratings with known geometries. The grating structures were successfully resolved. The calculated [Formula: see text] 10%–90% edge response using the grayscale optical images of the grating slit with a periodic structure of 9 [Formula: see text]m was [Formula: see text] [Formula: see text]m.

    DOI: 10.1063/5.0131098

    Web of Science

  18. Displacement-noise-free interferometeric gravitational-wave detector using unidirectional neutrons with four speeds Reviewed International journal

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

    PHYSICS LETTERS A   Vol. 458   2023.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.physleta.2022.128581

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  19. The LiNA experiment: Development of multi-layered time projection chamber Reviewed

    Naoyuki Sumi, Go Ichikawa, Kenji Mishima, Yasuhiro Makida, Masaaki Kitaguchi, So Makise, Shun Matsuzaki, Tomoya Nagano, Masaki Tanida, Hideaki Uehara, Kodai Yano, Hidetoshi Otono, Tamaki Yoshioka

    Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment     2023.1

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.nima.2022.167586

  20. Study of Thin Iron Films for Polarization Analysis of Ultracold Neutrons

    Hiroaki Akatsuka, Takashi Higuchi, Sean Hansen-Romu, Kichiji Hatanaka, Tomohiro Hayamizu, Masahiro Hino, Go Ichikawa, Sohei Imajo, Blair Jamieson, Shinsuke Kawasaki, Masaaki Kitaguchi, Ryohei Matsumiya, Kenji Mishima

    Proceedings of the 24th International Spin Symposium (SPIN2021)     2022.12

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Journal of the Physical Society of Japan  

    DOI: 10.7566/jpscp.37.020801

  21. The Precision nEDM Measurement with UltraCold Neutrons at TRIUMF

    Ryohei Matsumiya, Hiroaki Akatsuka, Chris P. Bidinosti, Charles A. Davis, Beatrice Franke, Derek Fujimoto, Michael T. W. Gericke, Pietro Giampa, Robert Golub, Sean Hansen-Romu, Kichiji Hatanaka, Tomohiro Hayamizu, Takashi Higuchi, Go Ichikawa, Sohei Imajo, Blair Jamieson, Shinsuke Kawasaki, Masaaki Kitaguchi, Wolfgang Klassen, Emma Klemets, Akira Konaka, Elie Korkmaz, Ekaterina Korobkina, Florian Kuchler, Maedeh Lavvaf, Larry Lee, Thomas Lindner, Kirk W. Madison, Yasuhiro Makida, Russell Mammei, Juliette Mammei, Jeffery W. Martin, Mark McCrea, Eric Miller, Kenji Mishima, Takamasa Momose, Takahiro Okamura, Hooi Jin Ong, Ruediger Picker, William D. Ramsay, Wolfgang Schreyer, Hirohiko M. Shimizu, Steve Sidhu, Shawn Stargardter, Isao Tanihata, Sean Vanbergen, Willem T. H. van Oers, Yutaka Watanabe

    Proceedings of the 24th International Spin Symposium (SPIN2021)     2022.12

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    Publishing type:Research paper (international conference proceedings)   Publisher:Journal of the Physical Society of Japan  

    DOI: 10.7566/jpscp.37.020701

  22. Optically Polarized Alkali Metal Cell for Muonic Helium Measurements

    Takashi Ino, Seiso Fukumura, Patrick Strasser, Masaki Fujita, Yoichi Ikeda, Sohtaro Kanda, Masaaki Kitaguchi, Shoichiro Nishimura, Takayuki Oku, Takuya Okudaira, Hirohiko M. Shimizu, Koichiro Shimomura

    Proceedings of the 24th International Spin Symposium (SPIN2021)     2022.12

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    Publishing type:Research paper (international conference proceedings)   Publisher:Journal of the Physical Society of Japan  

    DOI: 10.7566/jpscp.37.021208

  23. Measurement of the transverse asymmetry of γ rays in the 117Sn(n,γ)118Sn reaction Reviewed International journal

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

    Physical Review C   Vol. 106 ( 6 )   2022.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/PhysRevC.106.064601

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevC.106.064601/fulltext

  24. Study on the reusability of fluorescent nuclear track detectors using optical bleaching Reviewed International journal

    Abdul Muneem, Junya Yoshida, Hiroyuki Ekawa, Masahiro Hino, Katsuya Hirota, Go Ichikawa, Ayumi Kasagi, Masaaki Kitaguchi, Satoshi Kodaira, Kenji Mishima, Jameel-Un Nabi, Manami Nakagawa, Michio Sakashita, Norihito Saito, Takehiko R. Saito, Satoshi Wada, Nakahiro Yasuda

    Radiation Measurements   Vol. 158   page: 106863 - 106863   2022.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.radmeas.2022.106863

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  25. Displacement-noise-free neutron interferometer for gravitational wave detection using a single Mach-Zehnder configuration Reviewed International journal

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

    PHYSICS LETTERS A   Vol. 441   2022.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.physleta.2022.128150

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  26. A novel nuclear emulsion detector for measurement of quantum states of ultracold neutrons in the Earth's gravitational field Reviewed International coauthorship International journal

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

    Journal of Instrumentation   Vol. 17 ( 7 ) page: P07014 - P07014   2022.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IOP Publishing  

    Abstract

    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 <sup>10</sup>B<sub>4</sub>C, and a layer of fine-grained nuclear emulsion.Its resolution was estimated to be less than 100 nm by fitting tracks of either <sup>7</sup>Li nuclei or α-particles, which were created when neutrons interacted with the <sup>10</sup>B<sub>4</sub>C 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 than0.56(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

    Web of Science

    Other Link: https://iopscience.iop.org/article/10.1088/1748-0221/17/07/P07014/pdf

  27. Neutron displacement noise-free interferometer for gravitational-wave detection Reviewed International journal

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

    PHYSICAL REVIEW D   Vol. 105 ( 12 )   2022.6

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    DOI: 10.1103/PhysRevD.105.124017

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  28. Angular distribution of γ rays from the p -wave resonance of Sn 118 Reviewed International coauthorship International journal

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

    Physical Review C   Vol. 105 ( 5 )   2022.5

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    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

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    Scopus

  29. Proposal for new measurements of muonic helium hyperfine structure at J-PARC

    Seiso Fukumura, Patrick Strasser, Takashi Ino, Takayuki Oku, Takuya Okudaira, Sohtaro Kanda, Masaaki Kitaguchi, Koichiro Shimomura, Hirohiko M. Shimizu, Hiroyuki A. Torii, Shoichiro Nishimura

    EPJ Web of Conferences   Vol. 262   page: 01012 - 01012   2022.4

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    Publishing type:Research paper (scientific journal)   Publisher:EDP Sciences  

    The measurement of the ground state hyperfine structure of muonic helium has the potential to improve the precision of the mass of the negative muon by a factor of 50 or more. The mass of the negative muon is very important because it enables us to test the CPT theorem by comparison with positive muon mass. We aim to measure the hyperfine structure of muonic helium with a precision 1000 times higher than previous experiments [1,2] using the highintensity muon beam at J-PARC and have already obtained results better than the current precision in zero-field measurements in a test experiment in March 2021. To further improve the precision, we plan to measure in a high magnetic field and incorporate a technique that can produce highly polarized muonic helium atom [3]. In this paper, we will report on these developments.

    DOI: 10.1051/epjconf/202226201012

  30. Improvement of systematic uncertainties for the neutron lifetime experiment at J-PARC

    Takanori Mogi, Takuro Hasegawa, Katsuya Hirota, Go Ichikawa, Sei Ieki, Takashi Ino, Yoshihisa Iwashita, Shogo Kajiwara, Yu Kato, Masaaki Kitaguchi, Ryunosuke Kitahara, Jun Koga, So Makise, Shun Matsuzaki, Kenji Mishima, Koki Morikawa, Naoki NAGAKURA, Hiroki Okabe, Hidetoshi Otono, Yoshichika Seki, Daiichiro Sekiba, Tatsushi Shima, Haruki Shimizu, Hirohiko M. Shimizu, Yuki Sugisawa, Naoyuki Sumi, Hirochika Sumino, Tomohiko Tanabe, Tatsuhiko TOMITA, Hideaki Uehara, Takahito Yamada, Satoru Yamashita, Kodai Yano, Tamaki Yoshioka

    Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)     2022.3

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    Publishing type:Research paper (international conference proceedings)   Publisher:Sissa Medialab  

    DOI: 10.22323/1.380.0458

  31. Neutron lifetime experiment with pulsed cold neutrons at J-PARC

    Go Ichikawa, Yasuhiro Fuwa, Takuro Hasegawa, Masahiro Hino, Katsuya Hirota, Takashi Ino, Yoshihisa Iwashita, Masaaki Kitaguchi, Jun Koga, Shun Matsuzaki, Kenji Mishima, Takanori Mogi, Koki Morikawa, Hiroki Okabe, Hidetoshi Otono, Yoshichika Seki, Daiichiro Sekiba, Tatsushi Shima, Haruki Shimizu, Hirohiko M. Shimizu, Naoyuki Sumi, Hirochika Sumino, Satoru Yamashita, Kodai Yano, Tamaki Yoshioka

    Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)     2022.3

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    Publishing type:Research paper (international conference proceedings)   Publisher:Sissa Medialab  

    DOI: 10.22323/1.380.0457

  32. Erratum: Transverse asymmetry of γ rays from neutron-induced compound states of <sup>140</sup>La (Physical Review C (2020) 101 (064624) DOI: 10.1103/PhysRevC.101.064624) Reviewed International coauthorship International journal

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

    Physical Review C   Vol. 105 ( 3 )   2022.3

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    We correct the sign of thetraverse asymmetry ALR in our previous paper The transverse asymmetry is derived from the correlation term snk? , where sn and k? are polarization of incident neutrons and momentum of emitted ? rays, respectively. The neutron polarization direction was determined using two measurements: (1) the measurement of the polarization direction of the circularly polarized laser which is used to polarize the 3He nuclei of the neutron polarizer, and (2) the measurement of the neutron polarization direction as it passes through the 3He neutron polarizer using a magnetic supermirror. However, in (1), the relation between the direction of the circular polarization and the spin of photons was misevaluated. Additionally, in (2), the relation between the neutron polarization direction reflected by the magnetic supermirror and the magnetic field applied to the magnetic supermirror was also misevaluated. Upon reevaluation we have deduced that the neutron polarization direction during the experiment was opposite to what was previously reported, and, hence, the sign of ALR should be reversed. As supporting evidence, the direction of the circular polarization of our laser system was obtained by measuring the electric paramagnetic resonance signal of Rb during laser pumping. The neutron polarization direction was also determined from the measurement of the parity violation at the 0.74-eV p-wave resonance of 139 La + n using our 3He neutron polarizer. These results also support that the neutron polarization direction was opposite to what was previously reported. Consequently, the transverse asymmetries for ? rays emitted in the transition from the 0.74-eV p-wave resonance to the ground state and inclusive ? rays are newly obtained as Agnd LR = - 0.60 ± 0.19 and Ainc LR = - 0.0045 ± 0.0080 , respectively. Similarly, Figs. 9, 11, 13, and 15 in the original paper should be replaced as Figs. 9, 11, 13, and 15 in this Erratum, respectively. The corrections do not affect results and conclusions of the original article. (Figure Presented).

    DOI: 10.1103/PhysRevC.105.039901

    Scopus

  33. Measurement of nuclear spin relaxation time in lanthanum aluminate for development of polarized lanthanum target Reviewed International journal

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

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 1020   2021.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.nima.2021.165845

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  34. Pendellösung interferometry probes the neutron charge radius, lattice dynamics, and fifth forces Reviewed International coauthorship International journal

    Benjamin Heacock, Takuhiro Fujiie, Robert W. Haun, Albert Henins, Katsuya Hirota, Takuya Hosobata, Michael G. Huber, Masaaki Kitaguchi, Dmitry A. Pushin, Hirohiko Shimizu, Masahiro Takeda, Robert Valdillez, Yutaka Yamagata, Albert R. Young

    Science   Vol. 373 ( 6560 ) page: 1239 - +   2021.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Association for the Advancement of Science ({AAAS})  

    DOI: 10.1126/science.abc2794

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    PubMed

  35. Energy-dependent angular distribution of individual gamma rays in the La-139(n, gamma) La-140* reaction Reviewed International coauthorship International journal

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

    PHYSICAL REVIEW C   Vol. 104 ( 1 )   2021.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

    Neutron energy-dependent angular distributions were observed for individual gamma rays from the 0.74 eV p-wave resonance of La-139+n to several lower excited states of La-140. The gamma-ray signals were analyzed in a two-dimensional histogram of the gamma-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 gamma 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

    Web of Science

  36. New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the HIBEAM/NNBAR experiment at the European Spallation Source Reviewed International coauthorship International journal

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

    Journal of Physics G: Nuclear and Particle Physics   Vol. 48 ( 7 ) page: 070501 - 070501   2021.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IOP Publishing  

    Abstract

    The violation of baryon number, $\mathcal{B}$ , 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 ( $n\to \bar{n}$ ) via mixing, neutron–antineutron oscillation via regeneration from a sterile neutron state ( $n\to \left[{n}^{\prime },{\bar{n } }^{\prime }\right]\to \bar{n}$ ), and neutron disappearance (n → n′); the effective ${\Delta}\mathcal{B}=0$ process of neutron regeneration ( $n\to \left[{n}^{\prime },{\bar{n } }^{\prime }\right]\to n$ ) 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

    Web of Science

    Other Link: https://iopscience.iop.org/article/10.1088/1361-6471/abf429/pdf

  37. Development of Pulsed Neutron Interferometer Reviewed International journal

    Nana Yamamoto, Masaaki Kitaguchi, Hirohiko M Shimizu, Yoshichika Seki, Kenji Mishima

    Proceedings of the 3rd J-PARC Symposium (J-PARC2019)     2021.3

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Journal of the Physical Society of Japan  

    DOI: 10.7566/jpscp.33.011119

  38. Measurement of Angular Distributions of \(\gamma \)-rays from 139La+n to Excited States of 140La

    Takuya Okudaira, Shunsuke Endo, Hiroyuki Fujioka, Katsuya Hirota, Kohei Ishizaki, Atsushi Kimura, Masaaki Kitaguchi, Jun Koga, So Makise, Yudai Niinomi, Kenji Sakai, Tatsushi Shima, Hirohiko M. Shimizu, Shusuke Takada, Yuika Tani, Tomoki Yamamoto, Hiromoto Yoshikawa, Tamaki Yoshioka

    Proceedings of the 3rd J-PARC Symposium (J-PARC2019)     2021.3

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    Publishing type:Research paper (international conference proceedings)   Publisher:Journal of the Physical Society of Japan  

    DOI: 10.7566/jpscp.33.011121

  39. Precise Neutron Lifetime Measurement Using Pulsed Neutron Beams at J-PARC

    N. Sumi, K. Hirota, G. Ichikawa, T. Ino, Y. Iwashita, S. Kajiwara, Y. Kato, M. Kitaguchi, K. Mishima, K. Morikawa, T. Mogi, H. Oide, H. Okabe, H. Otono, T. Shima, H. M. Shimizu, Y. Sugisawa, T. Tanabe, S. Yamashita, K. Yano, T. Yoshioka

    Proceedings of the 3rd J-PARC Symposium (J-PARC2019)     2021.3

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    Publishing type:Research paper (international conference proceedings)   Publisher:Journal of the Physical Society of Japan  

    DOI: 10.7566/jpscp.33.011056

  40. Study of \(\gamma \)-ray from 4.53 eV p-wave Resonance of 111Cd Using Compound Nuclear Reaction

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

    Proceedings of the 3rd J-PARC Symposium (J-PARC2019)     2021.3

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    Publishing type:Research paper (international conference proceedings)   Publisher:Journal of the Physical Society of Japan  

    DOI: 10.7566/jpscp.33.011138

  41. Study for the Experimental Sensitivity of T-violation Search in Compound Nuclear Reaction of 117Sn

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

    Proceedings of the 3rd J-PARC Symposium (J-PARC2019)     2021.3

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    Publishing type:Research paper (international conference proceedings)   Publisher:Journal of the Physical Society of Japan  

    DOI: 10.7566/jpscp.33.011137

  42. S-wave Resonance Analysis of 139La and 109Ag in the Compound Nuclear Process Towards T-violation Search

    Hiromoto Yoshikawa, Shunsuke Endo, Hiroyuki Fujioka, Katsuya Hirota, Kohei Ishizaki, Atsushi Kimura, Masaaki Kitaguchi, Jun Koga, So Makise, Yudai Niinomi, Takuya Okudaira, Kenji Sakai, Tatsushi Shima, Hirohiko M. Shimizu, Shusuke Takada, Yuika Tani, Tomoki Yamamoto, Tamaki Yoshioka

    Proceedings of the 3rd J-PARC Symposium (J-PARC2019)     2021.3

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    Publishing type:Research paper (international conference proceedings)   Publisher:Journal of the Physical Society of Japan  

    DOI: 10.7566/jpscp.33.011136

  43. Proof-of-principle Experiment for the Study of a New Intermediate-range Interaction Using Coherent Neutron Scattering

    Masayuki Hiromoto, Taichi Hori, Ryota Kondo, Shuhei Hara, Tatsushi Shima, Rintaro Nakabe, Noriko Oi, Hirohiko M. Shimizu, Katsuya Hirota, Masaaki Kitaguchi, Christopher C. Haddock, William M. Snow, Tamaki Yoshioka, Kenji Mishima, Takashi Ino

    Proceedings of the 3rd J-PARC Symposium (J-PARC2019)     2021.3

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    Publishing type:Research paper (international conference proceedings)   Publisher:Journal of the Physical Society of Japan  

    DOI: 10.7566/jpscp.33.011118

  44. Measurement of γ rays from <sup>6</sup>LiF tile as an inner wall of a neutron-decay detector Reviewed International journal

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

    Journal of Instrumentation   Vol. 16 ( 2 )   2021.2

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    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

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    Scopus

  45. Neutron Imaging Using a Fine-Grained Nuclear Emulsion

    Katsuya Hirota, Tomoko Ariga, Masahiro Hino, Go Ichikawa, Shinsuke Kawasaki, Masaaki Kitaguchi, Kenji Mishima, Naoto Muto, Naotaka Naganawa, Hirohiko M. Shimizu

    Journal of Imaging   Vol. 7 ( 1 ) page: 4 - 4   2021.1

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    Publishing type:Research paper (scientific journal)   Publisher:MDPI AG  

    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

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    PubMed

  46. Neutron lifetime measurement with pulsed cold neutrons Reviewed

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

    Progress of Theoretical and Experimental Physics   Vol. 2020 ( 12 )   2020.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    <title>Abstract</title>
    The neutron lifetime has been measured by comparing the decay rate with the reaction rate of $^3$He 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 $^3$He(n,p)$^3$H reaction using a gas chamber, the working gas of which contains diluted $^3$He. The measured neutron lifetime was $898\,\pm\,10\,_{\rm stat}\,^{+15}_{-18}\,_{\rm sys}\,$s.

    DOI: 10.1093/ptep/ptaa169

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    Other Link: http://academic.oup.com/ptep/article-pdf/2020/12/123C02/35931162/ptaa169.pdf

  47. Development and application of a 3He Neutron Spin Filter at J-PARC Reviewed International journal

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

    Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   Vol. 977   page: 164301 - 164301   2020.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.nima.2020.164301

    Web of Science

  48. Transverse asymmetry of γ rays from neutron-induced compound states of La140 Reviewed International journal

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

    Physical Review C   Vol. 101 ( 6 )   2020.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    DOI: 10.1103/PhysRevC.101.064624

    Web of Science

    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevC.101.064624/fulltext

  49. An experimental setup for creating and imaging <sup>4</sup> He 2∗ excimer cluster tracers in superfluid helium-4 via neutron-<sup>3</sup>He absorption reaction Reviewed International journal

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

    Review of Scientific Instruments   Vol. 91 ( 3 )   2020.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    © 2020 Author(s). For the purpose of future visualization of the flow field in superfluid helium-4, clusters of the triplet state excimer 4He2* are generated along the micro-scale recoil tracks of the neutron-absorption reaction n + 3He → 3T + p. This reaction is induced by neutron irradiation of the 3He 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 4He2* 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 4He2* 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

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  50. Measurement and analysis reports on angular dependence of γ rays emitted from <sup>111</sup>Cd specific p-wave resonance for compound nuclear reaction

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

    Meeting Abstracts of the Physical Society of Japan   Vol. 75.1   page: 308 - 308   2020

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    DOI: 10.11316/jpsgaiyo.75.1.0_308

  51. Design and Construction of an Imaging beamline at the Nagoya University Neutron Source Reviewed International journal

    Katsuya Hirota, Shogo Awano, Takuhiro Fujiie, Seiso Fukumura, Mayu Hishida, Go Ichikawa, Sohei Imajo, Ikuya Itoh, Yoshihisa Iwashita, Masaaki Kitaguchi, Yoshiaki Kiyanagi, Yasutoshi Kuriyama, Koki Morikawa, Yu-dai Niinomi, Hirohiko M. Shimizu, Kazuki Tsuchida, Yusuke Tsuchikwa, Yukio Tsurita, Akira Uritani, Kenichi Watanabe, Yutaka Yamagata, Nana Yamamoto, Atsushi Yamazaki, Sachiko Yoshihashi, Tamaki Yoshioka

    EPJ Web of Conferences   Vol. 231   page: 05002 - 05002   2020

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    The Nagoya University Accelerator driven Neutron Source (NUANS) is constructed at the main campus of the Nagoya University. The electrostatic accelerator is used with the maximum proton energy and intensity of 2.8MeV, 15mA(42kW) respectively. Two neutron beamlines are designed at NUANS. The BL1 is dedicated to BNCT development. The BL2 is designed for research and development for neutron devices and neutron imaging. The neutrons used for the BL2 are generated by using the (p, n) reaction from a thin beryllium target. We constructed a compact target station for the BL2 and measured the neutron transmission image.

    DOI: 10.1051/epjconf/202023105002

  52. Ultracold Neutron Time Focusing Experiment and Performance Evaluation of an Improved UCN Rebuncher at J-PARC/MLF Reviewed

    S. Imajo, Y. Iwashita, K. Mishima, M. Kitaguchi, H. M. Shimizu, T. Ino, S. Yamashita, K. Hirota, F. Goto, Y. Fuwa, R. Katayama

    Proceedings of The 3rd J-PARC Symposium (in press)     2020

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  53. Measurement of the total neutron-scattering cross-section ratios of noble gases of natural isotopic composition using a pulsed neutron beam Reviewed International coauthorship International journal

    Haddock, CC; Hiromoto, M; Hirota, K; Ino, T; Kitaguchi, M; Mishima, K; Oi, N; Shima, T; Shimizu, HM; Snow, WM; Yoshioka, T

    PHYSICAL REVIEW C   Vol. 100 ( 6 )   2019.12

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    DOI: 10.1103/PhysRevC.100.064002

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  54. Measurement of the angular distribution of γ-rays after neutron capture by 139La for a T-violation search Reviewed

    Takuya Okudaira, Hirohiko M. Shimizu, Masaaki Kitaguchi, Katsuya Hirota, Christopher C. Haddock, Ikuya Ito, Tomoki Yamamoto, Shunsuke Endo, Kohei Ishizaki, Takumi Sato, Shusuke Takada, Jun Koga, Tamaki Yoshioka, Takashi Ino, Kouichiro Asahi, Takamasa Momose, Takahiro Iwata, Takayuki Oku, Kenji Sakai, Atsushi Kimura, Taro Nakao, Masanori Hino, Tatsushi Shima, Yutaka Yamagata

    EPJ Web of Conferences     2019.12

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    DOI: 10.1051/epjconf/201921909001

  55. Measurement and alleviation of subsurface damage in a thick-crystal neutron interferometer Reviewed International coauthorship International journal

    Heacock, B., Haun, R., Hirota, K., Hosobata, T., Huber, M.G., Jamer, M.E., Kitaguchi, M., Pushin, D.A., Shimizu, H., Taminiau, I., Yamagata, Y., Yamamotod, T., Younga, A.R.

    Acta Crystallographica Section A: Foundations and Advances   Vol. 75   page: 833 - 841   2019.11

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    DOI: 10.1107/S2053273319011604

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  56. Improved determination of thermal cross section of 14N (n,p) 14C for the neutron lifetime measurement at J-PARC Reviewed International journal

    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   Vol. 2019 ( 9 ) page: 093C01   2019.9

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    DOI: 10.1093/ptep/ptz096

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  57. Generation of <sup>4</sup> He 2∗ Clusters via Neutron- <sup>3</sup> He Absorption Reaction Toward Visualization of Full Velocity Field in Quantum Turbulence Reviewed International journal

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

    Journal of Low Temperature Physics   Vol. 196 ( 1-2 ) page: 275 - 282   2019.7

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    © 2018, Springer Science+Business Media, LLC, part of Springer Nature. For flow visualization study of quantum turbulence in superfluid 4He, 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 3He impurities in 4He 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-3He absorption reactions.

    DOI: 10.1007/s10909-018-02112-3

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  58. First ultracold neutrons produced at TRIUMF Reviewed International coauthorship International journal

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

    Physical Review C   Vol. 99 ( 2 )   2019.2

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    © 2019 American Physical Society. 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

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  59. Pendellosung interferometry by using pulsed neutrons (vol 908, pg 78, 2018)

    Itoh, S; Nakaji, M; Uchida, Y; Kitaguchi, M; Shimizu, HM

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 918   page: 99 - 99   2019.2

  60. New precise measurements of muonium hyperfine structure at J-PARC MUSE

    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)   Vol. 198   2019

  61. Measurement of γ ray from 7.0 eV P-wave of <sup>113</sup>Cd using compound nuclear reaction for T-violation search

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

    Meeting Abstracts of the Physical Society of Japan   Vol. 74.1   page: 273 - 273   2019

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    DOI: 10.11316/jpsgaiyo.74.1.0_273

  62. A search for deviations from the inverse square law of gravity at nm range using a pulsed neutron beam Reviewed International coauthorship International journal

    Christopher Haddock, Katsuya Hirota, Takashi Ino, Masaaki Kitaguchi, Kenji Mishima, Noriko Oi, Tatsushi Shima, Hirohiko Shimizu, W. Michael Snow, Tamaki Yoshioka

    EPJ Web of Conferences   Vol. 219   page: 05002 - 05002   2019

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    Recently published results and ongoing experimental efforts to search for deviations from the inverse square law of gravity at the nanometer length scale using slow neutron scattering from the noble gases are discussed. Using the pulsed slow neutron beamline BL05 at the Materials and Life Sciences Facility at J-PARC, we measured the neutron momentum transfer (q) dependence of the differential scattering cross section for the noble gases He, Ne, Ar, Kr, and Xe. By comparing to the distributions obtained using pseudo-experimental Monte Carlo simulations and forming ratios between Xe and He, we placed an upper bound on the strength of a new interaction as a function of interaction length λ which improved upon previous results in the region λ &lt; 0.1 nm, and remains competitive in the larger λ region. Additionally we describe how we are using our technique to extract relative values of the total neutron scattering cross sections of the noble gases, as well as how we plan to measure the neutron-electron scattering length using the NOVA instrument on BL21 at J-PARC.

    DOI: 10.1051/epjconf/201921905002

  63. New project for precise neutron lifetime measurement at J-PARC

    Naoki Nagakura, Katsuya Hirota, Sei Ieki, Takashi Ino, Yoshihisa Iwashita, Masaaki Kitaguchi, Ryunosuke Kitahara, Jun Koga, Kenji Mishima, Aya Morishita, Yusuke Nakano, Hideyuki Oide, Hiroki Okabe, Hidetoshi Otono, Yoshichika Seki, Daiichiro Sekiba, Tatsushi Shima, Hirohiko Shimizu, Naoyuki Sumi, Hirochika Sumino, Kaoru Taketani, Tatsuhiko Tomita, Hideaki Uehara, Takahito Yamada, Satoru Yamashita, Mami Yokohashi, Tamaki Yoshioka

    EPJ Web of Conferences   Vol. 219   page: 03003 - 03003   2019

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    The decay lifetime of free neutrons (∼880 s) is an important parameter of the weak interaction and for Big Bang Nucleosynthesis. However, results of measurements currently show discrepancies depending on the method used. As most experiments nowadays employ ultra cold neutrons, we have developed a new cold-beam experiment which we perform at the Japan Proton Accelerator Research Complex. As a special feature, a polarized neutron beam is bunched by a spin flip chopper. A time projection chamber operated with He and CO<sub>2</sub> gas, including a well-controlled amount of <sup>3</sup>He, is used for detection of the beta-decays and simultaneous determination of the beam intensity. Using the data between 2014 and 2016, we evaluated our first, preliminary result of the neutron lifetime as 896 ± 10(stat.) <sub>−10</sub><sup>+14</sup>(sys.) s. We plan several upgrades to achieve our precision goal of 1 s.

    DOI: 10.1051/epjconf/201921903003

  64. Measurement of the angular distribution of prompt gamma-rays emitted in the 117Sn(n, γ) reaction for a T-violation search Reviewed

    Jun Koga, Shusuke Takada, Tamaki Yoshioka, Hirohiko M. Shimizu, Katsuya Hirota, Norio Oi, Tomoki Yamamoto, Ikuya Ito, Kohei Ishizaki, Shunsuke Endo, Takumi Sato, Masaaki Kitaguchi, Christopher C. Haddock, Takuya Okudaira, Kenji Sakai, Atsushi Kimura

    EPJ Web of Conferences   Vol. 219   page: 09004 - 09004   2019

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    <jats:p>It is theoretically suggested that the violation of charge conjugation and parity symmetry (CP-violation) could be enhanced in several compound nuclear reactions. According to the CPT theorem the violation of time-reversal symmetry (T-violation) would be enhanced too. The experimental sensitivity to find a T-violating effect in neutron-induced compound nuclear reactions depends on the value of a spin factor κ(<jats:italic>J</jats:italic>), which is a parameter specific for each nuclide. It can be determined from the angular dependence of γ-ray emission in (n,γ) reactions induced near a p-wave resonance. In this paper, the measurement result and the analysis status of experiments using the target nucleus <jats:sup>117</jats:sup>Sn are reported.</jats:p>

    DOI: 10.1051/epjconf/201921909004

  65. Measurement of P-Violation in 139La(n,γ)140La – a first step towards a T-Violation search Reviewed

    Tomoki Yamamoto, Hirohiko M. Shimizu, Masaaki Kitaguchi, Katsuya Hirota, Christopher C. Haddock, Shunsuke Endo, Kohei Ishizaki, Takumi Sato, Shusuke Takada, Jun Koga, Tamaki Yoshioka, Takashi Ino, Koichiro Asahi, Takamasa Momose, Takahiro Iwata, Kenji Sakai, Takuya Okudaira, Takayuki Oku, Atsushi Kimura, Masahiro Hino, Tatsushi Shima, Yutaka Yamagata

    EPJ Web of Conferences   Vol. 219   page: 09002 - 09002   2019

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    <jats:p>We performed a polarized neutron transmission asymmetry measurement utilizing the <jats:sup>139</jats:sup>La(<jats:italic>n</jats:italic>,γ)<jats:sup>140</jats:sup>La reaction. This measurement involved the use of a recently developed <jats:sup>3</jats:sup>He spin filter mounted on the J-PARC MLF beam line number 4 (BL04). The resulting value of the longitudinal asymmetry <jats:italic>A</jats:italic><jats:sub><jats:italic>L</jats:italic></jats:sub> = (11.7 ± 1.1)% was found to be in good agreement with existing values in the literature suggesting that the method by which we polarize the neutron beam is not a significant source of uncertainty. This preliminary work represents a first step toward future measurements of the angular correlation in (<jats:italic>n̅</jats:italic>,<jats:italic>Υ</jats:italic>) reactions necessary in the search for enhanced T-Violation in compound nuclei.</jats:p>

    DOI: 10.1051/epjconf/201921909002

  66. Development of the neutron polarizer for the T-violation search using compound nuclei Reviewed International journal

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

    Proceedings of Science   Vol. 356   2019

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    © Copyright owned by the author(s). The fundamental parity violation is enhanced by 106 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 3He is ongoing at J-PARC in JAEA. Recently, a clean vacuum system to fabricate 3He spin filters was constructed, and several 3He spin filters were fabricated. The current status of the development of the 3He spin filter was reported.

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  67. Verification of the compound nuclear model for T-violation search

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

    Proceedings of Science   Vol. 356   2019

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    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

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  68. Development of New Neutron Mirrors for Measuring the Neutron Electric Dipole Moment Reviewed International journal

    Ryo Katayama, Kenji Mishima, Satoru Yamashita, Masaaki Kitaguchi, Tamaki Yoshioka, Yoshichika Seki, Masahiko Mitsuhashi, Masahiko Sugihara, Masahiro Hino, Eiichiro Watanabe, Daiju Tsuya, Mikiko Saito, Norifumi L. Yamada

    Proceedings of the International Conference on Neutron Optics (NOP2017)     2018.11

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    DOI: 10.7566/jpscp.22.011009

  69. A cold/ultracold neutron detector using fine-grained nuclear emulsion with spatial resolution less than 100 nm Reviewed International journal

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

    The European Physical Journal C   Vol. 78 ( 11 )   2018.11

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    DOI: 10.1140/epjc/s10052-018-6395-7

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  70. Pendellosung interferometry by using pulsed neutrons Reviewed

    Itoh Shigeyasu, Nakaji Masaya, Uchida Yuya, Kitaguchi Masaaki, Shimizu Hirohiko M

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 908   page: 78 - 81   2018.11

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    DOI: 10.1016/j.nima.2018.08.043

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  71. A Search for Possible Deviations from Newtonian Gravity at the nm Length Scale Using Neutron-Noble Gas Scattering Reviewed International coauthorship International journal

    Noriko Oi, Hirohiko M. Shimizu, Katsuya Hirota, Masaaki Kitaguchi, Christopher C. Haddock, William M. Snow, Tamaki Yoshioka, Kenji Mishima, Takashi Ino, Tatsushi Shima

    JPS Conference Proceedings     2018.11

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  72. Measurement of Angular Distributions in 139La(n,γ) Reaction for T violation Search Reviewed

    T. Okudaira, H, M. Shimizu, M. Kitaguchi, K. Hirota, C. C. Haddock, N. Oi, I. Ito, T. Yamamoto, S. Endo, S. Takada, J. Koga, T. Yoshioka, T. Ino, K. Asahi, T. Momose, T. Iwata, K. Sakai, T. Oku, A. Kimura, M. Hino, T. Shima, Y. Yamagata

    JPS Conference Proceedings     2018.11

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    DOI: 10.7566/JPSCP.22.011041

  73. Measurement of Angular Distributions in 139La(n,gamma) Reaction for T Violation Search Reviewed

    T. Okudaira, H.M. Shimizu, M. Kitaguchi, K. Hirota, C.C. Haddock, N. Oi, I. Ito, T. Yamamoto, S. Endo, S. Takada, J. Koga, T. Yoshioka, T. Ino, K. Asahi, T. Momose, T. Iwata, K. Sakai, T. Oku, A. Kimura, M. Hino, T. Shima, Y. Yamagata

    JPS Conference Proceedings     2018.11

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  74. Measurement of (n,gamma) Reaction of 117Sn for T-Violation Search by Using Compound Nucleus Reviewed

    J. Koga, S. Takada, T. Yoshioka, H.M. Shimizu, K. Hirota, T. Okudaira, N. Oi, I. Ito, T. Yamamoto, S. Endo, C.C. Haddock, M. Kitaguchi, A. Kimura, K. Sakai, T. Ino, K. Asahi, T. Momose, T. Iwata, M. Hino, T. Shima, Y. Yamagata

    JPS Conference Proceedings     2018.11

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  75. Fundamental Physics Using High-Performance Optics Reviewed International coauthorship International journal

    Masaaki Kitaguchi, Koichiro Asahi, Shunsuke Endo, Christopher C. Haddock, Masahiro Hino, Katsuya Hirota, Takashi Ino, Ikuya Ito, Takahiro Iwata, Jun Koga, Yoshiyuki Miyachi, Takamasa Momose, Noriko Oi, Takuya Okudaira, Kenji Sakai, Tatsushi Shima, Hirohiko M. Shimizu, Shusuke Takada, Yutaka Yamagata, Tomoki Yamamoto, Tamaki Yoshioka

    JPS Conference Proceedings     2018.11

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  76. Development of a Neutron Spin Filter for a T Violation Search in Compound Nuclei Reviewed International coauthorship International journal

    T. Yamamoto, H.M. Shimizu, M. Kitaguchi, K. Hirota, T. Okudaira, C.C. Haddock, N. Oi, I. Ito, S. Endo, S. Takada, J. Koga, T. Yoshioka, T. Ino, K. Asahi, T. Momose, T. Iwata, K. Sakai, T. Oku, A. Kimura, M. Hino, T. Shima, Y. Yamagata

    JPS Conference Proceedings     2018.11

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  77. Angular distribution of γ rays from neutron-induced compound states of la 140 Reviewed

    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   Vol. 97 ( 3 )   2018.3

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    © 2018 American Physical Society. 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

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  78. Search for deviations from the inverse square law of gravity at nm range using a pulsed neutron beam Reviewed

    Christopher C. Haddock, Noriko Oi, Katsuya Hirota, Takashi Ino, Masaaki Kitaguchi, Satoru Matsumoto, Kenji Mishima, Tatsushi Shima, Hirohiko M. Shimizu, W. Michael Snow, Tamaki Yoshioka

    Physical Review D   Vol. 97 ( 6 )   2018.3

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    © 2018 American Physical Society. 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

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  79. 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 Reviewed

    S. Takada, T. Okudaira, F. Goto, K. Hirota, A. Kimura, M. Kitaguchi, J. Koga, T. Nakao, K. Sakai, H. M. Shimizu, T. Yamamoto, T. Yoshioka

    Journal of Instrumentation   Vol. 13 ( 2 )   2018.2

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    © 2018 IOP Publishing Ltd and Sissa Medialab. 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

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  80. Ultracold Neutron Time Focusing Experiment with an Improved UCN Rebuncher at J-PARC/MLF Reviewed

    S. Imajo, Y. Iwashita, K. Mishima, M. Kitaguchi, H. M. Shimizu, T. Ino, S. Yamashita, K. Hirota, F. Goto, Y. Fuwa, R. Katayama

    JPS Conference Proceedings   Vol. 22   2018

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    DOI: 10.7566/JPSCP.22.011038

  81. The International Conference on Neutron Optics (NOP2017) in Nara Reviewed

    Yoshiaki Kiyanagi, Kazuhisa Kakurai, Hirohiko Shimizu, Masaaki Kitaguchi, Takayuki Oku

    Neutron News   Vol. 28 ( 4 ) page: 18 - 20   2017.10

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    DOI: 10.1080/10448632.2017.1378038

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  82. Towards a high-resolution TOF-MIEZE spectrometer with very cold neutrons Reviewed

    T. Oda, M. Hino, M. Kitaguchi, H. Filter, P. Geltenbort, Y. Kawabata

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 860   page: 35 - 41   2017.7

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    We report the first experimental test of TOF-MIEZE technique using very cold neutrons (VCNs) towards high-resolution quasi-elastic neutron scattering spectroscopy. TOF-MIEZE is a type of neutron resonance spin echo spectroscopy with a combination of the time-of-flight (TOF) method and modulation of intensity by zero effort (MIEZE). A compact MIEZE instrument was constructed at the VCN beam port at the High Flux Reactor at the Institut Laue Langevin. By accumulating individual oscillations of raw data, we observed a TOF-MIEZE signal with an effective frequency of 50 kHz in a wavelength band of 4-6 nm. The signal contrasts were 0.59 +/- 0.04 and 0.29 +/- 0.03 for wavelengths of 4 nm and 6 nm, respectively. The Fourier time was estimated to be 70 ns with 6 nm VCNs in the experimental set-up. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2017.03.014

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    Other Link: http://orcid.org/0000-0002-0918-4382

  83. Concentration of the velocity distribution of pulsed neutron beams Reviewed

    Masaaki Kitaguchi, Yoshihisa Iwashita, Hirohiko M. Shimizu

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   Vol. 2017 ( 4 )   2017.4

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    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 time-of-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

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  84. Measurement of neutron scattering from noble gas to search for a short-range unknown force Reviewed

    O. I. Noriko, Hirohiko M. Shimizu, Katsuya Hirota, Masaaki Kitaguchi, Christopher C. Haddock, William M. Snow, Tamaki Yoshioka, Satoru Matsumoto, Kenji Mishima, Takashi Ino, Tatsushi Shima

    Proceedings of Science   Vol. 2017-January   2017.1

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    ? Copyright owned by the author(s). 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: 10.22323/1.294.0050

  85. 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

    北口 雅暁, 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, 清水 裕彦, 嶋 達志, 山形 豊, 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, C. Haddock

    日本物理学会講演概要集   Vol. 72   page: 255 - 255   2017.1

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    DOI: 10.11316/jpsgaiyo.72.2.0_255

  86. A neutron detector with submicron spatial resolution using fine-grained nuclear emulsion Reviewed International journal

    N. Naganawa, S. Awano, M. Hino, M. Hirose, K. Hirota, H. Kawahara, M. Kitaguchi, K. Mishima, T. Nagae, H. M. Shimizu, S. Tasaki, A. Umemoto

    NEUTRON IMAGING FOR APPLICATIONS IN INDUSTRY AND SCIENCE   Vol. 88   page: 224 - 230   2017

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    We developed a neutron detector with submicron spatial resolution by incorporating Li-6 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. (C) 2017 The Authors. Published by Elsevier B.V.

    DOI: 10.1016/j.phpro.2017.06.031

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  87. Supermirror neutron guide system for neutron resonance spin echo spectrometers at a pulsed neutron source Reviewed

    Masahiro Hino, Tatsuro Oda, Norifumi L. Yamada, Hitoshi Endo, Hideki Seto, Masaaki Kitaguchi, Masahide Harada, Yuji Kawabata

    JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY   Vol. 54 ( 11 ) page: 1223 - 1232   2017

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    A neutron guide system for neutron resonance spin echo spectrometers has been constructed at BL06 of the Japan Proton Accelerator Research Complex, Materials and Life Science Experimental Facility. The spectrometers consist of two types of neutron spin echo instruments, a modulated intensity by zero effort instrument (MIEZE) and a neutron resonance spin echo instrument (NRSE), to cover a wide energy range for various sample environments. A neutron beam from the moderator is deflected by supermirror neutron guides, split, and separately guided into the MIEZE and NRSE. The characteristic wavelengths of the neutron guide tube for the MIEZE and NRSE are 2.9 and 4.9 angstrom, respectively. The cross sections of the exit of the MIEZE and NRSE guides are 15mmx 50mm and 30mmx 50mm, respectively. The neutronics and shielding design were optimized by using the heavy ion transport code system (PHITS), and the absolute average neutron fluxes at the exits of the MIEZE and NRSE guides are estimated to be 2.7x 10(8) and 6.9x 10(8) n/cm(2)/s/MW, respectively. The measured fluxes of the MIEZE and NRSE neutron guides are 0.56 and 0.95times the calculated values, respectively.

    DOI: 10.1080/00223131.2017.1359699

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  88. Search for CP-violation effects in compound neutron resonance at J-PARC

    Kitaguchi M., Shimizu H. M., Hirota K., Okudaira T., Okada A., Ito I., Yamamoto T., Takada S., Koga J., Yoshioka T., Ino T., Asahi K., Momose T., Iwata T., Sakai K., Kimura A., Hino M., Shima T., Yamagata Y.

    Meeting Abstracts of the Physical Society of Japan   Vol. 72.1   page: 299 - 299   2017

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    DOI: 10.11316/jpsgaiyo.72.1.0_299

  89. Neutron lifetime measurement at J-PARC/BL05: Present status and results

    Mishima,Kenji, Nagakura,Naoki, Oide,Hideyuki, Otono,Hidetoshi, Seki,Yoshichika, Sekiba,Daiichiro, Shima,Tatsushi, Shimizu,Hirohiko M, Sumi,Naoyuki, Sumino,Hirochika, Taketani,Kaoru, Hirota,Katsuya, Tomita,Tatsuhiko, Yamada,Takahito, Yamashita,Satoru, Yokohashi,Mami, Yoshioka,Tamaki, Ieki,Sei, Ino,Takashi, Iwashita,Yoshihisa, Kitaguchi,Masaaki, Kitahara,Ryunosuke, Koga,Jun, Morishita,Aya

    Meeting Abstracts of the Physical Society of Japan   Vol. 72 ( 0 ) page: 75 - 75   2017

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    DOI: 10.11316/jpsgaiyo.72.2.0_75

  90. Neutron lifetime measurement at J-PARC/BL05: Beamline upgrade for high statistical measurements

    Kitahara,Ryunosuke, Nagakura,Naoki, Sumino,Hirochika, Yoshioka,Tamaki, Otono,Hidetoshi, Tomita,Tatsuhiko, Sumi,Naoyuki, Morishita,Aya, Koga,Jun, Oide,Hideyuki, Shima,Tatsushi, Iwashita,Yoshihisa, Mishima,Kenji, Ino,Takashi, Taketani,Kaoru, Seki,Yoshichika, Sekiba,Daiichiro, Shimizu,Hirohiko M, Hirota,Katsuya, Yokohashi,Mami, Kitaguchi,Masaaki, Yamashita,Satoru, Yamada,Takahito, Ieki,Sei

    Meeting Abstracts of the Physical Society of Japan   Vol. 72 ( 0 ) page: 76 - 76   2017

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    DOI: 10.11316/jpsgaiyo.72.2.0_76

  91. Pulsed neutron time-dependent intensity modulation for quasi-elastic neutron scattering spectroscopy Reviewed

    Oda T, Hino M, Kitaguchi M, Geltenbort P, Kawabata Y

    Review of Scientific Instruments   Vol. 87 ( 10 )   2016.10

  92. The MTV experiment: searching for T-violation in polarized Li-8 at TRIUMF Reviewed International coauthorship International journal

    J. Murata, H. Baba, J. A. Behr, F. Goto, S. Inaba, H. Kawamura, M. Kitaguchi, C. D.P. Levy, H. Masuda, Y. Nakaya, K. Ninomiya, J. Onishi, R. Openshaw, M. Pearson, Y. Sakamoto, H. Shimizu, Y. Shimizu, S. Tanaka, Y. Tanaka, R. Tanuma, Y. Totsuka, E. Watanabe, M. Yokohashi

    Hyperfine Interactions   Vol. 237 ( 1 )   2016.8

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    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 8Li β-decay. We aim at reaching precision of 10−4 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

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  93. Neutron-antineutron oscillations: Theoretical status and experimental prospects Reviewed

    D. G. Phillips, W. M. Snow, K. Babul, S. Banerjee, D. V. Baxter, Z. Berezhiani, M. Bergevin, S. Bhattacharya, G. Brooijmans, L. Castellanos, M. -C. Chen, C. E. Coppola, R. Cowsik, J. A. Crabtree, P. Das, E. B. Dees, A. Dolgov, P. D. Ferguson, M. Frost, T. Gabrie, A. Gal, F. Gallmeier, K. Ganezer, E. Golubeva, G. Greene, B. Hartfiel, A. Hawari, L. Heilbronn, C. Johnson, Y. Kamyshkov, B. Kerbikov, M. Kitaguchi, B. Z. Kopeliovich, V. B. Kopeliovich, V. A. Kuzmin, C. -Y. Liu, P. McGaughey, M. Mocko, R. Mohapatra, N. Mokhov, G. Muhrer, H. P. Mumm, L. Okun, R. W. Pattie, 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, S. Striganov, L. W. Townsend, R. Tschirhart, A. Vainshtein, R. Van Kooten, Z. Wang, A. R. Young

    PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS   Vol. 612   page: 1 - 45   2016.2

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    The observation of neutrons turning into antineutrons would constitute a discovery of fundamental importance for particle physics and cosmology. Observing the n-(n) over bar 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 next-generation 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. (C) 2015 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physrep.2015.11.001

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  94. Pulsed ultra-cold neutron production using a Doppler shifter at J-PARC Reviewed

    S. Imajo, K. Mishima, M. Kitaguchi, Y. Iwashita, N. L. Yamada, M. Hino, T. Oda, T. Ino, H. M. Shimizu, S. Yamashita, R. Katayama

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   Vol. 2016 ( 1 )   2016.1

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    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 ms(-1) 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 ms(-1) 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 x 10(2) cps, while that of the true UCNs is 80 cps. The spatial density at production is 1.4 UCN cm(-3). 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

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  95. Possibility of crystal and experimental system for measurement of inner electric field

    Nakaji Masaya, Itoh Shigeyasu, Kitaguchi Masaaki, Shimizu Hirohiko

    Meeting Abstracts of the Physical Society of Japan   Vol. 71   page: 277 - 277   2016

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    DOI: 10.11316/jpsgaiyo.71.2.0_277

  96. The design of the beam line of the Nagoya University Accelerator-driven Neutron Source

    Ito Ikuya, Shimizu Hirohiko, Kitaguchi Masaaki, Hirota Katsuya, Ichikawa Go, Yoshiaki Kiyanagi, Tsuchida Kazuki, Uritani Akira, Yoshihashi Sachiko, Watanabe Kenichi, Yamazaki Jun, Miwata Haruhiko, Yamagata Yutaka, Iwashita Yoshihisa

    Meeting Abstracts of the Physical Society of Japan   Vol. 71   page: 295 - 295   2016

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    DOI: 10.11316/jpsgaiyo.71.2.0_295

  97. Generation of He<sub>2</sub><sup>*</sup> clusters via neutron-<sup>3</sup>He absorption reaction for flow visualization in superfluid <sup>4</sup>He

    Matsushita T., Guo W., Hirota K., Kitaguchi M., Kiyanagi Y., Shimizu H. M., Tsuji Y., Wada N.

    Meeting Abstracts of the Physical Society of Japan   Vol. 71   page: 1543 - 1543   2016

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    DOI: 10.11316/jpsgaiyo.71.2.0_1543

  98. Discrete symmetry tests in neutron-induced compound states Reviewed International coauthorship International journal

    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   Vol. 2016-September   2016

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    Other Link: http://orcid.org/0000-0002-9797-0745

  99. Precise neutron lifetime experiment using pulsed neutron beams at J-PARC Reviewed

    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   Vol. 2016-September   page: 191   2016

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    Other Link: http://orcid.org/0000-0002-4689-6231

  100. Feasibility study of neutron wavelength compressor for edm measurement Reviewed International journal

    Masaaki Kitaguchi, Yoshihisa Iwashita, Hirohiko M. Shimizu

    Proceedings of Science   Vol. 2016-   2016

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    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.

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  101. Measurement of the inner electric field of Bi<sub>12</sub>GeO<sub>20</sub>for the measurement of EDM of a neutron

    Itoh Shigeyasu, Nakaji Masaya, Kitaguchi Masaaki, Shimizu Hirohiko

    Meeting Abstracts of the Physical Society of Japan   Vol. 71   page: 276 - 276   2016

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    DOI: 10.11316/jpsgaiyo.71.2.0_276

  102. Development of time projection chamber for precise neutron lifetime measurement using pulsed cold neutron beams Reviewed

    Y. Arimoto, N. Higashi, Y. Igarashi, Y. Iwashita, T. Ino, R. Katayama, M. Kitaguchi, R. Kitahara, H. Matsumura, K. Mishima, N. Nagakura, H. Oide, H. Otono, R. Sakakibara, T. Shima, H. M. Shimizu, T. Sugino, N. Sumi, H. Sumino, K. Taketani, G. Tanaka, M. Tanaka, K. Tauchi, A. Toyoda, T. Tomita, T. Yamada, S. Yamashita, H. Yokoyama, T. Yoshioka

    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   Vol. 799   page: 187 - 196   2015.11

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    © 2015 Elsevier B.V. All rights reserved. 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

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  103. The ion beam sputtering facility at KURRI: Coatings for advanced neutron optical devices Reviewed

    Masahiro Hino, Tatsuro Oda, Masaaki Kitaguchi, Norifumi L. Yamada, Seiji Tasaki, Yuji Kawabata

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 797   page: 265 - 270   2015.10

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    We describe a film coating facility for the development of multilayer mirrors for use in neutron optical devices that handle slow neutron beams. Recently, we succeeded in fabricating a large neutron supermirror with high reflectivity using an ion beam sputtering system (KUR-IBS), as well as all neutron supermirrors in two neutron guide tubes at BLDG atl-PARC/MLF. We also realized a large flexible selfstanding fn-5 NiC/Ti supermirror and very small d-spacing (d =1.65 rim) multilayer sheets. In this paper, we present an overview of the performance and utility of non-magnetic neutron multilayer mirrors fabricated with the KUR-IBS (C) 2015 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2015.06.046

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  104. Pulsed neutron-beam focusing by modulating a permanent-magnet sextupole lens Reviewed

    Masako Yamada, Yoshihisa Iwashita, Masahiro Ichikawa, Yasuhiro Fuwa, Hiromu Tongu, Hirohiko M. Shimizu, Kenji Mishima, Norifumi L. Yamada, Katsuya Hirota, Yoshie Otake, Yoshichika Seki, Yutaka Yamagata, Masahiro Hino, Masaaki Kitaguchi, Ulf Garbe, Shane J. Kennedy, Wai Tung Lee, Ken H. Andersen, Bruno Guerard, Giuliana Manzin, Peter Geltenbort

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   Vol. 2015 ( 4 )   2015.4

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    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 o15 mm. Three units of a double-ring sextupole with a length of 66 mm are cascaded, resulting in a total length of 198 mm. The dynamic modulation range of the unit-averaged field gradient is 1.06 x 10(4)-5.86 x 10(4) Tm-2. Permanent magnets and newly developed torque-canceling 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 angstrom was the same as that of the source aperture (2 mm 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 1.84 m. 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

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  105. 21aDL-6 Optical System for the Neutron Anti-Neutron Oscillation Search Experiment Using Cold Neutrons

    ICHIKAWA Go, SHIMIZU Hirohiko M., KITAGUCHI Masaaki, NNbar Collaboration

    Meeting Abstracts of the Physical Society of Japan   Vol. 70   page: 66 - 66   2015

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    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    DOI: 10.11316/jpsgaiyo.70.1.0_66

    CiNii Books

  106. Observation of the Spatial Distribution of Gravitationally Bound Quantum States of Ultracold Neutrons and Its Derivation Using the Wigner Function Reviewed

    Ichikawa, G., Komamiya, S., Kamiya, Y., Minami, Y., Tani, M., Geltenbort, P., Yamamura, K., Nagano, M., Sanuki, T., Kawasaki, S., Hino, M., Kitaguchi, M.

    Physical Review Letters   Vol. 112 ( 7 )   2014.2

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    DOI: 10.1103/PhysRevLett.112.071101

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    PubMed

  107. Development of a new neutron mirror made of deuterated Diamond-like carbon Reviewed

    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)   Vol. 528   2014

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    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.

    DOI: 10.1088/1742-6596/528/1/012010

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  108. Development of a simulation for measuring neutron electric dipole moment Reviewed

    Ryo Katayama, Kenji Mishima, Satoru Yamashita, Dai Sakurai, Masaaki Kitaguchi, Tamaki Yoshioka, Yoshichika Seki

    INTERNATIONAL WORKSHOP ON NEUTRON OPTICS AND DETECTORS (NOP&D 2013)   Vol. 528   2014

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    The neutron electric dipole moment (nEDM) is sensitive to new physics beyond the standard model and could prove to be a new source of CP violation. Several experiments are being planned worldwide for its high-precision measurement. The nEDM is measured as the ultracold neutron (UCN) spin precession in a storage bottle under homogeneous electric and magnetic fields. In nEDM measurement, the systematic uncertainties are due to the motion of the UCNs, the geometry of the measurement system, and inhomogeneous electric and magnetic fields. Therefore, it is essential to quantitatively understand these effects in order to reduce them. Geant4UCN is an ideal simulation framework because it can compute the UCN trajectory, evaluate the time evolution of the spin precession due to arbitrary electric and magnetic fields, and define the storage geometry flexibly. We checked how accurately Geant4UCN can calculate the spin precession. We found that because of rounding errors, it cannot simulate it accurately enough for nEDM experiments, assuming homogeneous electric and magnetic fields with strengths of 10 kV/cm and 1 mu T, respectively, and 100 s of storage. In this paper, we report on its discrepancies and describe a solution.

    DOI: 10.1088/1742-6596/528/1/012031

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  109. Production of Ultra Cold Neutrons by a Doppler Shifter with Pulsed Neutrons at J-PARC Reviewed

    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

    INTERNATIONAL WORKSHOP ON NEUTRON OPTICS AND DETECTORS (NOP&D 2013)   Vol. 528   2014

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    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 supermin-ors 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 similar to 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.

    DOI: 10.1088/1742-6596/528/1/012030

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  110. Numerical simulation of BL06 neutron beamline for" VIN ROSE" at J-PARC/MLF Reviewed

    Oda Tatsuro, Kawabata Yuji, Seto Hideki, Hino Masahiro, Kitaguchi Masaaki, Yamada Norifumi L

    Prog. Nucl. Sci. Tech.   Vol. 4   page: 214   2014

  111. The development of a low energy neutron accelerator for rebunching pulsed neutrons

    S. Imajo, Y. Iwashita, H. M. Shimizu, M. Kitaguchi, S. Yamashita, Y. Arimoto, Tamaki Yoshioka, Y. Seki

    5th International Particle Accelerator Conference, IPAC 2014 IPAC 2014 Proceedings of the 5th International Particle Accelerator Conference     page: 751 - 753   2014

  112. Development of two-dimensional multiwire-type neutron detector system with individual line readout and optical signal transmission Reviewed

    K. Toh, T. Nakamura, K. Sakasai, K. Soyama, M. Hino, M. Kitaguchi, H. Yamagishi

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 726   page: 169 - 174   2013.10

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    A multiwire-type two-dimensional neutron detector system with a sensitive area of 128 x 128 mm(2) is developed for use in the Materials and Life Science Experimental Facility at the Japan Proton Accelerator Research Complex. The system can achieve a short response time and high spatial resolution using the individual line readout method. Optical devices have been incorporated in the system for long-distance signal transmission and insulation between a detector head in the neutron shielding and signal processing circuits in the data acquisition room. The detector system exhibits a pulse-pair resolution of 1 mu s, an average spatial resolution of less than 2 mm full width at half-maximum in the sensitive region, and a two-dimensional homogeneity of 8.3% in all pixels. (C) 2013 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2013.05.118

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  113. Current status of BL06 beam line for VIN ROSE at J-PARC/MLF Reviewed

    Masahiro Hino, Tatsuro Oda, Masaaki Kitaguchi, Norifumi L. Yamada, Hidenori Sagehashi, Yuji Kawabata, Hideki Seto

    9TH INTERNATIONAL CONFERENCE ON POLARISED NEUTRONS IN CONDENSED MATTER INVESTIGATIONS   Vol. 42   page: 136 - 141   2013

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    We started to construct new beam line for neutron spin echo spectrometers (VIN ROSE) at BL06 J-PARC/MLF from FY2011. The advantage of MIEZE is flexible sample environment and polarimetry analysis. The key device of NRSE is focusing mirror and high-m polarizing device. Both spectrometers are to use intensity gain of J-PARC and dedicated for small sample size. In this study, we show conceptional design of the VIN ROSE and current status of the BL06 beam line at J-PARC/MLF. (C) 2013 The Authors. Published by Elsevier B.V.

    DOI: 10.1016/j.phpro.2013.03.187

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  114. Numerical simulation of a beam divergence correction for NRSE spectrometer using polygonal 2D-focusing supermirrors Reviewed

    Tatsuro Oda, Masahiro Hino, Masaaki Kitaguchi, Yuji Kawabata

    Physics Procedia   Vol. 42   page: 121 - 124   2013

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    By inserting two-dimensional (2D) elliptical focusing mirrors between each pair of RSFs in neutron resonance spin echo spectrometer, the flight path lengths between the pair of RSFs can be made equal even for any divergent beam. We investigate numerically the feasibility of using polygonal 2D elliptical focusing mirrors as beam correction devices, and we show the relation of the energy resolution and the neutron intensity including effect of gravity. © 2013 The Authors.

    DOI: 10.1016/j.phpro.2013.03.184

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    Scopus

  115. Demonstration of focusing by a neutron accelerator Reviewed

    Yasushi Arimoto, Peter Gertenbort, Sohei Imajo, Yoshihisa Iwashita, Masaaki Kitaguchi, Yoshichika Seki, Hirohiko M. Shimizu, Tamaki Yoshioka

    Physical Review A   Vol. 86   page: 023843   2012.8

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  116. Demonstration of focusing by a neutron accelerator Reviewed

    Arimoto, Y; Gertenbort, P; Imajo, S; Iwashita, Y; Kitaguchi, M; Seki, Y; Shimizu, HM; Yoshioka, T

    PHYSICAL REVIEW A   Vol. 86 ( 2 )   2012.8

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  117. Demonstration of optical thickness measurement using multilayer cold neutron interferometer Reviewed

    Y. Seki, J. Uda, H. Funahashi, M. Kitaguchi, M. Hino, Y. Otake, K. Taketani, H. M. Shimizu

    5TH EUROPEAN CONFERENCE ON NEUTRON SCATTERING   Vol. 340   2012

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    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-mu m-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

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  118. Development of Two-Dimensional Scintillation Detectors for Neutron Spin Echo Spectrometers in J-PARC/MLF Reviewed

    T. Nakamura, M. Katagiri, T. Hosoya, K. Toh, M. Kitaguchi, M. Hino, T. Ebisawa, K. Sakasai, K. Soyama

    2012 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE RECORD (NSS/MIC)     page: 222 - 225   2012

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    A two-dimensional scintillation detector comprising of a single screen of flat neutron-sensitive scintillator with wavelength shifting fibers read out was developed. The detector was designed to meet the requirements for the modulated intensity by zero effort spectrometer (MIEZE) to be installed in the J-PARC/MLF. The ZnS/(B2O3)-B-10 scintillator screen that had 0.2 +/- 0.05 mm in thickness was implemented to the detector to minimize the time parallax within the scintillator. The detector design and the detector performances are presented.

    DOI: 10.1109/NSSMIC.2012.6551098

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  119. Development of longitudinal-gradient magnet for time focusing of ultra-cold neutron with anisotropic inter-pole Reviewed

    Yasushi Arimoto, Yoshihisa Iwashita, Tamaki Yoshioka, Masaaki Kitaguchi, Sohei Imajo, Hirohiko M. Shimizu, Koichiro Asahi, Takashi Ino, Yoshio Kamiya, Kenji Mishima, Suguru Muto, Kenji Sakai, Tatsushi Shima, Kaoru Taketani, Satoru Yamashita, Akihiro Yoshimi

    IEEE Transactions on Applied Superconductivity   Vol. 22 ( 3 )   2012

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    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

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    Scopus

  120. Present status of neutron fundamental physics at J-PARC Reviewed

    Yasushi Arimoto, Haruhiko Funahashi, Nao Higashi, Masahiro Hino, Katsuya Hirota, Shohei Imajo, Takashi Ino, Yoshihisa Iwashita, Ryo Katayama, Masaaki Kitaguchi, Kenji Mishima, Suguru Muto, Hideyuki Oide, Hidetoshi Otono, Yoshichika Seki, Tatsushi Shima, Hirohiko M. Shimizu, Kaoru Taketani, Takahiro Yamada, Satoru Yamashita, Tamaki Yoshioka

    Progress of Theoretical and Experimental Physics   Vol. 2012 ( 1 )   2012

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    © The Author(s) 2012. 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

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    Scopus

  121. Research toward the development of compact neutron interference imaging instrument with gratings Reviewed

    Yoshie Otake, Margie Olbinado, Yoshichika Seki, Katsuya Hirota, Yutaka Yamagata, Jungmyoung Ju, Tomohiro Adachi, Shinya Morita, Yoshihisa Iwashita, Masahiro Hino, Masahiro Ichikawa, Masaaki Kitaguchi, Toshio Takahashi, Hideki Yoshizawa, Seung Wook Lee, Wataru Yashiro, Atsushi Momose

    5TH EUROPEAN CONFERENCE ON NEUTRON SCATTERING   Vol. 340   2012

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    The neutron interference imaging experiment with two absorption gratings has been done. We develop new way to fabricate absorption gratings for neutron with the pitch of 150 mu m, 180 mu m, and 200 mu m. Compact imaging detector system is developed, whose weight is 2kg. Small break in an acrylic plate, the welded place of Nb plate were observed, it reveals that the neutron interference imaging method can become new method of a nondestructive inspection for reinforced plastics and composite material such as CFRP and so on.

    DOI: 10.1088/1742-6596/340/1/012035

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  122. A compact TOF-SANS using focusing lens and very cold neutrons Reviewed

    Masako Yamada, Yoshihisa Iwashita, Toshiji Kanaya, Norifumi L. Yamada, Hirohiko M. Shimizu, Kenji Mishima, Masahiro Hino, Masaaki Kitaguchi, Katsuya Hirota, Peter Geltenbort, Bruno Guerard, Giuliana Manzin, Ken Anderson, Jyotsana Lal, John M. Carpenter, Markus Bleuel, Shane J. Kennedy

    PHYSICA B-CONDENSED MATTER   Vol. 406 ( 12 ) page: 2453 - 2457   2011.6

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    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 x 10(4) to 5.9 x 10(4) T/m(2), with frequency &lt;= 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 angstrom, 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 angstrom(-1) &lt;= q &lt;= 0.3 angstrom(-1) or 0.004 angstrom(-1) &lt;= q &lt;= 0.08 angstrom(-1) 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). (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2010.12.002

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  123. High resolution NRSE spectrometer with 2D-focusing supermirrors Reviewed

    Masaaki Kitaguchi, Masahiro Hino, Yuji Kawabata, Seiji Tasaki, Ryuji Maruyama, Toru Ebisawa

    PHYSICA B-CONDENSED MATTER   Vol. 406 ( 12 ) page: 2470 - 2472   2011.6

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    In the neutron resonance spin echo (NRSE) spectrometer [1] the divergent beam provides the deviation of the flight length, which makes the phase difference between neutron spin states and also decreases the contrast of the spin echo signals. The flight length can be adjusted by using parabolic focusing mirrors [11], which can be fabricated with replica technique. Correction for beam divergence effect in the NRSE spectrometer using 2D-focusing supermirrors will be discussed. (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2010.11.062

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  124. Measurement of the neutron beam polarization of BL05/NOP beamline at J-PARC Reviewed

    T. Ino, Y. Arimoto, T. Yoshioka, K. Mishima, K. Taketani, S. Muto, H. M. Shimizu, H. Kira, Y. Sakaguchi, T. Oku, K. Sakai, T. Shinohara, J. Suzuki, H. Otono, H. Oide, S. Yamashita, S. Imajo, H. Funahashi, M. Yamada, Y. Iwashita, M. Kitaguchi, M. Hino, Z. Suzuki, T. Sanuki, T. Seki, K. Hirota, K. Ikeda, H. Sato, Y. Otake, H. Ohmori, T. Morishima, T. Shima

    PHYSICA B-CONDENSED MATTER   Vol. 406 ( 12 ) page: 2424 - 2428   2011.6

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    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(-3) using polarized He-3 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. (C) 2011 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2011.01.009

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  125. MIEZE型スピンエコーの開発 Reviewed

    日野正裕, 北口雅暁, 海老沢徹, 阿知波紀郎, 片桐政樹, BLEUEL Markus, 川端祐司, 及川健一, 前川藤夫, 林田洋寿, 山崎大, 瀬戸秀紀, 清水裕彦

    日本原子力研究開発機構JAEA-Review(Web)   ( 2011-014 ) page: 2.4.8 (WEB ONLY)   2011.6

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    J-GLOBAL

  126. A high S/N ratio spin flip chopper system for a pulsed neutron source Reviewed

    K. Taketani, T. Ebisawa, M. Hino, K. Hirota, T. Ino, M. Kitaguchi, K. Mishima, S. Muto, H. Oide, T. Oku, H. Otone, K. Sakai, T. Shima, H. M. Shimizu, S. Yamashita, T. Yoshioka

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 634   page: S134 - S137   2011.4

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    We report a successful demonstration of a high SIN ratio spin flip chopper (SFC) system for pulsed neutron sources. The system consists of two SFCs and each SFC consists of a radio frequency (RF) flipper and Soller magnetic supermirrors. The aperture of the Soller mirror was 18 mm in width and 20 mm in height. The S/N ratio of the system was 306:1. This system is going to be installed to measure neutron lifetime precisely using the cold-neutron beam line, BL05 polarized-beam branch, at the Materials and Life Science Experimental Facility (MLF) in Japan Proton Accelerator Research Complex (J-PARC). (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2010.06.357

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  127. A transport optics for pulsed ultracold neutron sources Reviewed

    H. M. Shimizu, Y. Iwashita, M. Kitaguchi, K. Mishima, T. Yoshioka

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 634   page: S25 - S27   2011.4

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    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. (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2010.06.210

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  128. Polarization of very cold neutron using a permanent magnet quadrupole Reviewed

    Tamaki Yoshioka, Kenji Mishima, Takashi Ino, Kaoru Taketani, Suguru Muto, Takahiro Morishima, Hirohiko M. Shimizu, Takayuki Oku, Junichi Suzuki, Takenao Shinohara, Kenji Sakai, Hiromi Sato, Katsuya Hirota, Yoshie Otake, Masaaki Kitaguchi, Masahiro Hino, Yoshichika Seki, Yoshihisa Iwashita, Masako Yamada, Masahiro Ichikawa, Takanori Sugimoto, Shinsuke Kawasaki, Sachio Komamiya, Hidetoshi Otono, Yoshio Kamiya, Satoru Yamashita, Peter Geltenbort

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 634   page: S17 - S20   2011.4

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    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(-3). 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. (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2010.05.029

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  129. The performance of magnetic lens for focusing VCN-SANS Reviewed

    M. Yamada, Y. Iwashita, T. Kanaya, M. Ichikawa, H. Tongu, S. J. Kennedy, H. M. Shimizu, K. Mishima, N. L. Yamada, K. Hirota, J. M. Carpenter, J. Lal, K. Andersen, P. Geltenbort, B. Guerard, G. Manzin, M. Hino, M. Kitaguchi, M. Bleuel

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 634   page: S156 - S160   2011.4

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    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 x 10(4)T/m(2) &lt;= g&apos; &lt;= 5.9 x 10(4) T/m(2). 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 (approximate to 3 mm) over a wavelength range of 30 angstrom &lt;= lambda &lt;= 48 angstrom in focal length of approximate to 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)(100)(PPO)(65)(PEO)(100) tri-block copolymer in deuterium oxide. The results of the focusing experiment and the focusing VCN-SANS are presented. (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2010.06.259

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  130. Longitudinal-gradient magnet for time focusing of ultra-cold neutrons Reviewed International journal

    Y. Arimoto, T. Yoshioka, H. M. Shimizu, K. Mishima, T. Ino, K. Taketani, S. Muto, M. Kitaguchi, S. Imajo, Y. Iwashita, S. Yamashita, Y. Kamiya, A. Yoshimi, K. Asahi, T. Shima, K. Sakai

    2ND INTERNATIONAL WORKSHOP ON THE PHYSICS OF FUNDAMENTAL SYMMETRIES AND INTERACTIONS (PSI)   Vol. 17   2011

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    A gradient DC magnet is designed using 3D magnetic field analysis code. This magnet, referred to as a B-0 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 &lt;= y &lt;= 3 cm at any z position in the spin-flipping region. Tracking simulations show that the B-0 magnet is capable of accepting UCNs in the velocity range 2.3 similar to 3.3 m/s.

    DOI: 10.1016/j.phpro.2011.06.013

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  131. The novel method of focusing-sans with rotating magnetic sextupole lens and very cold neutrons

    M. Yamada, Y. Iwashita, M. Ichikawa, H. Tongu, T. Kanaya, S. J. Kennedy, N. L. Yamada, H. M. Shimizu, K. Mishima, M. Hino, M. Kitaguchi, K. Hirota, P. Geltenbort, B. Guerard, G. Manzin, K. Andersen, J. Lal, J. M. Carpenter, M. Bleuel

    IPAC 2010 - 1st International Particle Accelerator Conference     page: 427 - 429   2010.12

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    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 ?15 mm and the magnetic length 66 mm. The modulation range of magnetic field strength g inside the bore 1.5×104 T/m ? g ? 5.9×10 T/m2 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 ? ? λ ? 48 ? 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)(PEO100-PPO 65-PEO100) called Pluronic F127 as a sample, which has been well studied since 1990&#039; [4]. The measureable q range of this system were 0.009 ?-1 ? q ? 0.3 ?-1 or 0.004 ?-1 q ? 0.08 ?-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.

  132. Multilayer Neutron Interferometer with Complete Path Separation Reviewed

    Yoshichika Seki, Haruhiko Funahashi, Masaaki Kitaguchi, Masahiro Hino, Yoshie Otake, Kaoru Taketani, Hirohiko M. Shimizu

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 79 ( 12 )   2010.12

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    We have developed a new multi layer cold-neutron interferometer using a pair of beam splitting etalons (BSEs) with an air gap of 189 mu m 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.

    DOI: 10.1143/JPSJ.79.124201

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  133. Development of a pixel detector for ultra-cold neutrons Reviewed International coauthorship International journal

    Kawasaki, S., Ichikawa, G., Hino, M., Kamiya, Y., Kitaguchi, M., Komamiya, S., Sanuki, T., Sonoda, S.

    Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment   Vol. 615 ( 1 )   2010

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    DOI: 10.1016/j.nima.2010.01.011

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  134. Neutron Imaging of Industrial Components and Simulation Using VCAD System

    Y.Yamagata, K.Hirota, S.morita, J.Ju, Y.Ohtake, H.Ypkota, T.Sera, H.Sunaga, Y.Kawabata, M.Hino, M.Kitaguchi, M.Sugiyama

    KURRI Progress Report     page: 116 - 116   2010

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  135. Highly polarized very cold neutrons through a permanent magnet quadrupole Reviewed

    Kaoru Taketani, Kenji Mishima, Takashi Ino, Tamaki Yoshioka, Suguru Muto, Takahiro Morishima, Hirohiko M. Shimizu, Takayuki Oku, Junichi Suzuki, Takenao Shinohara, Kenji Sakai, Hiromi Sato, Katsuya Hirota, Yoshie Otake, Masaaki Kitaguchi, Masahiro Hino, Yoshichika Seki, Yoshihisa Iwashita, Masako Yamada, Masahiro Ichikawa, Takanori Sugimoto, Shinsuke Kawasaki, Sachio Komamiya, Yoshio Kamiya, Hidetoshi Otono, Satoru Yamashita, Peter Geltenbort

    Physica B: Condensed Matter   Vol. 404 ( 17 ) page: 2643 - 2645   2009.9

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    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

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    Scopus

  136. A beam divergence correction mirror for neutron resonance spin echo Reviewed International journal

    R. Maruyama, M. Hino, H. Hayashida, M. Kitaguchi, N. Achiwa, D. Yamazaki, T. Ebisawa, K. Soyama

    Physica B: Condensed Matter   Vol. 404 ( 17 ) page: 2594 - 2599   2009.9

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    Language:Japanese   Publishing type:Research paper (international conference proceedings)   Publisher:Elsevier {BV}  

    DOI: 10.1016/j.physb.2009.06.036

  137. Development of neutron resonance spin flipper for high resolution spin echo spectrometer Reviewed International journal

    Kitaguchi M, Hino M, Kawabata Y, Tasaki S, Hayashida H, Maruyama R, Ebisawa T

    Physica B: Condensed Matter   Vol. 404 ( 17 ) page: 2590 - 2593   2009.9

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    DOI: 10.1016/j.physb.2009.06.030

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    Other Link: http://orcid.org/0000-0002-9460-2357

  138. A new MIEZE technique for investigating relaxation of magnetic nanoparticles Reviewed

    Hirotoshi Hayashida, Masahiro Hino, Masaaki Kitaguchi, Norio Achiwa, Yuji Kawabata

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 600 ( 1 ) page: 56 - 59   2009.2

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    There is no reduction in the contrast of a modulated intensity of zero effort (MIEZE) signal even when magnetic scattering occurs, whereas the contrasts of neutron spin echo and neutron resonance spin echo are reduced by more than a factor of two. However, since MIEZE measures both the intensities of quasielastic nuclear and magnetic scatterings, it is generally not easy to use a conventional MIEZE setup to simultaneously separate magnetic and nonmagnetic fluctuations of magnetic nanoscale particles. We propose a new MIEZE technique, which involves inserting a second analyzer and an additional pi-flipper that is able to distinguish between the magnetic and nonmagnetic quasielastic scattering intensities. We succeeded in observing superparamagnetic fluctuations of magnetite particles in a ferrofluid by using this new technique. (C) 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2008.11.101

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  139. Development of devices for beam divergence correction in the high-resolution NRSE spectrometer Reviewed

    Masaaki Kitaguchi, Masahiro Hino, Yuji Kawabata, Hirotoshi Hayashida, Seiji Tasaki, Ryuji Maruyama, Toru Ebisawa

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 600 ( 1 ) page: 117 - 119   2009.2

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    Correction for beam divergence effect in the neutron resonance spin echo (NRSE) spectrometer will be discussed. The new type of devices called "coupling coils" is proposed to change the spin quantization axis for the correction. The feasibility of correction for the vertical divergence has been demonstrated by numerical calculations and Monte-Carlo simulations. (C) 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2008.11.072

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  140. A study on reflectivity limit of neutron supermirror Reviewed

    Masahiro Hino, Masaaki Kitaguchi, Hirotoshi Hayashida, Seiji Tasaki, Toru Ebisawa, Ryuji Maruyama, Norio Achiwa, Yuji Kawabata

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 600 ( 1 ) page: 207 - 209   2009.2

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    We have fabricated m=2.9 NiC/Ti supermirror on a silicon wafer in which surface roughness is about 0.4 nm by ion beam sputtering technique. The reflectivity of supermirror at m=2.8 and 2.9 were 0.94 and 0.90, respectively. The reflectivity, of 0.94 at m=2.8 is in the vicinity of theoretical limit including the effects of absorption and incoherent scattering. We show the experimental results and theoretical expectation based on a simple Debye-Waller roughness model, and discuss realistic reflectivity limit of supermirror deposited on the ordinary silicon substrate. (c) 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2008.11.125

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  141. Shield evaluation of cold neutron curved guide tubes for J-PARC neutron resonance spin echo spectrometers Reviewed

    Toru Ebisawa, Kazuhiko Soyama, Dai Yamazaki, Ryuji Maruyama, Seiji Tasaki, Yutaka Abe, Hiroyuki Hayashida, Masahiro Hino, Masaaki Kitaguchi, Yuji Kawabata, Koji Niita

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 600 ( 1 ) page: 126 - 128   2009.2

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    it is planned that three neutron resonance spin echo spectrometers will be installed in the No. 17 beam port of JSNS. In order to install these three spectrometers in one beam port, the neutron incident beam system to be installed in No. 17 port cannot only supply three polarized neutron beams to these spectrometers, but should also create very low background levels of neutron and gamma rays in the experimental area. We report based on shield evaluations how to realize the low background level by using two highly curved neutron guide tubes with high quality supermirrors. (C) 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2008.11.090

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  142. A CCD-based Pixel Detector with Micron Spatial Resolution for Ultra Cold Neutrons Reviewed

    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     page: 1619 - +   2009

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    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

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  143. Design of neutron beamline for fundamental physics at J-PARC BL05 Reviewed International journal

    K. Mishima, T. Ino, K. Sakai, T. Shinohara, K. Hirota, K. Ikeda, H. Sato, Y. Otake, H. Ohmori, S. Muto, N. Higashi, T. Morishima, M. Kitaguchi, M. Hino, H. Funahashi, T. Shima, J. Suzuki, K. Niita, K. Taketani, Y. Seki, H.M. Shimizu

    Nucl. Instr. and Methods in Phys. Res. A   Vol. 600   page: 342 - 345   2009

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    DOI: 10.1016/j.nima.2008.11.087

  144. A study of resolution function on a MIEZE spectrometer Reviewed International journal

    H. Hayashida, M. Hino, M. Kitaguchi, Y. Kawabata, N. Achiwa

    Measurement Science and Technology   Vol. 19 ( 3 )   2008.3

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    We have installed a MIEZE (modulated intensity by zero effort) spectrometer in the C3-1-2-2(MINE1) port at JRR-3M. In the MIEZE spectrometer, a sample is placed after the analyzer. Thus the contrast of the MIEZE signal can be observed without reduction even in the case of magnetic scattering where the signal for NSE (neutron spin echo) and NRSE (neutron resonance spin echo) instruments is less than half. The MIEZE signal is sensitive to the dispersion of neutron trajectories from the sample to the detector. In other words, the MIEZE signal is reduced only due to the dispersion even without in- and quasi-elastic scattering. We studied the correlation between experimental configuration and its resolution function using the Monte Carlo simulation. We prepared a magnetite ferrofluid sample with a typical particle diameter of 84 , and examined the simulation model by experiments. © 2008 IOP Publishing Ltd.

    DOI: 10.1088/0957-0233/19/3/034006

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  145. Correction for beam divergence effect in a NRSE spectrometer with high resolution Reviewed International journal

    Kitaguchi M, Hino M, Kawabata Y, Hayashida H, Tasaki S, Maruyama R, Ebisawa T

    Measurement Science and Technology   Vol. 19 ( 3 ) page: 034014   2008.1

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    DOI: 10.1088/0957-0233/19/3/034014

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    Other Link: http://orcid.org/0000-0002-9460-2357

  146. Partial decay widths of the φ into e<sup>+</sup>e<sup>-</sup> and K<sup>+</sup>K<sup>-</sup> pairs in 12 GeV p + a reactions at KEK-PS E325 Reviewed

    F. Sakuma, J. Chiba, H. En'yo, Y. Fukao, H. Funahashi, H. Hamagaki, M. Ieiri, M. Ishino, H. Kanda, M. Kitaguchi, S. Mihara, K. Miwa, T. Miyashita, T. Murakami, R. Muto, T. Nakura, M. Naruki, K. Ozawa, O. Sasaki, M. Sekimoto, T. Tabaru, K.H. Tanaka, M. Togawa, S. Yamada, S. Yokkaichi, Y. Yoshimura

    Modern Physics Letters A   Vol. 23 ( 27-30 ) page: 2401 - 2404   2008

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    DOI: 10.1142/S0217732308029472

  147. Observation of MIEZE signal with an effective frequency of 1 MHz Reviewed

    Hirotoshi Hayashida, Masaaki Kitaguchi, Masahiro Hino, Yuji Kawabata, Toru Ebisawa

    PHYSICA B-CONDENSED MATTER   Vol. 397 ( 1-2 ) page: 144 - 146   2007.7

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    We developed a modulated intensity of zero effort (MIEZE) spectrometer with an effective frequency of I MHz. Three resonance spin flippers (RSFs) and two-dimentional position sensitive detector (2D-PSD) were used for the MIEZE spectrometer. The frequency of RSFs was 0.5 MHz and 2D-PSD works in TOF mode with 100 ns. The incident neutron wavelength was 0.81 nm and the distance between sample position and detector position was 0.5 in. The Fourier time was estimated to be 1.7 ns. The contrast of the I MHz echo signal was 0.4. (c) 2007 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2007.02.087

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  148. Moire fringes in a neutron spin interferometer Reviewed

    Kaoru Taketani, Yoshichika Seki, Haruhiko Funahashi, Masahiro Hino, Masaaki Kitaguchi, Yoshic Otake, Hirohiko M. Shimizu

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 76 ( 6 )   2007.6

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    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.

    DOI: 10.1143/JPSJ.76.064008

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  149. Development of a resonance spin flipper for NRSE/MIEZE on a pulsed neutron beam with an oscillating frequency of 500kHz Reviewed International journal

    Hirotoshi Hayashida, Masaaki Kitaguchi, Masahiro Hino, Yuji Kawabata, Ryuji Maruyama, Toru Ebisawa

    Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   Vol. 574 ( 2 ) page: 292 - 296   2007.5

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    DOI: 10.1016/j.nima.2007.01.179

  150. Nuclear-matter modification of decay widths in the phi -&gt; e(+)e(-) and phi -&gt; K+K- channels Reviewed

    F. Sakuma, J. Chiba, H. En'yo, Y. Fukao, H. Funahashi, H. Hamagaki, M. Ieiri, M. Ishino, H. Kanda, M. Kitaguchi, S. Mihara, K. Miwa, T. Miyashita, T. Murakami, R. Muto, T. Nakura, M. Naruki, K. Ozawa, O. Sasaki, M. Sekimoto, T. Tabaru, K. H. Tanaka, M. Togawa, S. Yamada, S. Yokkaichi, Y. Yoshimura

    PHYSICAL REVIEW LETTERS   Vol. 98 ( 15 )   2007.4

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    The invariant mass spectra of phi -&gt; K+ K- are measured in 12 GeV p + A reactions in order to search for the in-medium modification of phi mesons. The observed K+ K- spectra are well reproduced by the relativistic Breit-Wigner function with a combinatorial background shape in three beta gamma regions between 1.0 and 3.5. The nuclear mass number dependence of the yields of the K+ K- decay channel is compared to the simultaneously measured e(+) e(-) decay channel for carbon and copper targets. We parameterize the production yields as sigma(A) = sigma(0)A(alpha) and obtain alpha(phi -&gt; K+K-) - alpha(phi -&gt; e+e-) to be 0: 14 +/- 0: 12. Limits are obtained for the partial decay widths of the phi mesons in nuclear matter.

    DOI: 10.1103/PhysRevLett.98.152302

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  151. Evidence for in-medium modification of the meson at normal nuclear density Reviewed International journal

    R. Muto, J. Chiba, H. En'Yo, Y. Fukao, H. Funahashi, H. Hamagaki, M. Ieiri, M. Ishino, H. Kanda, M. Kitaguchi, S. Mihara, K. Miwa, T. Miyashita, T. Murakami, T. Nakura, M. Naruki, K. Ozawa, F. Sakuma, O. Sasaki, M. Sekimoto, T. Tabaru, K.H. Tanaka, M. Togawa, S. Yamada, S. Yokkaichi, Y. Yoshimura

    Physical Review Letters   Vol. 98 ( 4 )   2007

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    DOI: 10.1103/PhysRevLett.98.042501

  152. Medium modification of vector mesons observed in 12 GeV p+A reactions Reviewed

    M. Naruki, H. En'Yo, R. Muto, T. Tabaru, S. Yokkaichi, Y. Fukao, H. Funahashi, M. Ishino, H. Kanda, M. Kitaguchi, S. Mihara, K. Miwa, T. Miyashita, T. Murakami, T. Nakura, F. Sakuma, M. Togawa, S. Yamada, Y. Yoshimura, J. Chiba, M. Ieiri, O. Sasaki, M. Sekimoto, K.H. Tanaka, H. Hamagaki, K. Ozawa

    Journal of Physics G: Nuclear and Particle Physics   Vol. 34 ( 8 ) page: S1059-S1063   2007

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    DOI: 10.1088/0954-3899/34/8/S156

  153. Study of in-medium meson modification in 12 GeV p + A reactions Reviewed

    S. Yokkaichi, H. En'yo, M. Naruki, R. Muto, T. Tabaru, J. Chiba, M. Ieiri, M. Sekimoto, O. Sasaki, K.H. Tanaka, H. Funahashi, Y. Fukao, M. Kitaguchi, M. Ishino, H. Kanda, S. Mihara, T. Miyashita, K. Miwa, T. Murakami, T. Nakura, F. Sakuma, M. Togawa, S. Yamada, Y. Yoshimura, H. Hamagaki, K. Ozawa

    International Journal of Modern Physics A   Vol. 22 ( 2-3 ) page: 397 - 405   2007

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    DOI: 10.1142/S0217751X07035586

  154. A test of MIEZE-reflectometer for study of surface and interface Reviewed

    Masahiro Hino, Masaaki Kitaguchi, Hirotoshi Hayashida, Yuji Kawabata, Seiji Tasaki, Toru Ebisawa, Dai Yamazaki, Ryuji Maruyama, Keiji Tanaka, Naoya Torikai, Rintaro Inoue, Toshiji Kanaya

    PHYSICA B-CONDENSED MATTER   Vol. 385-86   page: 1125 - 1127   2006.11

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    We have installed a MIEZE-type spin echo spectrometer at the C3-1-2-2 (MINE1) port at the JRR-3 M in the Japan Atomic Energy Agency. By combining neutron reflectometry and the MIEZE, it is possible to detect inelastic and quasi-elastic scattering on the surface and at the interface. We have succeeded in measuring a MIEZE signal for which the Fourier time is up to 0.8 us. Though the Fourier time is small, we tested several samples by the MIEZE reflectometer. (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2006.05.388

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  155. Development of neutron resonance spin flipper for high resolution NRSE spectrometer Reviewed

    Masaaki Kitaguchi, Masahiro Hino, Yuji Kawabata, Hirotoshi Hayashida, Seiji Tasaki, Ryuji Maruyama, Dai Yamazaki, Toru Ebisawa, Naoya Torikai

    PHYSICA B-CONDENSED MATTER   Vol. 385-86   page: 1128 - 1130   2006.11

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    Neutron spin echo (NSE) is one of the techniques with the highest energy resolution for measurement of quasi-elastic scattering. In neutron resonance spin echo (NRSE), two separated neutron resonance spin flippers (RSFs) replace a homogeneous static magnetic field for spin precession in a conventional NSE. We have made a new type of RSF with pure aluminum wires in order to reduce the scattering from the surface. Test experiments have been performed at cold neutron beam line MINE1 at JRR-3M reactor in JAERI and the beam line CN3 at KUR The spin-flip probability was higher than 0.95 at a neutron wavelength of 0.81 ran and a RSF frequency of 100 kHz. (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2006.05.389

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  156. Development of large-m polarizing neutron supermirror fabricated by using ion beam sputtering instrument at KURRI Reviewed

    Masahiro Hino, Hirotoshi Hayashida, Masaaki Kitaguchi, Yuji Kawabata, Masayasu Takeda, Ryuji Maruyama, Toru Ebisawa, Naoya Torikai, Tetsuya Kume, Seiji Tasaki

    PHYSICA B-CONDENSED MATTER   Vol. 385-86   page: 1187 - 1189   2006.11

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    Authors have succeeded in fabricating m = 3.9 Fe/Si and m = 5 Fe/Ge polarizing neutron supermirrors with high reflectivity using ion beam sputtering instrument installed at KURRI. The reflectivity of up-spin neutron are above 0.80 and 0.67 for the m = 3.9 Fe/Si and m = 5 Fe/Ge supermirrors with external magnetic field of 45 mT, in which number of layers are 1600 and 3750, respectively. The polarization efficiencies are about 0.90. (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2006.05.404

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  157. Moire fringes of cold neutron with large divergence angle Reviewed

    Kaoru Taketani, Haruhiko Funahashi, Yoshichika Seki, Masahiro Hino, Masaaki Kitaguchi, Yoshie Otake, Hirohiko M. Shimizu

    PHYSICA B-CONDENSED MATTER   Vol. 385-86   page: 1222 - 1224   2006.11

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    Moire 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 Moire loci, for the observation of Moire fringes, and is not required to be less than the angular separation of the two beam paths. (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2006.05.412

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  158. Neutron resonance spin echo and MIEZE spectrometer development project in Japan Reviewed

    Yuji Kawabata, Masahiro Hino, Masaaki Kitaguchi, Hirotoshi Hayashida, Seiji Tasaki, Toru Ebisawa, Dai Yamazaki, Ryuji Maruyama, Hideki Seto, Michihiro Nagao, Toshiji Kanaya

    PHYSICA B-CONDENSED MATTER   Vol. 385-86   page: 1122 - 1124   2006.11

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    A project for the development of neutron spin echo spectrometers using neutron resonance spin flippers with a pulsed neutron source has been launched. The system consists of a set of three different machines, a MIEZE spectrometer, a high intensity NRSE spectrometer and a high energy resolution Neutron resonance spin echo (NRSE) spectrometer. The design target of this system when installed in J-PARC ;is as follows: (1) MIEZE: 0.01 &lt; Q &lt; 3.5 (I/A), 20 &lt; t &lt; 1300 (ps); (2) high intensity NRSE: 0.005 &lt; Q &lt; 3.1 (I/A), I &lt; t &lt; 170 (ns); (3) high resolution NRSE: 0.003 &lt; Q &lt; 1.2 (I/A), 0.03 &lt; t &lt; 1 (ps). (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physb.2006.05.387

    Web of Science

  159. First observation of phi-meson mass modification in nuclear medium Reviewed

    R. Muto, J. Chiba, H. En'yo, Y. Fukao, H. Funahashi, H. Hamagaki, M. Ieiri, M. Ishino, H. Kanda, M. Kitaguchi, S. Mihara, K. Miwa, T. Miyashita, T. Murakami, T. Nakura, M. Naruki, M. Nomachi, K. Ozawa, F. Sakuma, O. Sasaki, H. D. Sato, M. Sekimoto, T. Tabaru, K. H. Tanaka, M. Togawa, S. Yamada, S. Yokkaichi, Y. Yoshimura

    NUCLEAR PHYSICS A   Vol. 774   page: 723 - 726   2006.8

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    We have measured e(+)e(-) invariant mass spectra in 12 GeV p + A interactions at the KEK Proton-Synchrotron. The aim of the experiment is to detect possible in-medium modification of vector mesons at normal nuclear density. We used carbon and copper targets to study the nuclear size dependence of the e(+)e(-) invariant mass spectra. A significant enhancement on the low-mass side of the phi meson peak was observed in the low beta gamma region (beta gamma(phi) &lt; 1.25) in the copper data. On the other hand, in the higher beta gamma region (beta gamma(phi) &lt; 1.25), both the spectral shapes obtained from carbon and copper targets were consistent with the expected one from the simulation. This observation is consistent with a picture of the phi modification in a nucleus, i.e. normal nuclear density, because such an effect should be visible only for slowly moving mesons produced in a larger nucleus.

    DOI: 10.1016/j.nuclphysa.2006.06.123

    Web of Science

  160. Nuclear mass number dependence of inclusive production of omega and phi mesons in 12 GeV p plus A collisions Reviewed

    T. Tabaru, H. En'yo, R. Muto, M. Naruki, S. Yokkaichi, J. Chiba, M. Ieiri, O. Sasaki, M. Sekimoto, K. H. Tanaka, H. Funahashi, Y. Fukao, M. Kitaguchi, M. Ishino, H. Kanda, S. Mihara, T. Miyashita, K. Miwa, T. Murakami, T. Nakura, F. Sakuma, M. Togawa, S. Yamada, Y. Yoshimura, H. Hamagaki, K. Ozawa

    PHYSICAL REVIEW C   Vol. 74 ( 2 )   2006.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMERICAN PHYSICAL SOC  

    The inclusive production of omega and phi mesons is studied in the backward region of the interaction of 12 GeV protons with polyethylene, carbon, and copper targets. The mesons are measured in e(+)e(-) decay channels. The production cross sections of the mesons are presented as functions of rapidity y and transverse momentum p(T). The nuclear mass number dependences (A dependences) are found to be A(0.710 +/- 0.021(stat)+/- 0.037(syst)) for omega mesons and A(0.937 +/- 0.049(stat)+/- 0.018(syst)) for phi mesons in the region of 0.9 &lt; y &lt; 1.7 and p(T)&lt; 0.75 GeV/c.

    DOI: 10.1103/PhysRevC.74.025201

    Web of Science

  161. Observation of MIEZE signal with an effective frequency of 1 MHz Reviewed

    H. Hayashida, M. Kitaguchi, M. Hino, Y. Kawabata, T. Ebisawa

    KURRI Progress Report     page: 172   2006.4

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    Scopus

  162. Study of new layer structure for large-m polarizing neutron supermirror Reviewed

    M. Hino, M. Kitaguchi, H. Hayashida, Y. Kawabata, T. Ebisawa, R. Maruyama, T. Kume, S. Tasaki

    KURRI Progress Report     page: 171   2006.4

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    Scopus

  163. Experimental signature of medium modifications for rho and omega mesons in the 12 GeV p+A reactions Reviewed

    M Naruki, Y Fukao, H Funahashi, M Ishino, H Kanda, M Kitaguchi, S Mihara, K Miwa, T Miyashita, T Murakami, T Nakura, F Sakuma, M Togawa, S Yamada, Y Yoshimura, H En'yo, R Muto, T Tabaru, S Yokkaichi, J Chiba, M Ieiri, O Sasaki, M Sekimoto, KH Tanaka, H Hamagaki, K Ozawa

    PHYSICAL REVIEW LETTERS   Vol. 96 ( 9 )   2006.3

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    The invariant mass spectra of e(+)e(-) pairs produced in 12 GeV proton-induced nuclear reactions are measured at the KEK Proton Synchrotron. On the low-mass side of the omega meson peak, a significant enhancement over the known hadronic sources has been observed. The mass spectra, including the excess, are well reproduced by a model that takes into account the density dependence of the vector meson mass modification, as theoretically predicted.

    DOI: 10.1103/PhysRevLett.96.092301

    Web of Science

  164. Development of neutron multiplayer mirrors on beam splitting etalons for pulsed neutrons Reviewed

    H. Funahashi, M. Kitaguchi, M. Hino, Y. Seki, K. Taketani

    KURRI Progress Report     page: 173-   2006

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  165. KEK-PS E325 Collaboration Reviewed

    R. Muto, J. Chiba, H. En'yo, Y. Fukao, H. Funahashi, H. Hamagaki, M. Ieiri, M. Ishino, H. Kanda, M. Kitaguchi, S. Mihara, K. Miwa, T. Miyashita, T. Murakami, T. Nakura, M. Naruki, M. Nomachi, K. Ozawa, F. Sakuma, O. Sasaki, H.D. Sato, M. Sekimoto, T. Tabaru, K.H. Tanaka, M. Togawa, S. Yamada, S. Yokkaichi, Y. Yoshimura

    Nuclear Physics A   Vol. 774 ( 1-4 ) page: 942-   2006

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    DOI: 10.1016/j.nuclphysa.2006.07.009

  166. Experimental Study of in-medium meson modification at the KEK 12 GeV PS(Hadrons at finite density) Reviewed

    Yokkaichi S., Chiba J., En'yo H., Fukao Y., Funahashi H., Hamagaki H., Ieiri M., Ishino M., Kanda H., Kitaguchi M., Mihara S., Miyashita T., Miwa K., Murakami T., Muto R., Nakura T, Naruki M., Ozawa K., Sakuma F., Sasaki O., Sekimoto M., Tabaru T., Tanaka K. H., Togawa M., Yamada S., Yoshimura Y.

    Soryushiron Kenkyu Electronics   Vol. 114 ( 2 ) page: B7 - B12   2006

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Soryushiron Kenkyu Editorial Office  

    Invariant mass spectra of low-mass vector mesons in the e^+e^- channel are measured in 12 GeV p+C and p+Cu reactions (√<s>=5.1 GeV) at the KEK 12 GeV Proton Synchrotron. A significant excess is observed on the low-mass side of the ω meson peak over the known hadronic sources in the data of both C and Cu targets. Furthermore, an excess is found below the φ meson peak in the Cu target data in the slowest βγ region (βγ<1.25). They can be interpreted as signatures of the spectral modification of vector mesons in cold nuclear matter.

    DOI: 10.24532/soken.114.2_B7

    CiNii Books

  167. Radiation induced surface activation on SUS304 rod surface coated with thin film layer formed by vacuum evaporation method Reviewed

    J. Zhang, Y. Saito, K. Mishima, M. Hino, M. Kitaguchi, Y. Kawabata

    KURRI Progress Report     page: 177-   2006

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  168. Refined schematic design of neutron resonance spin echo spectrometers for J-PARC

    Hino Masahiro, Kawabata Yuji, Tasaki Seiji, Maruyama Ryuji, Kitaguchi Masaaki, Ebisawa Toru, Achiwa Norio

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2005 ( 0 ) page: 117 - 117   2005

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    Publisher:Atomic Energy Society of Japan  

    DOI: 10.11561/aesj.2005s.0.117.0

  169. Cold-neutron interferometry using beam splitting etalons Reviewed

    M Kitaguchi, H Funahashi, T Nakura, K Taketani, M Hino, Y Otake, HM Shimizu

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 529 ( 1-3 ) page: 190 - 193   2004.8

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    A novel type of cold-neutron interferometer based on a pair of new devices named 'beam splitting etalons (BSE)' has been developed. The parallelism between the two planes in each BSE and the equality of gap thicknesses of the two BSEs ensure the alignment of four independent multilayer mirrors in the interferometer within the precision required by the three-dimensional coherency of the beam. Various arrangements of BSEs enables us to build new types of coherent optical systems for cold neutrons. (C) 2004 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2004.04.203

    Web of Science

  170. Experimental signature of in-medium mass modification of vector mesons at normal nuclear density Reviewed

    R Muto, J Chiba, H En'yo, Y Fukao, H Funahashi, H Hamagaki, M Ieiri, M Ishino, H Kanda, M Kitaguchi, S Mihara, K Miwa, T Miyashita, T Murakami, T Nakura, M Naruki, M Nomachi, K Ozawa, F Sakuma, O Sasaki, HD Sato, M Sekimoto, T Tabaru, KH Tanaka, M Togawa, S Yamada, S Yokkaichi, Y Yoshimura

    JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS   Vol. 30 ( 8 ) page: S1023 - S1026   2004.8

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    We measured invariant mass spectra of e(+)e(-) pairs produced in 12 GeV p+A interaction to investigate in-medium mass modification of vector mesons. We observed an enhancement over the known hadronic sources on the low-mass side of the omega meson mass peak. The obtained rho/omega ratio indicates that this enhancement mainly results from rho mesons whose mass was modified in nuclear matter. We performed a toy model calculation based on the prediction using the QCD sum rule. It reproduced well the tendency of our data.

    DOI: 10.1088/0954-3899/30/8/051

    Web of Science

  171. Spectrometer for measurements of phi mesons in nuclear matter produced through 12-GeV p + A reactions Reviewed

    M Sekimoto, J Chiba, H Funahashi, H Hamagaki, M Ieiri, M Ishino, M Kitaguchi, S Mihara, T Miyashita, T Murakami, R Muto, M Naruki, M Nomachi, K Ozawa, F Sakuma, O Sasaki, T Tabaru, KH Tanaka, S Yamada, S Yokkaichi, Y Yoshimura, H En&apos;yo

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 516 ( 2-3 ) page: 390 - 405   2004.1

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    A spectrometer was constructed to measure the invariant mass spectra of rho, omega and phi mesons through their e(+)e(-) or K(+)K(-) decays. The KEK experiment E325 was successfully carried out using the new spectrometer, and observed the signature of an in-medium mass modification of the rho and/or omega mesons for the first time. The details of the spectrometer are described. (C) 2003 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2003.08.168

    Web of Science

  172. Beam splitting etalons with a spacing of 189μm thickness

    M.Kitaguchi, H.Funahashi, K.Taketani, M.Hino, S.Tasaki, R.Maruyama, Y.Otake, H.M.Shimizu

    Activity report on neutron scattering research   Vol. 11   page: 219 - 0   2004

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  173. Non-dispersive measurement of the transverse coherence length of a cold neutron beam Reviewed

    M Kitaguchi, H Funahashi, T Nakura, K Taketani, M Hino, Y Otake, HM Shimizu

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 72 ( 12 ) page: 3079 - 3081   2003.12

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    We have measured the transverse coherence length of a cold neutron beam using Jamin-type cold neutron spin interferometer. It can control the transverse shift between the superposed two paths with no dispersion. We have observed clearly that the contrast of interference fringes varies according to the coherence function determined by the collimation of the beam. The measured coherence length was consistent with the estimate by the standard deviation of the neutron transverse momentum distribution.

    DOI: 10.1143/JPSJ.72.3079

    Web of Science

  174. Direct Measurement of the Transverse Coherence Length of Cold Neutron Beam Reviewed

    Masaaki Kitaguchi, Haruhiko Funahashi, Terunao Nakura, Masahiro Hino, Hirohiko M. Shimizu

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   Vol. 72   page: 38 - 41   2003.11

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    We have developed new cold-neutron interferometer of Jamin-type. Clear interference fringes with the contrast of 60% were observed. This is the first success of neutron interferometer using four independent multilayer mirrors. By using this new interferometer, we have measured the transverse coherence length of cold neutron beam directly. The transverse dislocation between the two paths can be controlled with no dispersion. The measured coherence length was consistent with the estimate given by the transverse momentum distribution of incident beam.

    DOI: 10.1143/JPSJS.72SC.38

    Web of Science

  175. Measurement of invariant mass spectra of vector meson decaying in nuclear matter Reviewed

    M Naruki, J Chiba, H En'yo, H Funahashi, H Hamagaki, M Ieiri, M Ishino, H Kanda, M Kitaguchi, S Mihara, T Miyashita, T Murakami, R Muto, M Nomachi, K Ozawa, F Sakuma, O Sasaki, HD Sato, M Sekimoto, T Tabaru, KH Tanaka, S Yadama, S Yokkaichi, Y Yoshimura

    NUCLEAR PHYSICS A   Vol. 721   page: 297C - 300C   2003.6

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    The experiment E325 has been performed at KEK PS. The data taking has been completed on February 2002. We have measured the invariant mass spectrum of e(+)e(-)pairs based on the statistics 100 times larger than our previous publication[3]. On the low-mass side of rho/omega meson, an enhancement over the known hadronic sources has been observed. The obtained rho/omega ratio in the spectrum is smaller than the ratio in pp interaction. This suggests that rho meson mass has been modified in nuclear matter.

    DOI: 10.1016/S0375-9474(03)01054-6

    Web of Science

  176. Cold-neutron interferometer of the Jamin type Reviewed

    M Kitaguchi, H Funahashi, T Nakura, M Hino, HM Shimizu

    PHYSICAL REVIEW A   Vol. 67 ( 3 ) page: 033609   2003.3

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    A cold-neutron interferometer using four independent multilayer mirrors is demonstrated. We have observed interference fringes with a contrast of 60%. The interferometer is based on a pair of devices using etalons with an air gap of 9.75 mum in spacing. The optical system is equivalent to the Jamin-type interferometer, which allows much larger spatial separation between the two coherent beams than the previous type of multilayer interferometer to broaden the applicability of neutron interferometry.

    DOI: 10.1103/PhysRevA.67.033609

    Web of Science

  177. Measurement of invariant mass spectra of vector meson decaying in nuclear matter at KEK-PS Reviewed

    R Muto, J Chiba, H En'yo, Y Fukao, H Funahashi, H Hamagaki, M Ieiri, M Ishino, H Kanda, M Kitaguchi, A Mihara, K Miwa, T Miyashita, T Murakami, T Nakura, M Naruki, M Nomachi, K Ozawa, F Sakuma, O Sasaki, M Sekimoto, T Tabaru, KH Tanaka, M Togawa, S Yamada, S Yokkaichi, Y Yoshimura

    INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS   Vol. 698   page: 138 - 141   2003

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:AMER INST PHYSICS  

    We measured invariant mass spectra of e(+)e(-) pairs produced in 12-GeV p + A interaction to investigate in-medium mass modification of vector mesons. We observed the excess over the known hadronic sources below the omega meson mass peak. The obtained rho/omega ratio and velocity dependence of excess/omega ratio imply that this excess mainly results from p meson whose miss was modified in nuclear matter.

    Web of Science

  178. Direct measurement of the transverse coherence length of cold neutron beam

    M.Kitaguchi, H.Funahashi, T.Nakura, K.Taketani, M.Hino, H.M.Shimizu

    Activity report on neutron scattering research   Vol. 10   page: 259 - 0   2003

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  179. Novel interferometer for cold neutrons using a pair of etalons Reviewed

    M. Kitaguchi, H. Funahashi, T. Nakura, M. Hino, H.M. Shimizu

    Nuclear Physics A   Vol. 721   page: 481c-484c   2003

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    DOI: 10.1016/S0375-9474(03)01104-7

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MISC 296

  1. Development of Cold Neutron Interferometer using Broadband Multilayer Mirrors

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

    日本中性子科学会年会講演概要集   Vol. 23rd   2023

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    J-GLOBAL

  2. Angular correlation between neutron spin and γ-ray mementum in <sup>139</sup>La(n,γ)<sup>140</sup>La<sup>*</sup> reactions

    奥泉舞桜, 奥平琢也, 奥平琢也, 伊東佑起, 遠藤駿典, 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, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 78 ( 1 )   2023

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    J-GLOBAL

  3. Utilization of Polarized Neutrons at J-PARC MLF BL04 ANNRI

    奥泉舞桜, 奥平琢也, 奥平琢也, 猪野隆, 遠藤駿典, 遠藤駿典, 奥隆之, 奥隆之, 加倉井和久, 河村しほり, 河村しほり, 北口雅暁, 木村敦, AUTON Clayton, AUTON Clayton, 後藤優, 小林龍珠, 小林龍珠, 高田秀佐, 高田秀佐, 高橋慎吾, 高橋慎吾, 清水裕彦

    日本中性子科学会年会講演概要集   Vol. 23rd   2023

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    J-GLOBAL

  4. Determination of the partial neutron width of 0.88 eV p-wave resonance of <sup>81</sup>Br for study of the systematics in parity-mixing nuclear matrix elements

    吉川大幹, 遠藤駿典, 遠藤駿典, 奥平琢也, 奥平琢也, 河村しほり, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 西村岳太郎, 藤岡宏之, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   Vol. 78 ( 1 )   2023

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    J-GLOBAL

  5. Plan for the T-violation search using compound nuclei and measurement of the spin-dependent neutron absorption cross section with polarized nuclei

    奥平琢也, 奥平琢也, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 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, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 77 ( 1 )   2022

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  6. Development of Pulsed Neutron Interferometer using Multilayer mirror for High Sensitivity Measurement

    藤家拓大, 藤家拓大, 日野正裕, 細畠拓也, 市川豪, 北口雅暁, 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(CD-ROM)   Vol. 77 ( 2 )   2022

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  7. Neutron Reflection Measurement by Magnetic Gradient Mirror for Lossless Transport of Cold Neutrons

    河村しほり, 藤家拓大, 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(CD-ROM)   Vol. 77 ( 1 )   2022

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  8. Current status of Neutron Nuclear Scattering Length Measurement using Pulsed Neutron Interferometer

    藤家拓大, 藤家拓大, 日野正裕, 細畠拓也, 市川豪, 北口雅暁, 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(CD-ROM)   Vol. 77 ( 1 )   2022

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  9. Derivation of neutron partial width of 3.91 eV p-wave resonance in <sup>105</sup>Pd(n,γ) <sup>106</sup>Pd reaction

    吉川大幹, 遠藤駿典, 遠藤駿典, 奥平琢也, 奥平琢也, 河村しほり, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 藤岡宏之, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   Vol. 77 ( 2 )   2022

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    J-GLOBAL

  10. Measurement of the circular polarization of γ-rays from the <sup>139</sup>La(n,γ) <sup>140</sup>La reaction

    遠藤駿典, 遠藤駿典, 奥平琢也, 亀田健斗, 河村しほり, 北口雅暁, 木村敦, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 藤岡宏之, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 77 ( 2 )   2022

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    J-GLOBAL

  11. Prompt γ-ray measurement from the neutron capture reaction of Pd isotopes in the eV energy range

    吉川大幹, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 遠藤駿典, 奥平琢也, 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, 藤家拓大, 藤岡宏之, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   Vol. 77 ( 1 )   2022

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  12. The angular dependence of the cross section of <sup>115</sup>In(n, γ) reaction toward a search for time-reversal violation using an indium target.

    高田秀佐, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 遠藤駿典, 奥隆之, 奥平琢也, 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, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 77 ( 1 )   2022

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  13. Branching ratio measurement of prompt gamma-rays from the compound resonances to the low lying states.

    広田克也, 安部亮太, 石崎貢平, 猪野隆, 遠藤駿典, 遠藤駿典, 奥平琢也, 奥隆之, 木村敦, 北口雅暁, 古賀淳, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 谷結以花, 長谷川拓郎, 藤岡宏之, 堀田大稀, 山本知樹, 吉岡瑞樹, 吉川大幹

    量子ビームサイエンスフェスタ(Web)   Vol. 2020   2021

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  14. Development of Pulsed Neutron Interferometry using Multilayer Mirror

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

    日本物理学会講演概要集(CD-ROM)   Vol. 76 ( 1 )   2021

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  15. Measurement of angular dependent term of <sup>139</sup>La(n,γ) reaction for polarized neutrons

    安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 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, 中井飛翔, 広田克也, 藤家拓大, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 76 ( 2 )   2021

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  16. AXELATOON~ACTIVITIES FOR MAKING ACCELERATORS IN KOSEN

    大谷将士, 阿部優樹, 岩下芳久, 大塚崇光, 岡田貴文, 奥村紀浩, 小野寺礼尚, 加藤清考, 北口雅暁, 高橋将太, 高梨宇宙, 高橋光太郎, 竹谷篤, 内藤富士雄, 服部綾佳, 広田克也, 古坂道弘, 三宅晶子, 山口孝明, 渡邊康

    日本加速器学会年会(Web)   Vol. 18th   2021

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  17. Present status of time-reversal violation search experiment with compound nuclei

    北口雅暁, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 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, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 76 ( 2 )   2021

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  18. Study of epithermal neutron optics for time-reversal violation search experiment with compound nuclei

    藤家拓大, 藤家拓大, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 遠藤駿典, 奥平琢也, 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

    日本物理学会講演概要集(CD-ROM)   Vol. 76 ( 2 )   2021

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  19. Measurement of the Spatial Distribution of Quantized Ultracold Neutrons in the Earth’s Gravitational Field by a High Spatial Resolution Detector using Nuclear Emulsion

    武藤直人, ABELE Hartmut, 有賀智子, 日野正裕, 広田克也, 広田克也, 市川豪, 市川豪, JENKE Tobias, 河原宏晃, 川崎真介, 北口雅曉, 北口雅曉, MICKO Jakob, 三島賢二, 三島賢二, 長縄直崇, 長縄直崇, 中村光廣, 中村光廣, 中村光廣, ROCCIA Stephanie, 佐藤修, 佐藤修, SEDMIK Rene I. P., 關義親, 清水裕彦, 清水裕彦, 多田智美, 梅本篤宏, 梅本篤宏

    日本写真学会誌   Vol. 84 ( 4 )   2021

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  20. Measurement of polarization dependence for capture cross-section of <sup>117</sup>Sn(<span style=text-decoration:overline>→n</span>,γ) reaction

    遠藤駿典, 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, 中井飛翔, 広田克也, 藤家拓大, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 76 ( 2 )   2021

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  21. Measurement of the γ-ray angular distribution in <sup>131</sup>Xe(n,γ)<sup>132</sup>Xe<sup>*</sup> reactions

    奥平琢也, 奥平琢也, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 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, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 76 ( 2 )   2021

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  22. Neutron lifetime measurement at J-PARC/BL05: Installation of a large Spin Flip Chopper

    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(CD-ROM)   Vol. 76 ( 1 )   2021

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  23. Neutron lifetime measurement at J-PARC/BL05: Present state of the neutron lifetime analysis

    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(CD-ROM)   Vol. 76 ( 1 )   2021

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  24. Neutron lifetime measurement at J-PARC/BL05: Investigation of background events caused by neutron gas scattering

    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(CD-ROM)   Vol. 76 ( 1 )   2021

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  25. Neutron lifetime measurement at J-PARC/BL05: Upgrade of simulation

    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(CD-ROM)   Vol. 76 ( 1 )   2021

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  26. Neutron lifetime measurement at J-PARC/BL05: Analysis of low pressure measurement to reduce gas induced background

    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(CD-ROM)   Vol. 76 ( 2 )   2021

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  27. Neutron lifetime measurement at J-PARC/BL05: Installation of a large neutron optical system and status of the highstatics run

    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(CD-ROM)   Vol. 76 ( 2 )   2021

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  28. Detailed measurement of wavelength-time-of-flight correlation of pulsed neutron sources in J-PARC

    清水春樹, 長谷川拓郎, 広田克也, 市川豪, 猪野隆, 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(CD-ROM)   Vol. 76 ( 1 )   2021

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  29. Precise measurement of the correlation between the wavelength and time-of-flight at J-PARC pulsed neutron source

    清水春樹, 長谷川拓郎, 市川豪, 猪野隆, 北口雅暁, 松崎俊, 三島賢二, 茂木駿紀, 藤家拓大

    日本物理学会講演概要集(CD-ROM)   Vol. 76 ( 2 )   2021

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  30. Neutron lifetime measurement at J-PARC/BL05: Classification of background events caused by neutron gas scattering

    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(CD-ROM)   Vol. 76 ( 1 )   2021

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  31. Evaluation of resonance parameters of compound nuclear states in the n+<sup>131</sup>Xe reaction

    亀田健斗, 安部亮太, 石崎貢平, 伊東佑起, 遠藤駿典, 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, 中井飛翔, 広田克也, 藤家拓大, 藤家拓大, 藤岡宏之, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 76 ( 2 )   2021

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

    松下 琢, Sonnenschein Volker, 井口 哲夫, 伊藤 大介, 北口 雅暁, 鬼柳 善明, Guo Wei, 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 : Neutron network news   Vol. 30 ( 4 ) page: 192 - 196   2020.11

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    CiNii Books

  33. Analysis reports of p-wave resonance distribution caused by <sup>111</sup>Cd(n,γ)reactions for time reversal violation search experiment

    牧瀬壮, 石崎貢平, 遠藤駿典, 奥平琢也, 北口雅暁, 木村敦, 古賀淳, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 谷結以花, 新實裕大, 広田克也, 藤岡宏之, 山本知樹, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 75 ( 1 )   2020

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  34. Study of <sup>131</sup>Xe(n,γ) reaction via compound nuclear state for T-violation search

    谷結以花, 石崎貢平, 遠藤駿典, 奥平琢也, 北口雅暁, 木村敦, 古賀淳, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 新實裕大, 広田克也, 藤岡宏之, 牧瀬壮, 山本知樹, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 75 ( 1 )   2020

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  35. Test of nanoparticle target for study of new intermediate range interaction by means of neutron coherent scattering

    廣本政之, HADDOCK Christopher C., 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, SNOW W. Michael, 吉岡瑞樹, 原周平

    日本物理学会講演概要集(CD-ROM)   Vol. 75 ( 1 )   2020

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  36. Performance of a detector for new intermediate range interaction by means of neutron coherent scattering

    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, HADDOCK Christopher C., 猪野隆, 三島賢二, SNOW W.Michael, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   Vol. 75 ( 1 )   2020

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  37. Development of waveform analysis method for high-precision test of the time-reversal symmetry via the compound process of the neutron resonance reaction

    吉川大幹, 石崎貢平, 遠藤駿典, 奥平琢也, 北口雅暁, 木村敦, 古賀淳, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 谷結以花, 新實裕大, 広田克也, 藤家拓大, 藤岡宏之, 牧瀬壮, 山本知樹, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   Vol. 75 ( 1 )   2020

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  38. The progress of polarized target study for the search of T-violation in the neutron resonant capture in 2019

    Ishizaki K., Iinuma M., Ikeda Y., Ikegami H., Ishiguro R., Ishimoto S., Ide I., Ino T., Iwata T., Uesaka T., Otomo T., Oku T., Kanda H., Kitaguchi M., Kohri H., Shima T., Shimizu H. M., Takahashi D., Takahashi Y., Fujita M., Hotta D., matsushita T., Miura D., Miyachi Y., Yoshikawa H., Yosoi M., Wada N., NOPTREX collaboration

    Meeting Abstracts of the Physical Society of Japan   Vol. 75.1   page: 310 - 310   2020

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    DOI: 10.11316/jpsgaiyo.75.1.0_310

  39. Development of nuclear polarized target for NOPTREX experiments-Measurement of spin-lattice relaxation in LaAlO<sub>3</sub>-

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

    日本物理学会講演概要集(CD-ROM)   Vol. 75 ( 2 )   2020

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  40. Development of the Model Describing Neutron Coherent Scattering by Extra-dimensional Gravity

    近藤亮太, 廣本政之, 堀太地, HADDOCK Christopher C., 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, SNOW W. Michael, 原周平, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   Vol. 75 ( 1 )   2020

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  41. Measurement and current status of analysis of the angular dependence of γ-rays emitted from <sup>117</sup>Sn(n, γ) reactions

    古賀淳, 石崎貢平, 遠藤駿典, 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, 谷結以花, 新實裕大, 広田克也, 藤岡宏之, 牧瀬壮, 山本知樹, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 75 ( 1 )   2020

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    J-GLOBAL

  42. Measurement result of an angular dependence of γ-rays emitted by the <sup>117</sup>Sn(n, γ) reactions and comparison with previous study

    古賀淳, 飯沼昌隆, 石崎貢平, 井出郁央, 遠藤駿典, 遠藤駿典, 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, 谷結以花, 新實裕大, 広田克也, 藤家拓大, 藤岡宏之, 山本知樹, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 75 ( 2 )   2020

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  43. Analysis of branching ratio of gamma-ray from In(n, γ) reaction for T-violation search using compound states

    高田秀佐, 飯沼昌隆, 石崎貢平, 井出郁央, 遠藤駿典, 奥平琢也, 北口雅暁, 木村敦, 古賀淳, 酒井健二, 嶋達志, 清水裕彦, 谷結以花, 新實裕大, 広田克也, 藤家拓大, 藤岡宏之, 山本知樹, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 75 ( 2 )   2020

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  44. Neutron lifetime measurement at J-PARC/BL05: Analysis of division between the neutron β decay and the reaction of neutron with <sup>3</sup>He

    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(CD-ROM)   Vol. 75 ( 2 )   2020

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  45. Neutron lifetime measurement at J-PARC/BL05: Estimation of background and systematic errors

    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(CD-ROM)   Vol. 75 ( 1 )   2020

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  46. Neutron lifetime measurement at J-PARC BL05: SFC upgrade

    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(CD-ROM)   Vol. 75 ( 1 )   2020

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  47. Neutron lifetime measurement at J-PARC/BL05: Verification of background systematic errors using MC

    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(CD-ROM)   Vol. 75 ( 2 )   2020

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  48. Neutron lifetime measurement at J-PARC/BL05: Measurement result until 2019

    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(CD-ROM)   Vol. 75 ( 2 )   2020

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  49. Neutron lifetime measurement at J-PARC/BL05: Estimation of content rate of <sup>3</sup>He in TPC operating gas

    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(CD-ROM)   Vol. 75 ( 1 )   2020

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  50. Unknown Interaction Search with Neutron Diffraction

    藤家拓大, 藤家拓大, 清水裕彦, 広田克也, 北口雅暁, 山形豊, 細畠拓也, 竹田真宏, HEACOCK Benjamin, HUBER Michael, YOUNG Albert, VALDILLEZ Robert

    日本物理学会講演概要集(CD-ROM)   Vol. 75 ( 2 )   2020

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  51. Measurement of the total neutron scattering cross section ratios of noble gases of natural isotopic composition using a pulsed neutron beam

    Christopher C. Haddock, Masayuki Hiromoto, Katsuya Hirota, Takashi Ino, Masaaki Kitaguchi, Kenji Mishima, Noriko Oi, Tatsushi Shima, Hirohiko M. Shimizu, W. Michael Snow, Tamaki Yoshioka

        2019.6

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    Precision measurements of slow neutron cross sections with atoms have several<br />
    scientific applications. In particular the n-$^{4}$He s-wave scattering length<br />
    is important to know both for helping to constrain the nuclear three-body<br />
    interaction and for the proper interpretation of several ongoing slow neutron<br />
    experiments searching for other types of neutron-atom interactions. We present<br />
    new measurements of the ratios of the neutron differential scattering cross<br />
    sections for natural isotopic-abundance mixtures of the noble gases He, Ar, Kr,<br />
    and Xe to natural isotopic abundance Ne. These measurements were performed<br />
    using a recently developed neutron scattering apparatus for gas samples located<br />
    on a pulsed slow neutron beamline which was designed to search for possible<br />
    exotic neutron-atom interactions and employs both neutron time of flight<br />
    information and a position-sensitive neutron detector for scattering event<br />
    reconstruction. We found agreement with the literature values of scattering<br />
    cross sections inferred from Ar/Ne, Kr/Ne and Xe/Ne differential cross section<br />
    ratios over the $q$ range of $1 - 7$ nm$^{-1}$. However for the case of He/Ne<br />
    we find that the cross section inferred differs by 11.3% (7.6 $\sigma$) from<br />
    previously-reported values inferred from neutron phase shift measurements, but<br />
    is in reasonable agreement with values from other measurements. The very large<br />
    discrepancy in the He/Ne ratio calls for a new precision measurement of the<br />
    n-$^{4}$He scattering length using neutron interferometry.

    arXiv

  52. Branching ratio measurement of prompt gamma-rays from the compound resonances to the low lying states.

    広田克也, 石崎貢平, 猪野隆, 遠藤駿典, 奥平琢也, 奥隆之, 木村敦, 北口雅暁, 古賀淳, 酒井健二, 佐藤匠, 嶋達志, 清水裕彦, 高田秀佐, 谷結以花, 藤岡宏之, 牧瀬壮, 山本知樹, 吉岡瑞樹, 吉川大幹

    量子ビームサイエンスフェスタ(Web)   Vol. 2018   2019

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  53. 時間反転対称性の破れの探索に向けた<sup>103</sup>Rhの(n,γ)反応の測定

    谷結以花, 藤岡宏之, 清水裕彦, 山本知樹, 石崎貢平, 遠藤駿典, 佐藤匠, 新實裕大, 北口雅暁, 古賀淳, 高田秀佐, 牧瀬壮, 吉岡瑞樹, 広田克也, 嶋達志, 吉川大幹, 奥平琢也, 木村敦, 酒井健二

    日本物理学会講演概要集(CD-ROM)   Vol. 74 ( 1 )   2019

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  54. 時間反転対称性の破れ探索に向けた<sup>81</sup>Br(n,γ)反応測定

    遠藤駿典, 清水裕彦, 北口雅暁, 山本知樹, 石崎貢平, 佐藤匠, 吉岡瑞樹, 高田秀佐, 古賀淳, 嶋達志, 広田克也, 吉川大幹, 藤岡宏之, 谷結以花, 奥平琢也, 酒井健二, 木村敦

    日本物理学会講演概要集(CD-ROM)   Vol. 74 ( 1 )   2019

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  55. 時間反転対称性の破れ探索のための複合核共鳴状態における<sup>111</sup>Cd及び<sup>113</sup>Cdの放出γ線角度分布測定

    牧瀬壮, 高田秀佐, 古賀淳, 吉岡瑞樹, 清水裕彦, 山本知樹, 石崎貢平, 遠藤駿典, 佐藤匠, 新實裕大, 北口雅暁, 広田克也, 嶋達志, 吉川大幹, 藤岡宏之, 谷結以花, 奥平琢也, 木村敦, 酒井健二

    日本物理学会講演概要集(CD-ROM)   Vol. 74 ( 1 )   2019

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  56. 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

    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(CD-ROM)   Vol. 74 ( 1 )   2019

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  57. 複合核過程における<sup>139</sup>La及び<sup>109</sup>Agのs波共鳴解析

    吉川大幹, 嶋達志, 清水裕彦, 広田克也, 山本知樹, 石崎貢平, 遠藤駿典, 遠藤駿典, 新實裕大, 北口雅暁, 高田秀佐, 古賀淳, 牧瀬壮, 吉岡瑞樹, 藤岡宏之, 谷結以花, 奥平琢也, 木村敦, 酒井健二

    日本物理学会講演概要集(CD-ROM)   Vol. 74 ( 2 )   2019

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    J-GLOBAL

  58. 超冷中性子リバンチャー2号機の性能評価実験結果

    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(CD-ROM)   Vol. 74 ( 2 )   2019

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  59. 複合核反応におけるCdの特定p波由来のγ線精密測定に関する研究

    牧瀬壮, 石崎貢平, 遠藤駿典, 奥平琢也, 北口雅暁, 木村敦, 古賀淳, 酒井健二, 嶋達志, 清水裕彦, 高田秀佐, 谷結以花, 新實裕大, 広田克也, 藤岡宏之, 山本知樹, 吉岡瑞樹, 吉川大幹

    日本物理学会講演概要集(CD-ROM)   Vol. 74 ( 2 )   2019

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  60. <sup>117</sup>Snの複合核反応における時間反転対称性の破れ探索に向けた実験感度に関する研究

    古賀淳, 高田秀佐, 牧瀬壮, 吉岡瑞樹, 清水裕彦, 山本知樹, 石崎貢平, 遠藤駿典, 佐藤匠, 新實裕大, 北口雅暁, 広田克也, 嶋達志, 吉川大幹, 藤岡宏之, 谷結以花, 奥平琢也, 木村敦, 酒井健二

    日本物理学会講演概要集(CD-ROM)   Vol. 74 ( 1 )   2019

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    J-GLOBAL

  61. 複合核共鳴状態における時間反転対称性の破れ探索実験のための<sup>127</sup>I(n,γ)測定

    佐藤匠, 清水裕彦, 山本知樹, 石崎貢平, 遠藤駿典, 新實裕大, 北口雅暁, 高田秀佐, 古賀淳, 牧瀬壮, 吉岡瑞樹, 広田克也, 嶋達志, 吉川大幹, 藤岡宏之, 谷結以花, 奥平琢也, 木村敦, 酒井健二

    日本物理学会講演概要集(CD-ROM)   Vol. 74 ( 1 )   2019

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  62. 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- International coauthorship

    廣本政之, HADDOCK Christopher C., 廣田克也, 猪野隆, 北口雅暁, 三島賢二, 嶋達志, 清水裕彦, SNOW W.Michael, 原周平, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   Vol. 74 ( 1 )   2019

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  63. 複合核共鳴を用いた時間反転対称性の破れ探索に向けた<sup>139</sup>La(n,γ)反応におけるs波共鳴解析

    吉川大幹, 嶋達志, 広田克也, 清水裕彦, 山本知樹, 石崎貢平, 遠藤駿典, 佐藤匠, 新實裕大, 北口雅暁, 高田秀佐, 古賀淳, 牧瀬壮, 吉岡瑞樹, 藤岡宏之, 谷結以花, 奥平琢也, 木村敦, 酒井健二

    日本物理学会講演概要集(CD-ROM)   Vol. 74 ( 1 )   2019

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  64. 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

    廣本政之, 堀太地, HADDOCK Christopher C., 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, SNOW W. Michael, 原周平, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   Vol. 74 ( 2 )   2019

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  65. Construction of the 2nd Beamline of Nagoya University Accelerator-driven Neutron Source (NUANS) Reviewed International journal

    Yusuke Tsuchikawa, Keisuke Abo, Daiki Furuzawa, Katsuya Hirota, Go Ichikawa, Sohei Imajo, Ikuya Ito, Yoshihisa Iwashita, Masaaki Kitaguchi, Yoshiaki Kiyanagi, Yasuhiko Miwata, Kazuya Sato, Hirohiko M. Shimizu, Hayato Takeshita, Kazuki Tsuchida, Yukio Tsurita, Akira Uritani, Kenichi Watanabe, Yutaka Yamagata, Atsushi Yamazaki, Sachiko Yoshihashi

    JPS Conf. Proc.   Vol. 22   page: 011024-1 - 011024-4   2018.11

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    DOI: 10.7566/JPSCP.22.011024

  66. 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

    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, HADDOCK Christopher, 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(CD-ROM)   Vol. 73 ( 2 ) page: ROMBUNNO.14pS12‐3   2018.9

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    J-GLOBAL

  67. 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

    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, HADDOCK Christopher, 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(CD-ROM)   Vol. 73 ( 2 ) page: ROMBUNNO.14pS12‐2   2018.9

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  68. 複合核共鳴の時間反転対称性の破れ―<sup>81</sup>Brの(n,γ)反応の角分布測定―

    伊藤維久弥, 清水裕彦, 広田克也, 奥平琢也, 大井法子, 山本知樹, 遠藤駿典, 佐藤匠, 石崎貢平, HADDOCK Christopher, 北口雅暁, 古賀淳, 高田秀佐, 吉岡瑞樹, 木村敦, 酒井健二

    日本物理学会講演概要集(CD-ROM)   Vol. 73 ( 1 ) page: ROMBUNNO.25pK309‐7   2018.3

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  69. 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

    高田秀佐, 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, HADDOCK Christopher, 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, 北口雅暁, 酒井健二

    日本物理学会講演概要集(CD-ROM)   Vol. 73 ( 1 ) page: ROMBUNNO.25pK309‐9   2018.3

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  70. 複合核共鳴の時間反転対称性の破れ―<sup>117</sup>Snの(n,γ)反応の角分布測定―

    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, 石崎貢平, HADDOCK Christopher, 北口雅暁, 木村敦, 酒井健二

    日本物理学会講演概要集(CD-ROM)   Vol. 73 ( 1 ) page: ROMBUNNO.25pK309‐6   2018.3

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  71. 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

    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(CD-ROM)   Vol. 73 ( 1 ) page: ROMBUNNO.23pK606‐6   2018.3

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  72. 中性子寿命測定のための光学系アップグレード

    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, 長倉直樹, 中野祐輔, 生出秀行, 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, 竹谷薫, 富田龍彦, 上原英晃, 山田崇人, 山下了, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   Vol. 73 ( 1 ) page: ROMBUNNO.23pPSA‐9   2018.3

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  73. Development of neutron spin filter for T violation search

    佐藤匠, 遠藤駿典, 石崎貢平, 伊藤維久弥, 山本知樹, 大井法子, 奥平琢也, HADDOCK Christopher, 北口雅暁, 広田克也, 清水裕彦, 古賀淳, 高田秀佐, 吉岡瑞樹, 木村敦, 酒井健二

    量子ビームサイエンスフェスタ(Web)   Vol. 2017   2018

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  74. 名古屋大学小型中性子源NUANSにおけるイメージングポートの構築

    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

    日本中性子科学会年会講演概要集   Vol. 18th   2018

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  75. 複合核反応における時間反転対称性の破れ探索実験に向けた研究

    古賀淳, 高田秀佐, 吉岡瑞樹, 清水裕彦, 広田克也, 北口雅暁, 山本知樹, 石崎貢平, 遠藤駿典, 佐藤匠, 新實裕大, 藤家拓大, 藤岡宏之, 谷結以花, 嶋達志, 吉川大幹, 奥平琢也, 酒井健二

    日本中性子科学会年会講演概要集   Vol. 18th   2018

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  76. 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

    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, HADDOCK Christopher, 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(CD-ROM)   Vol. 73 ( 2 )   2018

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  77. Generation of He<sub>2</sub><sup>*</sup> clusters via neutron-<sup>3</sup>He absorption reaction for flow visualization in superfluid <sup>4</sup>He III

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

    Meeting Abstracts of the Physical Society of Japan   Vol. 73 ( 0 ) page: 1687 - 1687   2018

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    DOI: 10.11316/jpsgaiyo.73.1.0_1687

  78. 複合核状態を用いた時間反転対称性の破れ探索計画

    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, HADDOCK Christopher, 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(CD-ROM)   Vol. 73 ( 2 )   2018

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  79. 複合核反応における時間反転対称性の破れ探索実験に向けた研究

    古賀淳, 高田秀佐, 吉岡瑞樹, 清水裕彦, 広田克也, 北口雅暁, 山本知樹, 石崎貢平, 遠藤駿典, 佐藤匠, 新實裕大, 藤家拓大, 藤岡宏之, 谷結以花, 嶋達志, 吉川大幹, 奥平琢也, 酒井健二

    日本中性子科学会年会講演概要集   Vol. 18th   2018

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  80. Angular distribution of prompt gamma-ray from the <sup>117</sup>Sn(n,γ) reaction

    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, 石崎貢平, 遠藤駿典, 佐藤匠, HADDOCK Christopher, 北口雅暁, 木村敦, 酒井健二

    量子ビームサイエンスフェスタ(Web)   Vol. 2017   2018

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  81. Measurement of parity violation of lanthanum-139 for the T-violation search in a compound nucleus

    山本知樹, 清水裕彦, 北口雅暁, 広田克也, HADDOCK Christopher, 奥平琢也, 大井法子, 伊藤維久弥, 石崎貢平, 遠藤駿典, 佐藤匠, 吉岡瑞樹, 高田秀佐, 古賀淳, 木村敦, 酒井健二, 奥隆之

    量子ビームサイエンスフェスタ(Web)   Vol. 2017   2018

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

    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, 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(CD-ROM)   Vol. 73 ( 2 )   2018

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  83. 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

    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(CD-ROM)   Vol. 73 ( 2 )   2018

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  84. Fundamental physics activities with pulsed neutron at J-PARC(BL05) Reviewed International journal

    Kenji Mishima, Shogo Awano, Yasuhiro Fuwa, Fumiya Goto, Christopher C. Haddock, Masahiro Hino, Masanori Hirose, Katsuya Hirota, Sei Ieki, Sohei Imajo, Takashi Ino, Yoshihisa Iwashita, Ryo Katayama, Hiroaki Kawahara, Masaaki Kitaguchi, Ryunosuke Kitahara, Jun Koga, Aya Morishita, Tomofumi Nagae, Naoki Nagakura, Naotaka Naganawa, Noriko Oi, Hideyuki Oide, Hidetoshi Otono, Yoshichika Seki, Daiichiro Sekiba, Tatsushi Shima, Hirohiko M. Shimizu, William M. Snow, Naoyuki Sumi, Hirochika Sumino, Satomi Tada, Kaoru Taketani, Seiji Tasaki, Tatsuhiko Tomita, Atsuhiro Umemoto, Takahito Yamada, Satoru Yamashita, Mami Yokohashi, Tamaki Yoshioka

        2017.12

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    &quot;Neutron Optics and Physics (NOP/ BL05)&quot; at MLF in J-PARC is a beamline for<br />
    studies of fundamental physics. The beamline is divided into three branches so<br />
    that different experiments can be performed in parallel. These beam branches<br />
    are being used to develop a variety of new projects. We are developing an<br />
    experimental project to measure the neutron lifetime with total uncertainty of<br />
    1 s (0.1%). The neutron lifetime is an important parameter in elementary<br />
    particle and astrophysics. Thus far, the neutron lifetime has been measured by<br />
    several groups; however, different values are obtained from different<br />
    measurement methods. This experiment is using a method with different sources<br />
    of systematic uncertainty than measurements conducted to date. We are also<br />
    developing a source of pulsed ultra-cold neutrons (UCNs) produced from a<br />
    Doppler shifter are available at the unpolarized beam branch. We are developing<br />
    a time focusing device for UCNs, a so called &quot;rebuncher&quot;, which can increase<br />
    UCN density from a pulsed UCN source. At the low divergence beam branch, an<br />
    experiment to search an unknown intermediate force with nanometer range is<br />
    performed by measuring the angular dependence of neutron scattering by noble<br />
    gases. Finally the beamline is also used for the research and development of<br />
    optical elements and detectors. For example, a position sensitive neutron<br />
    detector that uses emulsion to achieve sub-micrometer resolution is currently<br />
    under development. We have succeeded in detecting cold and ultra-cold neutrons<br />
    using the emulsion detector.

    DOI: 10.7566/JPSCP.22.011033

    arXiv

  85. 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

    奥平琢也, 清水裕彦, 北口雅暁, 広田克也, HADDOCK C, 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(CD-ROM)   Vol. 72 ( 2 ) page: ROMBUNNO.13pS22‐2   2017.9

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  86. 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

    遠藤駿典, 清水裕彦, 北口雅暁, 広田克也, 奥平琢也, 伊藤維久弥, 山本知樹, HADDOCK Christopher, 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(CD-ROM)   Vol. 72 ( 2 ) page: ROMBUNNO.13pS22‐6   2017.9

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  87. 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

    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, HADDOCK Christopher, 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(CD-ROM)   Vol. 72 ( 2 ) page: ROMBUNNO.13pS22‐4   2017.9

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  88. 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

    清水裕彦, Gudkov V, SNOW W. M, BOWMAN J. D, 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, 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, 山形豊

    日本物理学会講演概要集(CD-ROM)   Vol. 72 ( 2 ) page: ROMBUNNO.13pS22‐8   2017.9

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  89. 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―

    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, HADDOCK Christopher, 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(CD-ROM)   Vol. 72 ( 2 ) page: ROMBUNNO.13pS22‐3   2017.9

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  90. Time focus of ultracold neutrons by improved ultracold neutron rebuncher

    S. Imajo, Y. Iwashita, K. Mishima, M. Kitaguchi, H. M. Shimizu, T. Ino, S. Yamashita, K. Hirota, F. Goto, Y. Fuwa, R. Katayama

        page: 370 - 373   2017.8

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  91. 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

    遠藤駿典, 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, 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(CD-ROM)   Vol. 72 ( 1 ) page: ROMBUNNO.18pC‐PS‐24 - 356   2017.3

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    &lt;p&gt;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。&lt;/p&gt;

    J-GLOBAL

  92. 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

    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, 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(CD-ROM)   Vol. 72 ( 1 ) page: ROMBUNNO.18aK23‐6 - 300   2017.3

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    &lt;p&gt;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。&lt;/p&gt;

    J-GLOBAL

  93. 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―

    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, 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(CD-ROM)   Vol. 72 ( 1 ) page: ROMBUNNO.18aK23‐8 - 302   2017.3

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    &lt;p&gt;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。&lt;/p&gt;

    J-GLOBAL

  94. 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

    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, 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(CD-ROM)   Vol. 72 ( 1 ) page: ROMBUNNO.18aK23‐9 - 303   2017.3

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    &lt;p&gt;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。&lt;/p&gt;

    J-GLOBAL

  95. <sup>139</sup>Laの中性子共鳴吸収の断面積の測定

    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, 長元考介, 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, 木村敦, 日野正裕, 嶋達志, 山形豊

    日本物理学会講演概要集(CD-ROM)   Vol. 72 ( 1 ) page: ROMBUNNO.18pC‐PS‐28 - 360   2017.3

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    &lt;p&gt;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。&lt;/p&gt;

    J-GLOBAL

  96. 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

    清水裕彦, GUDKOV V, SNOW W.M, BOWMAN J.D, 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, 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, 山形豊

    日本物理学会講演概要集(CD-ROM)   Vol. 72 ( 1 ) page: ROMBUNNO.18aK23‐7 - 301   2017.3

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    &lt;p&gt;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。&lt;/p&gt;

    J-GLOBAL

  97. Development of high spatial resolution cold/ultracold neutron detector using fine-grained nuclear emulsion Reviewed International journal

    N. Naganawaa, S. Awano, M. Hino, M. Hirose, K. Hirota, H. Kawahara, M. Kitaguchi, K. Mishima, T. Nagae, H. M. Shimizu, S. Tada, S. Tasaki, A. Umemoto

    Proceedings of Science   Vol. 2017-January   2017.1

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    © Copyright owned by the author(s). 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 6 Li and 10 B. Those detectors were demonstrated their ability to detect cold and ultra-cold neutrons.

    Scopus

  98. Construction of the Nagoya University Accelerator-driven Neutron Source (NUANS)

    Tsuchikawa Y., Sato K., Shimizu H. M., Takeshita H., Tsuchida K., Tsurita Y., Hirota K., Furuzawa D., Miwata Y., Yamagata Y., Yamazaki A., Abo K., Yoshihashi S., Watanabe K., Ichikawa G., Ito I., Imajo S., Iwashita Y., Uritani A., Kitaguchi M., Kiyanagi Y.

    Meeting Abstracts of the Physical Society of Japan   Vol. 72 ( 0 ) page: 228 - 228   2017

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    DOI: 10.11316/jpsgaiyo.72.2.0_228

  99. 名古屋大学における静電陽子加速器を用いたホウ素中性子捕捉療法用中性子施設の現状

    鬼柳善明, 土田一輝, 釣田幸夫, 佐藤和也, 古澤大貴, 山崎淳, 吉橋幸子, 渡辺賢一, 瓜谷章, 恒吉達矢, 辻義之, 市川豪, 伊藤維久弥, 今城想平, 土川雄介, 広田克也, 北口雅暁, 清水裕彦

    日本加速器学会年会(Web)   Vol. 14th   2017

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  100. 名古屋大学中性子源NUANS2nd Beam Lineの構築

    広田克也, 土川雄介, 今城想平, 市川豪, 伊藤維久弥, 瓜谷章, 北口雅暁, 鬼柳善明, 清水裕彦, 土田一輝, 山崎淳, 吉橋幸子, 渡辺賢一, 岩下芳久, 山形豊

    日本中性子科学会年会講演概要集   Vol. 17th   2017

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  101. 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

    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(CD-ROM)   Vol. 72 ( 2 )   2017

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  102. Measurement of angular correlation of (n,gamma) reaction with polarized neutrons Reviewed

    T. Yamamoto, H. M. Shimizu, M. Kitaguchi, K. Hirota, T. Okudaira, S. Takada, A. Okada, T. Yoshioka, T. Ino, K. Sakai, K. Asahi, T. Momose, T. Iwata, M. Hino, T. Shima, Y. Yamagata

    Proceedings of Science   Vol. 2017-January   2017

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    © Copyright owned by the author(s). 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.

    Scopus

  103. Result of the Ultracold Neutron focus experiment by the UCN Rebuncher at J-PARC/MLF

    Imajo Sohei, Fuwa Yasuhiro, Katayama Ryo, NOP collaboration, Iwashita Yoshihisa, Mishima Kenji, Kitaguchi Masaaki, Shimizu Hirohiko M, Ino Takashi, Yamashita Satoru, Hirota Katsuya, Goto Fumiya

    Meeting Abstracts of the Physical Society of Japan   Vol. 72 ( 0 ) page: 77 - 77   2017

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  104. Neutron Lifetime Measurement at J-PARC/BL05 : Tests of the new detector and amplifier

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

    Meeting Abstracts of the Physical Society of Japan   Vol. 72 ( 0 ) page: 92 - 92   2017

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    &lt;p&gt;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。&lt;/p&gt;

  105. Neutron Lifetime Measurement at J-PARC/BL05 : Development of the amplifier

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

    Meeting Abstracts of the Physical Society of Japan   Vol. 72 ( 0 ) page: 73 - 73   2017

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  106. Neutron lifetime measurement at J-PARC/BL05 : Performance evaluation of large acceptance neutron optics

    Yokohashi Mami, Yamashita Satoru, Seki Yoshichika, Oide Hideyuki, Mishima Kenji, Taketani Kaoru, Ino Takashi, Hirota Katsuya, Shimizu Hirohiko, Kitaguchi Masaaki, Kitahara Ryunosuke, Iwashita Yoshihisa, Yoshioka Tamaki, Otono Hidetoshi, Yamada Takahito

    Meeting Abstracts of the Physical Society of Japan   Vol. 72 ( 0 ) page: 63 - 63   2017

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    &lt;p&gt;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。&lt;/p&gt;

  107. Measurement of neutron lifetime at J-PARC/BL05 : The analysis result of neutron capture gamma rays

    Koga Jun, Yamada Takahito, Ieki Sei, Nagakura Naoki, Yamashita Satoru, Seki Yoshichika, Sumino Hirochika, Shimizu Hirohiko M, Hirota Katsuya, Okudaira Takuya, Yokohashi Mami, Sumi Naoyuki, Kitaguchi Masaaki, Mishima Kenji, Ino Takashi, Taketani Kaoru, Kimura Atsushi, Oide Hideyuki, Shima Tatsushi, Takada Shusuke, Tomita Tatsuhiko, Morishita Aya, Otono Hidetoshi, Yoshioka Tamaki, Kitahara Ryunosuke, Iwashita Yoshihisa

    Meeting Abstracts of the Physical Society of Japan   Vol. 72 ( 0 ) page: 64 - 64   2017

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    &lt;p&gt;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。&lt;/p&gt;

  108. 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

    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(CD-ROM)   Vol. 72 ( 2 )   2017

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  109. Measurement of neutron lifetime at J-PARC/BL05 : Estimation of backgrounds

    Ieki Sei, Kitaguchi Masaaki, Yoshioka Tamaki, Otono Hidetoshi, Tomita Tatsuhiko, Sumi Naoyuki, Morishita Aya, Koga Jun, Iwashita Yoshihisa, Kitahara Ryunosuke, Oide Hideyuki, Yamada Takahito, Shima Tatsushi, Mishima Kenji, Ino Takashi, Taketani Kaoru, Nagakura Naoki, Yamashita Satoru, Seki Yoshichika, Sumino Hirochika, Shimizu Hirohiko M, Hirota Katsuya, Yokohashi Mami

    Meeting Abstracts of the Physical Society of Japan   Vol. 72 ( 0 ) page: 65 - 65   2017

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    &lt;p&gt;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。&lt;/p&gt;

  110. 中性子吸収反応の複合核状態からのガンマ線放出角分布

    石崎貢平, 伊藤維久弥, 山本知樹, 大井法子, 奥平琢也, HADDOCK Chris, 北口雅暁, 広田克也, 清水裕彦, 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, 古賀淳, 高田秀佐, 吉岡瑞樹, 嶋達志, 山形豊

    日本中性子科学会年会講演概要集   Vol. 17th   page: 94   2017

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  111. Development of Ultracold Neutron Accelerator for Time focusing of Pulsed Neutrons Reviewed International journal

    S. Imajo, Y. Iwashita, K. Mishima, M. Kitaguchi, H. M. Shimizu, T. Ino, S. Yamashita

    Proceedings of the 28th Linear Accelerator Conference (LINAC2016)     page: 56 - 58   2016.10

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  112. Present status of Ultracold Neutron Rebuncher

    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

    第13回日本加速器学会年会,幕張メッセ     page: 323 - 326   2016.8

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  113. 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

    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(CD-ROM)   Vol. 71 ( 1 ) page: ROMBUNNO.22PAX‐4   2016.3

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  114. 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―

    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, GUDKOV V. P, SNOW W. M, PLASTER B, BOWMAN J. D, 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(CD-ROM)   Vol. 71 ( 1 ) page: ROMBUNNO.22PAX‐1   2016.3

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  115. 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

    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 第71回年次大会, 東北学院大     2016.3

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  116. J-PARC/BL05における中性子寿命測定実験 : 新検出器開発

    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 第71回年次大会, 東北学院大     2016.3

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  117. J-PARC/BL05における中性子寿命測定実験 : 大型Spin Flip Chopper開発

    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 第71回年次大会, 東北学院大     2016.3

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  118. 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

    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 第71回年次大会, 東北学院大     2016.3

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  119. 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

    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 第71回年次大会, 東北学院大     2016.3

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  120. 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

    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 第71回年次大会, 東北学院大     2016.3

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  121. 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

    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 第71回年次大会, 東北学院大     2016.3

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  122. J-PARC/BL05における中性子寿命測定実験 : 2014/2015年データ解析

    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 第71回年次大会, 東北学院大     2016.3

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  123. Performance test of the Ultracold Neutron Rebuncher

    Imajo Sohei, Iwashita Yoshihisa, Mishima Kenji, Kitaguchi Masaaki, Shimizu Hirohiko M, Ino Takashi, Yamashita Satoru, NOP collaboration

    Meeting Abstracts of the Physical Society of Japan   Vol. 71 ( 0 ) page: 64 - 64   2016

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    &lt;p&gt;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。&lt;/p&gt;

  124. 22pAX-2 Search for CP-violation effects in compound neutron resonance : current status and future prospect

    Kitaguchi M, Shimizu H. M, Hirota K, Ichikawa G, Okudaira T, Okada A, Goto F, Nagamoto K, Takada H, Yoshioka T, Ino T, Asahi K, Momose T, Iwata T, Sakai K, Hino M, Shima T, Yamagata Y

    Meeting Abstracts of the Physical Society of Japan   Vol. 71 ( 0 )   2016

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)   Publisher:The Physical Society of Japan  

  125. 22pAX-8 Simulation of Cluster type Ge detector for CP-violation search in Compound nucleus

    Takada S, Yoshioka T, Okada A, Okudaira T, Goto H, Shimizu H, Nagamoto K, Hirota K, Kitaguchi M, Kimura A

    Meeting Abstracts of the Physical Society of Japan   Vol. 71 ( 0 )   2016

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  126. Measurement of neutron scattering with noble gas to search for a short-range unknown force at J-PARC International coauthorship

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

    Meeting Abstracts of the Physical Society of Japan   Vol. 71 ( 0 ) page: 256 - 256   2016

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    &lt;p&gt;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。&lt;/p&gt;

  127. J-PARC/BL05における中性子寿命測定実験:入射ビーム光学系の開発

    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(CD-ROM)   Vol. 71 ( 2 )   2016

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  128. Measurement of neutron lifetime at J-PARC/BL05 : Signal Identification

    Ieki Sei, Kitaguchi Masaaki, Yoshioka Tamaki, Otono Hidetoshi, Tomita Tatsuhiko, Sumi Naoyuki, Morishita Aya, Iwashita Yoshihisa, Kitahara Ryunosuke, Oide Hideyuki, Shima Tatsushi, Yamada Takahito, Mishima Kenji, Ino Takashi, Taketani Kaoru, Nagakura Naoki, Yamashita Satoru, Seki Yoshichika, Sumino Hirochika, Shimizu Hirohiko, Hirota Katsuya, Yokohashi Mami

    Meeting Abstracts of the Physical Society of Japan   Vol. 71 ( 0 ) page: 60 - 60   2016

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    &lt;p&gt;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。&lt;/p&gt;

  129. Measurement of angular correlations in the (n, γ) reaction for T Violation Search Reviewed

    T. Okudaira, H. M. Shimizu, M. Kitaguchi, K. Hirota, S. Takada, T. Yamamoto, A. Okada, T. Yoshioka, T. Ino, K. Sakai, K. Asahi, T. Momose, T. Iwata, M. Hino, T. Shima, Y. Yamagata

    Proceedings of Science   Vol. 2016-September   2016

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    © Copyright owned by the author(s). 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 139La 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 139La was obtained.

    Scopus

  130. Measurement of <sup>14</sup>N(n,p)<sup>14</sup>C cross section using cold neutron beam at J-PARC/MLF/BL05

    Kitahara Ryunosuke, Sumi Naoyuki, Tomita Tatsuhiko, Yamashita Toru, Nagakura Naoki, Ieki Sei, Yamada Takahito, Shima Tatsushi, Seki Yoshichika, Oide Hideyuki, Mishima Kenji, Iwashita Yoshihisa, Taketani Kaoru, Ino Takashi, Shimizu Hirohiko, Hirota Katsuya, Yokohashi Mami, Kitaguchi Masaaki, Yoshioka Tamaki, Otono Hidetoshi, Morishita Aya

    Meeting Abstracts of the Physical Society of Japan   Vol. 71 ( 0 ) page: 174 - 174   2016

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    &lt;p&gt;^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。&lt;/p&gt;

  131. Neutron lifetime measurement at J-PARC/BL05: Systematic uncertainties and result

    Yamada Takahito, Yoshioka Tamaki, Otono Hidetoshi, Tomita Tatsuhiko, Sumi Naoyuki, Morishita Aya, Iwashita Yoshihisa, Kitahara Ryunosuke, Oide Hideyuki, Shima Tatsushi, Mishima Kenji, Ieki Sei, Ino Takashi, Taketani Kaoru, Seki Yoshichika, Nagakura Naoki, Yamashita Satoru, Sumino Hirochika, Shimizu Hirohiko M, Hirota Katsuya, Yokohashi Mami, Kitaguchi Masaaki

    Meeting Abstracts of the Physical Society of Japan   Vol. 71 ( 0 ) page: 61 - 61   2016

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    &lt;p&gt;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。&lt;/p&gt;

  132. Neutron lifetime measurement at J-PARC/BL05 : Development of large acceptance neutron optics

    Yokohashi Mami, Yamashita Satoru, Seki Yoshichika, Oide Hideyuki, Mishima Kenji, Taketani Kaoru, Ino Takashi, Hirota Katsuya, Shimizu Hirohiko, Kitaguchi Masaaki, Kitahara Ryunosuke, Iwashita Yoshihisa, Yoshioka Tamaki, Otono Hidetoshi, Yamada Takahito

    Meeting Abstracts of the Physical Society of Japan   Vol. 71 ( 0 ) page: 79 - 79   2016

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    &lt;p&gt;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。&lt;/p&gt;

  133. 重力起因位相測定のための多層膜中性子干渉計の開発

    SEKI YOSHICHIKA, KITAGUCHI MASAAKI, HINO MASAHIRO, SHIMIZU HIROHIKO

    日本物理学会講演概要集(CD-ROM)   Vol. 70 ( 1 ) page: ROMBUNNO.21ADL-4   2015.3

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    J-GLOBAL

  134. 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

    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(CD-ROM)   Vol. 70 ( 1 ) page: ROMBUNNO.21PDF-11   2015.3

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    J-GLOBAL

  135. 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

    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(CD-ROM)   Vol. 70 ( 1 ) page: ROMBUNNO.21ACE-11   2015.3

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    J-GLOBAL

  136. 21aCE-12 Measurement and analysis of partial wave mixing for CP-violation search in compound neutron resonance

    Hirota K, Kitaguchi M, Shimizu H. M, Ichikawa G, Sugino T, Sakai K, Kimura A, Harada H, Ino T

    Meeting Abstracts of the Physical Society of Japan   Vol. 70 ( 0 )   2015

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  137. 26pSG-8 Neutron lifetime measurement at J-PARC/BL05 : Development of the detector

    SUMI NAOYUKI, TOMITA TATSUHIKO, OTONO HIDETOSHI, YOSHIOKA TAMAKI, KITAHARA RYUNOSUKE, IWASHITA YOSHIHISA, YAMADA TAKAHITO, YAMASHITA SATORU, HIROTA KATSUYA, SHIMIZU HIROHIKO, KITAGUCHI MASAAKI, OIDE HIDEYUKI, SHIMA TATSUSHI, MISHIMA KENJI, TAKETANI KAORU, INO TAKASHI

    Meeting Abstracts of the Physical Society of Japan   Vol. 70 ( 0 )   2015

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  138. 21aDL-3 Neutron lifetime measurement at J-PARC/BL05 : Systematic uncertainties 2014

    Kitahara Ryunosuke, Higashi Nao, Yokoyama Harumichi, Sumino Hirochika, Yamashita Satoru, Tanaka Genki, Sumi Naoyuki, Otono Hidetoshi, Yoshioka Tamaki, Oide Hidetoshi, Seki Yoshichika, Iwashita Yoshihisa, Mishima Kenji, Taketani Kaoru, Ino Takashi, Shima Tatsushi, Sakakibara Risa, Sugino Tomoaki, Hirota Katsuya, Shimizu Hirohiko M, Kitaguchi Masaaki, Yamada Takahito, Katayama Ryo

    Meeting Abstracts of the Physical Society of Japan   Vol. 70 ( 0 )   2015

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  139. 21aDL-2 Neutron lifetime measurement at J-PARC/BL05 : Data analysis 2014

    Sumi N, Yokoyama H, Sumino H, Yamashita S, Sakakibara R, Sugino T, Hirota K, Shimizu H, Kitaguchi M, Oide H, Seki Y, Tanaka G, Shima T, Mishima K, Taketani K, Ino T, Otono H, Yoshioka T, Kitahara R, Iwashita Y, Yamada T, Katayama R, Azuma N

    Meeting Abstracts of the Physical Society of Japan   Vol. 70 ( 0 )   2015

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  140. J-PARC/BL05における中性子寿命測定実験の現状

    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(CD-ROM)   Vol. 70 ( 1 )   2015

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  141. Development of Slow neutron Accelerator for Rebunching Pulsed Neutrons International journal

    S. Imajo, Y. Iwashita, Y. Fuwa, R. Kitahara, H. M. Shimizu, M. Kitaguchi, K. Mishima, T. Ino

    Proceedings of the 27th Linear Accelerator Conference (LINAC 14)     page: 1062 - 1064   2014.9

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  142. Improvement of The Ultracold Neutrons Rebuncher II

    S. Imajo, Y. Iwashita, Y. Fuwa, R. Kitahara, H. M. Shimizu, M. Kitaguchi, K. Mishima, T. Ino

        page: 947 - 950   2014.8

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  143. Numerical simulation of BL06 neutron beamline for "VIN ROSE" at J-PARC/MLF (The 12th International Conference on Radiation Shielding (ICRS-12) and the 17th Topical Meeting of the Radiation Protection and Shielding Division of ANS (RPSD-2012)) -- (Accelerator Facilities)

    Progress in nuclear science and technology   Vol. 4   page: 214 - 217   2014.4

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  144. 30pAB-5 Current status and perspective of VIN ROSE at BL06 at J-PARC/MLF

    Hino M, Oda T, Endo H, Yamada N. L, Kitaguchi M, Kawabata Y, Seto H

    Meeting abstracts of the Physical Society of Japan   Vol. 69 ( 1 )   2014.3

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  145. 29pSD-7 Systematic uncertainty for event id and future prospects of analysis in neutron lifetime measurement at J-PARC/BL05

    Yamada Takahito, Hirota Katsuya, Shimizu Hirohiko M, Kitaguchi Masaaki, Tanaka Genki, Otono Hidetoshi, Yoshioka Tamaki, Oide Hidetoshi, Seki Yoshichika, Ino Takashi, Taketani Kaoru, Yokoyama Harumichi, Shima Tatsushi, Higashi Nao, Katayama Ryo, Sumino H, Mishima Kenji, Yamashita Satoru, Sakakibara Risa, Sugino Tomoaki

    Meeting Abstracts of the Physical Society of Japan   Vol. 69 ( 0 )   2014

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  146. 29pSD-6 Estimation of stability of beam flux and its systematic uncertainty in neutron lifetime measurement at J-PARC/BL05

    Sakakibara Risa, Sumino Hirochika, Mishima Kenji, Yamashita Satoru, Tanaka Genki, Otono Hidetoshi, Yoshioka Tamaki, Oide Hideyuki, Seki Yoshichika, Ino Takashi, Taketani Kaoru, Sugino Tomoaki, Shima Tatsushi, Hirota Katsuya, Shimizu Hirohiko M, Kitaguchi Masaaki, Higashi Nao, Yokoyama Harumichi, Yamada Takahito, Katayama Ryo

    Meeting Abstracts of the Physical Society of Japan   Vol. 69 ( 0 )   2014

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  147. 29pSD-5 Present status of neutron lifetime measurement at J-PARC/BL05

    Kitaguchi Masaaki, Sumino Hirochika, Mishima Kenji, Yamashita Satoru, Tanaka Genki, Otono Hidetoshi, Yoshioka Tamaki, Oide Hidetoshi, Seki Yoshichika, Ino Takashi, Taketani Kaoru, Sakakibara Risa, Shima Tatsushi, Sugino Tomoaki, Hirota Katsuya, Shimizu Hirohiko M, Yokoyama Harumichi, Higashi Nao, Yamada Takahito

    Meeting Abstracts of the Physical Society of Japan   Vol. 69 ( 0 )   2014

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  148. 28aTR-7 Neutron lifetime measurement at J-PARC/BL05 : Present status and future outlook

    Mishima Kenji, Hirota Katsuya, Shimizu Hirohiko M, Kitaguchi Masaaki, Tanaka Genki, Otono Hidetoshi, Yoshioka Tamaki, Oide Hidetoshi, Ino Takashi, Taketani Kaoru, Shima Tatsushi, Yamashita Satoru, Seki Yoshichika, Yamada Takahito, Katayama Ryo, Higashi Nao, Yokoyama Harumichi, Sumino Hirochika, Sakakibara Risa, Sugino Tomoaki

    Meeting Abstracts of the Physical Society of Japan   Vol. 69 ( 0 )   2014

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  149. 18aSJ-2 Evaluation of improved TPC detector in the neutron lifetime measurement at J-PARC/BL05

    Kitahara Ryunosuke, Sakakibara Risa, Sugino Tomoaki, Hirota Katsuya, Shimizu Hirohiko M, Kitaguchi Masaaki, Tanaka Genki, Sumi Naoyuki, Otono Hidetoshi, Yoshioka Tamaki, Oide Hidetoshi, Iwashita Yoshihisa, Seki Yoshichika, Shima Tatsushi, Taketani Kaoru, Ino Takashi, Yamada Takahito, Katayama Ryo, Higashi Nao, Yokoyama Harumichi, Sumino Hirochika, Mishima Kenji, Yamashita Satoru

    Meeting Abstracts of the Physical Society of Japan   Vol. 69 ( 0 )   2014

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  150. 18aSJ-1 Determination of neutron flux for the neutron lifetime measurement at J-PARC/BL05

    Mishima Kenji, Hirota Katsuya, Shimizu Hirohiko M, Kitaguchi Masaaki, Tanaka Genki, Sumi Naoyuki, Otono Hidetoshi, Yoshioka Tamaki, Kitahara Ryunosuke, Iwashida Yoshihisa, Oide Hidetoshi, Yamashita Satoru, Shima Tatsushi, Seki Yoshichika, Ino Takashi, Taketani Kaoru, Yamada Takahito, Katayama Ryo, Higashi Nao, Yokoyama Harumichi, Sumino Hirochika, Sakakibara Risa, Sugino Tomoaki

    Meeting Abstracts of the Physical Society of Japan   Vol. 69 ( 0 )   2014

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  151. 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, A.R.Young

    arXiv:1310.8593v1     page: 1-26   2013.10

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  152. The improvement of the ultracold neutrons rebuncher

    S. Imajo, Y. Iwashita, M. Kitaguchi, H. M. Shimizu, Y. Arimoto, T. Yoshioka, Y. Seki

        page: 448 - 451   2013.8

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  153. 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)

    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, NOP Collaboration

    日本物理学会講演概要集   Vol. 68 ( 1 ) page: 96 - 96   2013.3

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    CiNii Books

  154. J‐PARC BL06用中性子スピンエコー分光器群(VIN ROSE)建設の現状

    HINO MASAHIRO, ODA TATSURO, KITAGUCHI MASAAKI, KAWABATA YUJI, YAMADA NORIFUMI, SETO HIDEKI

    KURRI KR   ( 176 ) page: 41 - 46   2013.1

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  155. ラウエランジュバン研究所における極冷中性子を用いた高分解能MIEZE型スピンエコー分光器の開発

    ODA TATSURO, HINO MASAHIRO, KITAGUCHI MASAAKI, KAWABATA YUJI, GELTENBORT PETER, BRENNER THOMAS

    KURRI KR   ( 176 ) page: 181 - 182   2013.1

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  156. Development of high resolution MIEZE-type neutron spin echo spectrometer with very cold neutron

    Oda Tatsuro, Hino Masahiro, Kitaguchi Masaaki, Kawabata Yuji

    Proceedings of AESJ   Vol. 2013 ( 0 )   2013

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    極冷中性子(VCN)は熱・冷中性子よりも長い波長を有し,これまで主に干渉計等の基礎物理研究に用いられてきた.VCN はミラーでの反射が容易なため,集光光学系によって強度を上げ,同時に位相分散も低減できる可能性がある.また,中性子スピンエコー分光器のエネルギー分 解能は入射中性子波長の3乗に比例して向上するので,スピンエコー法に長波長中性子を用いる利点は大きい.そこで我々はフランス,ラウエランジュバン研究 所の高中性子束炉にある極冷中性子実験孔においてこれまでにない高分解能な MIEZE (Modulated Intensity by Zero Effort) 型中性子スピンエコー装置を構築し,極冷中性子の新たな利用を拓くべく実験を行ってきた.発表では実験の現状と今後の展開を述べる.

    DOI: 10.11561/aesj.2013s.0.127.0

  157. 中性子電気双極子能率測定のための超冷中性子高密度輸送法の開発

    北口雅暁, 有本靖, 今城想平, 岩下芳久, 関義親, 清水裕彦, 三島賢二, 山下了, 吉岡瑞樹, GELTENBORT Peter

    KURRI-KR   ( 176 )   2013

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  158. Current status of J-PARC BL06 neutron beam line and development of focusing devices

    Hino Masahiro, Oda Tatsuro, Kitaguchi Masaaki, Kawabata Yuji, Yamada Norifumi, Seto Hideki

    Proceedings of AESJ   Vol. 2013 ( 0 )   2013

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    平成23年度よりKEK-京大の連携で、J-PARC BL06に中性子共鳴スピンエコー装置群:VIN ROSE(The VIllage of Neutron ResOnance Spin Echo spectrometers)のためのビームライン建設を開始した。ここで利用するすべての中性子スーパーミラーは京大炉のイオンビームスパッタ装置で製作しており、本講演ではその現状と集光デバイス開発の展開を述べたい

    DOI: 10.11561/aesj.2013s.0.128.0

  159. 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

    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, 有本靖志, 關義親

    日本物理学会講演概要集   Vol. 68 ( 1 )   2013

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  160. 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

    今城想平, 岩下芳久, 清水裕彦, 北口雅暁, 吉岡瑞樹, 有本靖, 關義親

    日本物理学会講演概要集   Vol. 68 ( 2 )   2013

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  161. J‐PARC基礎物理ビームラインBL05 NOPの現状

    北口雅暁, 山田崇人, 片山領, 東直, 横山晴道, 角野浩史, 三島賢二, 山下了, 田中元気, 松本悟, 音野瑛俊, 吉岡瑞樹, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 生出秀行, 有本靖, 猪野隆, 竹谷薫, 酒井健二, 嶋達志, 今城想平, 岩下芳久, 日野正裕, 関義親

    日本中性子科学会年会講演概要集   Vol. 13th   page: 20   2013

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  162. 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     page: 1187   2013

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  163. 中性子スピンエコー分光器群(VIN ROSE)のための高輝度ビームラインの建設(2009S07)

    HINO MASAHIRO, ODA TATSURO, YAMADA NORIFUMI, KITAGUCHI MASAAKI, SAGEHASHI HIDENORI, SETO HIDEKI, KAWABATA YUJI

    物構研サイエンスフェスタ要旨集   Vol. 1st   page: 16   2013

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  164. 中性子を用いた重力法則の検証

    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   Vol. 68 ( 1 )   2013

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  165. J‐PARC BL06ビームライン建設とVIN ROSE開発の現状

    HINO MASAHIRO, KITAGUCHI MASAAKI, KAWABATA YUJI, ODA TATSURO, YAMADA NORIFUMI, SAGEHASHI HIDENORI, SETO HIDEKI

    日本中性子科学会年会講演概要集   Vol. 12th   page: 88   2012.12

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  166. KUR E2ポートでの産業利用を目指した中性子ラジオグラフィ測定

    KATO JUN'ICHI, HIROTA KATSUYA, IKEGAMI YUJI, MIHARA SHUNSUKE, OTAKE YOSHIE, YAMAGATA YUTAKA, KAWABATA YUJI, SAITO YASUSHI, KITAGUCHI MASAAKI, ITO DAISUKE

    日本中性子科学会年会講演概要集   Vol. 12th   page: 41   2012.12

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  167. 11aSG-6 Estimation of nonspecular reflection of ultracold neutrons from surface roughness

    Seki Yoshichika, Kitaguchi Masaaki, Yoshioka Tamaki, Shimizu Hirohiko, Yamada Norifumi, NOP Collaboration

    Meeting abstracts of the Physical Society of Japan   Vol. 67 ( 2 ) page: 13 - 13   2012.8

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  168. Demonstration of Accelerator for Ultracold Neutrons International coauthorship

    Y. Arimoto, P. Gertenbort, S. Imajo, Y. Iwashita, M. Kitaguchi, Y. Seki, H. M. Shimizu, T. Yoshioka

        page: 94 - 96   2012.8

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  169. 25pCL-13 Current status and perspective of VIN ROSE at BLOB at J-PARC/MLF

    Hino M, Oda T, Yamada N.L, Kitaguchi M, Sagehashi H, Seto H, Kawabata Y

    Meeting abstracts of the Physical Society of Japan   Vol. 67 ( 1 )   2012.3

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  170. J‐PARC BL06中性子共鳴スピンエコー分光器群(VIN ROSE)用ビームライン建設の現状と展望

    HINO MASAHIRO, KITAGUCHI MASAAKI, KAWABATA YUJI, ODA TATSURO, YAMADA NORIFUMI, SAGEHASHI HIDENORI, SETO HIDEKI

    日本原子力学会春の年会予稿集(CD-ROM)   Vol. 2012   page: ROMBUNNO.P13   2012.3

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    DOI: 10.11561/aesj.2012s.0.112.0

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  171. Development of Transport Optics for Pulsed Ultra-Cold Neutrons with High Density

    北口 雅暁, 吉岡 瑞樹, 三島 賢二

    京都大学原子炉実験所学術講演会報文集   Vol. 46 ( 0 ) page: 194 - 197   2012.1

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  172. Current Status of Development of VIN ROSE Spectrometers

    日野 正裕, 北口 雅暁, 川端 祐司

    京都大学原子炉実験所学術講演会報文集   Vol. 46 ( 0 ) page: 184 - 189   2012.1

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  173. J‐PARC BL06中性子共鳴スピンエコー分光器群(VIN ROSE)ビームライン設計のためのシミュレーション

    ODA TATSURO, HINO MASAHIRO, KITAGUCHI MASAAKI, KAWABATA YUJI, EBISAWA TOORU, YAMADA NORIFUMI, SETO HIDEKI

    京都大学原子炉実験所学術講演会報文集   Vol. 46th   page: 190 - 193   2012.1

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  174. 中性子電気双極子能率測定実験のための超冷中性子加減速器の実証

    北口雅暁, 吉岡瑞樹, 有本靖, 関義親, 今城想平, 岩下芳久, 清水裕彦, GELTENBORT Peter

    日本中性子科学会年会講演概要集   Vol. 12th   2012

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  175. 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

    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   Vol. 67 ( 1 )   2012

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  176. 重水素化ダイヤモンド・ライク・カーボンを用いた中性子ミラーの評価

    櫻井大, 千葉順成, 清水裕彦, 猪野隆, 武藤豪, 金子直勝, 三島賢二, 吉岡瑞樹, 北口雅暁, 尾関和秀, 関義親, 覚正信徳

    日本中性子科学会年会講演概要集   Vol. 12th   2012

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  177. Development of VCN-MIEZE spectrometer at ILL International coauthorship

    Hino Masahiro, Oda tatsuro, Kitaguchi Masaaki, Geltenbort Peter, Brenner Thomas, Kawabata Yuji

    Proceedings of AESJ   Vol. 2012 ( 0 )   2012

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    京大炉で開発したMIEZE分光器の分解能は中性子波長の3乗に比例するため、高分解能化には長波長中性子の利用が有利である。またビーム集光も長波長はゲインが大きい。そこで極冷中性子が充分な強度がある、ILLのVCNポートに装置を設置し、そのテストを計画している。その概要を説明する。

    DOI: 10.11561/aesj.2012f.0.111.0

  178. J-PARC MLFにおける超冷中性子(UCN)Rebuncherの開発

    今城想平, 岩下芳久, 清水裕彦, 吉岡瑞樹, 北口雅暁, 有本靖, 關義親

    日本物理学会講演概要集   Vol. 67 ( 2 )   2012

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  179. Rebunching low energy neutrons by magnetic acceleration and deceleration Reviewed

    Y. Iwashita, S. Imajo, M. Kitaguchi, Y. Arimoto, H.M. Shimizu, T. Yoshioka, Y. Seki, P. Geltenbort

    IPAC 2012 - International Particle Accelerator Conference 2012     page: 2766 - 2768   2012

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  180. 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

    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   Vol. 67 ( 2 )   2012

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  181. Small-Angle Neutron Scattering with University-Based Neutron Source –What can we measure with UBNS? -

    M. Sugiyama, M. Hino, M. Kitaguchi, Y. Kawabata, K. Mori, T. Fukunaga, M. Ohnuma, Y. Oba, K. Hara, M. Furusaka

    1st Asia-Oceania Conference on Neutron Scattering, Tsukuba, Japan     2011.11

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  182. 16aSD-7 Ultracold neutron generation by means of Doppleishifter in J-PARC/MLF III

    Imajo S, Fujioka H, Shimizu H.M, Mishima K, Yoshioka T, Kitagurhi M, Hino M, NOP collaboration

    Meeting abstracts of the Physical Society of Japan   Vol. 66 ( 2 )   2011.8

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  183. 中性子EDM測定用のリバンチャーRF共振器

    岩下 芳久, 北口 雅暁, 吉岡 瑞樹, 今城 想平, 三島 賢二, 那須 裕司, 不破 康裕, 有本 靖, 清水 裕彦

    日本加速器学会 ,つくば国際会議場     2011.8

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  184. Neutron Resonance Spin Echo method and its application Reviewed

    Hamon   Vol. 21 ( 3 ) page: 169 - 173   2011.8

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  185. 25pTN-2 Development of neutron differential phase contrast imaging technique

    Seki Yoshichika, Otake Yoshie, Hirota Katsuya, Adachi Tomohiro, Yamagata Yutaka, Ju Jungmyoung, Morita Shinya, Iwashita Yoshihisa, Ichikawa Masahiro, Kitaguchi Masaaki, Hino Masahiro, Takahashi Toshio, Yoshizawa Hideki, Lee S. W, Olbinado M. P, Yashiro Wataru, Momose Atsushi

    Meeting abstracts of the Physical Society of Japan   Vol. 66 ( 1 )   2011.3

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  186. 28aGB-7 Ultracold neutron generation by means of Dopplershifter in J-PARC/MLF

    Imajo S, Fujioka H, Shimizu H. M, Mishima K, Yoshioka T, Kitaguchi M, Hino M, NOP collaboration

    Meeting abstracts of the Physical Society of Japan   Vol. 66 ( 1 )   2011.3

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  187. 28aGB-12 Observation Experiment of Gravity Induced Quantum States of Ultra-Cold Neutrons Upgrade of Experimental Setup

    Minami Yuto, Ichikawa Go, Komamiya Sachio, Kamiya Yoshio, Kawasaki Shinsuke, Sanuki Tomoyuki

    Meeting abstracts of the Physical Society of Japan   Vol. 66 ( 1 )   2011.3

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  188. Longitudinal-gradient magnet for time focusing of ultra-cold neutrons

    Y. Arimoto, T. Yoshioka, H. M. Shimizu, K. Mishima, T. Ino, K. Taketani, S. Muto, M. Kitaguchi, S. Imajo, Y. Iwashita, S. Yamashita, Y. Kamiya, A. Yoshimi, K. Asahi, T. Shima, K. Sakai

    Physics Procedia   Vol. 17   page: 20 - 29   2011.1

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    A gradient DC magnet is designed using 3D magnetic field analysis code. This magnet, referred to as a B0magnet, 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 B0magnet 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

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  189. 中性子光学機器の開発と新型中性子散乱装置及びイメージングへの展開

    KAWABATA YUJI, HINO MASAHIRO, KITAGUCHI MASAAKI, TANAKA HIROKI, TAKAMIYA KOICHI, SEKIMOTO SHUN, SAITO YASUSHI, XU QU, TAKAHASHI SENTARO, TAKENAKA NOBUYUKI, TSUKADA TAKAO, UMEKAWA HISASHI, MATSUSHIMA UZUKI, YAMAGATA YUTAKA, TASAKI SEIJI

    京都大学原子炉実験所学術講演会報文集   Vol. 45th   page: 17 - 24   2011.1

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  190. 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

    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   Vol. 66 ( 2 )   2011

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  191. 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

    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   Vol. 66 ( 1 )   2011

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  192. 2次元中性子集光デバイスの開発

    日野正裕, 小田達郎, 北口雅暁, 川端祐司

    日本原子力学会、2011年秋の大会     2011

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    DOI: 10.11561/aesj.2011f.0.121.0

  193. Current status of VIN ROSE for J-PARC and large-scale supermirror development at KURRI Reviewed International journal

    M.Hino, T.Oda, M.Kitaguchi, Y.Kawabata, N.L.Yamada, H.Seto, T.Ebisawa

    1st Asia-Oceania Conference on Neutron Scattering, Tsukuba, 2011, PS2-037.     2011

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  194. J-PARC BL06 中性子共鳴スピンエコー分光器群(VIN ROSE)のためのビームライン設計

    小田達郎, 日野正裕, 北口雅暁, 川端祐司, 海老沢徹, 瀬戸秀紀

    日本原子力学会、2011年春の大会     2011

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  195. Numerical simulations of neutgron beam line for resonance spin echo spectrometers (VIN-ROSE)

    T.Oda, M.Hino, M.Kitaguchi, Y.Kawabata, T.Ebisawa, N.L.Yamada, H.Seto

    1st Asia-Oceania Conference on Neutron Scattering, Tsukuba, 2011, PS2-036.     2011

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  196. 13aSK-8 Ultracold neutron generation by means of Dopplershifter in J-PARC/MLF

    Imajo S, Fujioka H, Shimizu H. M, Mishima K, Yoshioka T, Kitaguchi M, Hino M, NOP collaboration

    Meeting abstracts of the Physical Society of Japan   Vol. 65 ( 2 )   2010.8

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  197. 22pBF-4 Development of Dopplershifter for ultracold neutron generation in J-PARC

    Imajo S, Fujioka H, Shimizu H, Mishima K, Yoshioka T, Kitaguchi M, Hino M, NOP collaboration

    Meeting abstracts of the Physical Society of Japan   Vol. 65 ( 1 )   2010.3

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  198. 共鳴中性子スピンエコー分光器群(VIN ROSE)開発の進展

    HINO MASAHIRO, KITAGUCHI MASAAKI, BLEUEL MARKUS, KAWABATA YUJI, ACHIWA NORIO, KATAGIRI MASAKI, YAMAZAKI DAI, EBISAWA TOORU

    京都大学原子炉実験所学術講演会報文集   Vol. 44th   page: 106 - 111   2010.1

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  199. Development of neutron interferometer and spin echo at J-PARC MLF BL05

    北口 雅暁, 日野 正裕, 川端 祐司

    京都大学原子炉実験所学術講演会報文集   Vol. 44   page: 112 - 115   2010.1

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  200. 共鳴スピンエコー分光装置の開発と展開

    KITAGUCHI MASAAKI, HINO MASAHIRO, KAWABATA YUJI, ODA TATSURO

    NSL News Lett   ( 2010-2 ) page: 7,53-58   2010

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  201. 超冷中性子を用いた基礎物理とJ-PARCでの展開

    北口雅暁, 今城想平, 岩下芳久, 山下了, 三島賢二, 吉岡瑞樹, 有本靖, 清水裕彦

    日本中性子科学会年会講演概要集   Vol. 10th   2010

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  202. 23aEF-4 Observation of the phase transition of the water soluble 3-block copolymer (PEO-PPO-PEO) with focusing VCN-SANS

    Yamada M, Hino M, Kitaguchi M, Kennedy Shane J, Guerald Bruno, Manzin Giuliana, Andersen Ken, Geltenbort Peter, Lal Jyotsana, Carpenter John M, Bleuel Markus, Iwashita Y, NOP collaboration, Kanaya T, Ichikawa M, Tongu H, Shimizu H. M, Yamada N. L, Mishima K, Hirota K

    Meeting Abstracts of the Physical Society of Japan   Vol. 65 ( 0 )   2010

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  203. 23pHT-5 Development of Village of Neutron ResOnance Spin Echo spectrometer (VIN ROSE) II

    Hino M, NOP collaboration, Kitaguchi M, Bleuel Markus, Kawabata Y, Achiwa N, Ebisawa T, Katagiri M, Oikawa K, Maekawa F

    Meeting Abstracts of the Physical Society of Japan   Vol. 65 ( 0 )   2010

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  204. Development of Resonance Spin Echo for Neutron Small Angle Scattering Spectrometer

    M.Kitaguchi, M.Hino, Y.Kawabata, T.Oda, S.tasaki, Y.Noda, S.Koizumi

    KURRI Progress Report     page: 119 - 119   2010

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  205. KUR E‐2ポートにおける工業製品の中性子ラジオグラフィー測定

    YAMAGATA YUTAKA, HIROTA KATSUYA, MORITA SHIN'YA, JU J, SERA TOSHIHIRO, YOKOTA HIDEO, OTAKE YOSHIE, SUNAGA HIDEYUKI, MAKINOUCHI AKITAKE, IWASHITA YOSHIHISA, KITAGUCHI MASAAKI, KAWABATA YUJI

    日本中性子科学会年会講演概要集   Vol. 10th   page: 47   2010

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  206. Trial to Fabricate Large-scale Neutron Supermirror by using IBS Instrument at KURRI

    M.Hino, T.Oda, M.Kitaguchi, Y.Kawabata

    KURRI Progress Report     page: 118 - 118   2010

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  207. 中性子共鳴スピンエコー分光器群(VINROSE)開発の現状と展開

    HINO MASAHIRO, KITAGUCHI MASAAKI, KAWABATA YUJI, ACHIWA NORIO, EBISAWA TOORU, KATAGIRI MASAKI, YAMAZAKI DAI, NODA YOHEI, KOIZUMI SATOSHI, SETO HIDEKI

    日本中性子科学会年会講演概要集   Vol. 10th   page: 73   2010

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  208. MIEZE/NRSE共鳴中性子スピンエコー分光器群(VIN ROSE)の開発

    HINO MASAHIRO, KITAGUCHI MASAAKI, BLEUEL MARKUS, KAWABATA YUJI, ACHIWA NORIO, EBISAWA TOORU, KATAGIRI MASAKI, YAMAZAKI DAI, HAYASHIDA HIROTOSHI, TASAKI SEIJI

    日本原子力学会秋の大会予稿集(CD-ROM)   Vol. 2009   page: H27   2009.8

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  209. 13aSA-2 Observation Experiment of Gravity Induced Quantum States of Ultra-Cold Neutrons : Results at ILL/PF2 II

    Kawasaki Shinsuke, Ichikawa Go, Komamiya Sachio, Kamiya Yoshio, Sanuki Tomoyuki, Shimizu Hirohiko M, Hino Masahiro, Kitaguchi Masaaki

    Meeting abstracts of the Physical Society of Japan   Vol. 64 ( 2 )   2009.8

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  210. 27aSE-14 Observation Experiment of Quantum States of Ultra-Cold Neutrons in the Gravity at ILL

    Ichikawa Go, Kawasaki Shinsuke, Komamiya Sachio, Kamiya Yoshio, Sanuki Tomoyuki, Shimizu Hirohiko M, Hino Masahiro, Kitaguchi Masaaki

    Meeting abstracts of the Physical Society of Japan   Vol. 64 ( 1 )   2009.3

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  211. 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

    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   Vol. 64 ( 1 ) page: 25   2009.3

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  212. J‐PARC BL05ビームライン用スピンフリップチョッパー

    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   Vol. 64 ( 1 ) page: 25   2009.3

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  213. McStas simulation for the new MIEZE (modulation of intensity by zero effort) spectrometer at JSNS/J-PARC (京都大学原子炉実験所第43回学術講演会報文集)

    Bleuel Markus, Hino Masahiro, Kitaguchi Masaaki

    京都大学原子炉実験所学術講演会報文集   Vol. 43   page: 203 - 206   2009.1

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  214. MIEZE型スピンエコー分光器開発の現状

    HINO MASAHIRO, KITAGUCHI MASAAKI, BLEUEL MARKUS, KAWABATA YUJI, ACHIWA NORIO, HAYASHIDA HIROTOSHI, EBISAWA TOORU

    京都大学原子炉実験所学術講演会報文集   Vol. 43rd   page: 199 - 202   2009.1

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  215. Development of multilayer mirrors with flat surfaces for neutron interferometry for pulsed neutrons

    北口 雅暁, 日野 正裕, 川端 祐司

    京都大学原子炉実験所学術講演会報文集   Vol. 43   page: 166 - 170   2009.1

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  216. 縦集光用高反射率多層膜反射ミラーの開発と展開

    HINO MASAHIRO, KITAGUCHI MASAAKI, KAWABATA YUJI

    日本中性子科学会年会講演概要集   Vol. 9th   page: 92   2009

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  217. 27aYK-2 Development of Village of Neutron ResOnance Spin Echo spectrometerst(VTN ROSE)

    Hino M, Kitaguchi M, Bleuel Markus, Kawabata Y, Achiwa N, Ebisawa T, Katagiri M, Hayashida H, Yamazaki D

    Meeting Abstracts of the Physical Society of Japan   Vol. 64 ( 0 )   2009

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  218. 30aRE-11 TOF-method to measure dynamics of magnetic nanoparticle by using MIEZE spectrometer

    Hino M, Kitaguchi M, Bleuel Markus, Kawabata Y, Achiwa N, Hayashida H, Ebisawa T, Yamazaki D

    Meeting Abstracts of the Physical Society of Japan   Vol. 64 ( 0 )   2009

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  219. 27pYK-2 Neutron Optics and Physics (NOP) beamline BL05 at J-PARC/MLF

    Ino T., Kubota T., Yamashita S., Suzuki Z., Sanuki T., Sakai K., Suzuki J., Oku T., Shinohara T., Kitaguchi M., Hino M., Mishima K., Yamada M., Iwashita Y., Shima T., Seki Y., Funahashi H., Hirota K., Otake Y., Taketani K., Yoshioka T., Arimoto Y., Muto S., Shimizu H. M., Otono H., Oide H.

    Meeting Abstracts of the Physical Society of Japan   Vol. 64 ( 0 ) page: 881 - 881   2009

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    DOI: 10.11316/jpsgaiyo.64.2.4.0_881_1

  220. J‐PARC BL05低発散ブランチにおける干渉計・スピンエコー開発

    KITAGUCHI MASAAKI, HINO MASAHIRO, KAWABATA YUJI, SEKI YOSHICHIKA, FUNAHASHI HARUHIKO, TAKETANI KAORU, SHIMIZU HIROHIKO

    日本中性子科学会年会講演概要集   Vol. 9th   page: 94   2009

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  221. Progress on MIEZE spectrometer

    Hino Masahiro, Tasaki Seiji, Kitaguchi Masaaki, Markus Bleuel, Achiwa Norio, Hayashida Hirotoshi, Kawabata Yuji, Ebisawa Toru, Yamazaki Dai, Maruyama Ryuji

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2009 ( 0 ) page: 139 - 139   2009

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    DOI: 10.11561/aesj.2009s.0.139.0

  222. MIEZE中性子スピンエコー法による細孔シリカゲル中H<sub>2</sub>Oのダイナミックス

    ACHIWA NORIO, HINO MASAHIRO, BLEUEL M, KITAGUCHI MASAAKI, KAWABATA YUJI, EBISAWA TOORU

    日本中性子科学会年会講演概要集   Vol. 9th   page: 127   2009

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  223. Development of VIN ROSE(VIllage of Neutron ResOnance Spin Echo spectrometers)

    Hino Masahiro, Kawabata Yuji, Kitaguchi Masaaki, Bleuel Markus, Achiwa Norio, Ebisawa Toru, Katagiri Masaki, Yamazaki Dai, Hayashida Hitrotoshi, Tasaki Seiji

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2009 ( 0 ) page: 158 - 158   2009

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    DOI: 10.11561/aesj.2009f.0.158.0

  224. MIEZE/NRSE分光器群(VIN ROSE)の開発

    日野正裕, 北口雅暁, マークスブロイエル, 田崎誠司, 川端祐司, 阿知波紀郎, 海老澤徹, 片桐政樹, 山崎大, 林田洋寿

    日本原子力学会、2009年秋の大会     2009

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  225. MIEZE/NRSE共鳴中性子スピンエコー分光器開発の現状と展開

    HINO MASAHIRO, KITAGUCHI MASAAKI, KAWABATA YUJI, ACHIWA NORIO, EBISAWA TOORU, KATAGIRI MASAKI, YAMAZAKI DAI, HAYASHIDA HIROTOSHI, BLEUEL MARKUS

    日本中性子科学会年会講演概要集   Vol. 9th   page: 62   2009

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  226. J‐PARC基礎物理ビームラインBL05建設

    猪野隆, 三島賢二, 竹谷薫, 吉岡瑞樹, 武藤豪, 清水裕彦, 嶋達志, 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

    NSL News Lett   ( 2009-1 ) page: 29 - 33   2009

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  227. 23aSJ-10 Observation of quantum states of Ultra-Cold Neutrons in the Gravitational Field : Estimation of the Performance of the Detector by Cold Neutrons

    Ichikawa Go, Kawasaki Shinsuke, Komamiya Sachio, Kamiya Yoshio, Sanuki Tomoyuki, Shimizu Hirohiko M, Hino Masahiro, Kitaguchi Masaaki

    Meeting abstracts of the Physical Society of Japan   Vol. 63 ( 2 )   2008.8

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  228. 23pSM-5 Development of Very Cold Neutron Interferometer

    Seki Yoshichika

    Meeting abstracts of the Physical Society of Japan   Vol. 63 ( 2 )   2008.8

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  229. 23aSJ-9 Observation of quantum states of Ultra-Cold Neutrons in the Gravitational Field : Report on a performance test of pixel detector for Ultra-Cold Neutrons at ILL

    Kawasaki Shinsuke, Ichikawa Go, Komamiya Sachio, Kamiya Yoshio, Sanuki Tomoyuki, Shimizu Hirohiko M, Hino Masahiro, Kitaguchi Masaaki

    Meeting abstracts of the Physical Society of Japan   Vol. 63 ( 2 )   2008.8

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  230. J‐PARCパルス中性子を用いた中性子干渉実験

    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   Vol. 63 ( 2 ) page: 23   2008.8

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  231. 26pZJ-7 Performance estimation of CCD neutron detector

    Sonoda Shinya, Kawasaki Shinsuke, Kamiya Yoshio, Komamiya Sachio, Sanuki Tomoyuki, Hino Masahiro, Kitaguchi Masaaki

    Meeting abstracts of the Physical Society of Japan   Vol. 63 ( 1 )   2008.2

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  232. 26pZJ-8 Development of a pixel detector for ultra cold neutron

    Kawasaki Shinsuke, Sonoda Shinya, Komamiya Shachio, Kamiya Yoshio, Sanuki Tomoyuki, Hino Masahiro, Kitaguchi Masaaki

    Meeting abstracts of the Physical Society of Japan   Vol. 63 ( 1 )   2008.2

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  233. Development of multilayer mirrors with flat surfaces for neutron interferometry

    北口 雅暁, 日野 正裕, 川端 祐司

    京都大学原子炉実験所学術講演会報文集   Vol. 42   page: 163 - 167   2008.1

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  234. Development of transmission geometry polarizing neutron supermirror

    日野 正裕, 北口 雅暁, 川端 祐司

    京都大学原子炉実験所学術講演会報文集   Vol. 42   page: 131 - 134   2008.1

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  235. Observation of superparamagnetic relaxation by using MIEZE spectrometer

      Vol. 42   page: 135 - 140   2008.1

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  236. Development of neutron beam divergence correction mirror for high resolution neutron spin echo

    Maruyama Ryuji, Yamazaki Dai, Ebisawa Toru, Soyama Kazuhiko, Hino Masahiro, Kitaguchi Masaaki, Hayashida Hirotoshi, Kawabata Yuji

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2008 ( 0 ) page: 162 - 162   2008

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    DOI: 10.11561/aesj.2008f.0.162.0

  237. Development of transmission geometry supermirror neutron polarizer

    Hino Masahiro, Kitaguchi Masaaki, Hayashida Hirotoshi, Kawabata Yuji, Tasaki Seiji

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2008 ( 0 ) page: 142 - 142   2008

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    DOI: 10.11561/aesj.2008s.0.142.0

  238. 24pWG-8 Observation of superparamagnetic fluctuations in magnetic ferrofluid by using MIEZE spectrometer

    Hino M., Kitaguchi M., Hayashida H., Achiwa N., Kawabata Y., Ebisawa T., Yamazaki D., Tasaki S.

    Meeting Abstracts of the Physical Society of Japan   Vol. 63 ( 0 ) page: 930 - 930   2008

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    DOI: 10.11316/jpsgaiyo.63.1.4.0_930_3

  239. First experiment for magnetic scattering on MIEZE spectrometer Reviewed International journal

    H. Hayashida, M. Hino, M. Kitaguchi, Y. Kawabata, N. Achiwa

    8th Korea-Japan meeting on Neutron Science, Kyoto, Japan, 2008 P02     2008

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  240. Observation of superparamagnetic relaxation by using MIEZE spectrometer

    Hayashida Hirotoshi, Hino Masahiro, Kitaguchi Masaaki, Kawabata Yuji, Achiwa Norio

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2008 ( 0 ) page: 145 - 145   2008

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    DOI: 10.11561/aesj.2008s.0.145.0

  241. Present status and perspective on MIEZE/NRSE development at C3-1-2-2(MINE1) port at JRR-3M reactor JAEA

    HINO Masahiro, KITAGUCHI Masaaki, HAYASHIDA Hirotoshi, KAWABATA Yuji, ACHIWA Norio, EBISAWA Toru, TASAKI Seiji

    KURRI KR (CD) (CD-ROM)   ( 17 ) page: ROMBUNNO.24   2008

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  242. TOF-MIEZE spectroscopy for pulsed neutron source

    M.Hino, M.Kitaguchi, H.Hayashida, N.Achiwa, T.Ebisawa, R.Maruyama, M.Bleuel, J.Lal, S.Tasaki, Y .Kawabata

    PNCMI2008, Tokai, September 1-5 2008     2008

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  243. Recent results and perspective on MIEZE development

    M.Hino, M.Kitaguchi, M.Bleuel, N.Achiwa, H.Hayashida, T.Ebisawa, R.Maruyama, Y .Kawabata

    3rd Taiwan-Japan workshop on neutron scattering, Kyoto, December, 2008     2008

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  244. 遠心分離磁性流体の中性子小角散乱・中性子スピンエコー法による静的・動的構造

    ACHIWA NORIO, HAYASHIDA HIROTOSHI, HINO MASAHIRO, KITAGUCHI MASAAKI, KAWABATA YUJI, EBISAWA TOORU

    磁性流体連合講演会講演論文集   Vol. 2007-12   page: 41 - 44   2007.12

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  245. 超高性能多層膜偏極ミラーの開発 II

    HINO MASAHIRO, KITAGUCHI MASAAKI, KAWABATA YUJI, HAYASHIDA HIROTOSHI, TASAKI SEIJI, EBISAWA TOORU, ACHIWA NORIO

    京都大学原子炉実験所学術講演会報文集   Vol. 41st   page: 115 - 118   2007.1

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  246. 超高性能多層膜偏極ミラーの開発(2) (第41回京都大学原子炉実験所学術講演会 報文集)

    日野 正裕, 北口 雅暁, 川端 祐司

    京都大学原子炉実験所学術講演会報文集   Vol. 41   page: 115 - 118   2007.1

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  247. J‐Parc共鳴スピンエコー装置のための高周波スピンフリッパーの開発―性能向上と安定化―

    KITAGUCHI MASAAKI, HINO MASAHIRO, KAWABATA YUJI, HAYASHIDA HIROTOSHI, MATSUOKA SEIKICHI, TASAKI SEIJI, MARUYAMA RYUJI, EBISAWA TOORU

    京都大学原子炉実験所学術講演会報文集   Vol. 41st   page: 110 - 114   2007.1

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  248. MIEZE型共鳴スピンエコー装置における実効周波数1MHzシグナルの観測 (第41回京都大学原子炉実験所学術講演会 報文集)

    林田 洋寿, 北口 雅暁, 日野 正裕

    京都大学原子炉実験所学術講演会報文集   Vol. 41   page: 98 - 103   2007.1

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  249. Development of soft magnetic multilayer for neutron polarzing device working under low magnetic field

    HINO MASAHIRO, KITAGUCHI MASAAKI, HAYASHIDA HIROTOSHI, KAWABATA YUJI, TASAKI SEIJI, MARUYAMA RYUJI, EBISAWA TORU

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2007 ( 0 ) page: 122 - 122   2007

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    DOI: 10.11561/aesj.2007s.0.122.0

  250. Development of multi-Bootstrap resonance spin flipper for high resolution neutron spin echo

    Matsuoka Seikichi, Kitaguchi Masaaki, Hayashida Hirotoshi, Hino Masahiro, Kawabata Yuji, Tasaki Seiji

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2007 ( 0 ) page: 120 - 120   2007

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    DOI: 10.11561/aesj.2007s.0.120.0

  251. Correction of beam divergence effect for high resolution neutron resonance spin echo spectrometer

    Kitaguchi Masaaki, Hino Masahiro, Kawabata Yuji, Hayashida Hirotoshi, Matsuoka Seikichi, Tasaki Seiji, Maruyama Ryuji, Ebisawa Toru

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2007 ( 0 ) page: 119 - 119   2007

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    DOI: 10.11561/aesj.2007s.0.119.0

  252. 高分解能共鳴スピンエコー装置のための位相補正デバイスの開発

    KITAGUCHI MASAAKI, HINO MASAHIRO, KAWABATA YUJI, HAYASHIDA HIROTOSHI, TASAKI SEIJI, EBISAWA TOORU

    日本中性子科学会年会講演概要集   Vol. 7th   page: 105   2007

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  253. 19aXB-10 Present status of development of MIEZE type NRSE spectrometer

    Hino M., Kitaguchi M., Hayashida H., Kawabata Y., Tasaki S., Yamazaki D., Ebisawa T., Achiwa N.

    Meeting Abstracts of the Physical Society of Japan   Vol. 62 ( 0 ) page: 950 - 950   2007

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    DOI: 10.11316/jpsgaiyo.62.1.4.0_950_1

  254. 21aTC-4 Development of devices for high resolution NRSE spectrometer

    Kitaguchi Masaaki, Hino Masahiro, Kawabata Yuji, Hayashida Hirotoshi, Tasaki Seiji, Ebisawa Toru

    Meeting Abstracts of the Physical Society of Japan   Vol. 62 ( 0 ) page: 970 - 970   2007

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    DOI: 10.11316/jpsgaiyo.62.2.4.0_970_4

  255. 19aXB-11 Development of resonance spin flipper with high frequency for NRSE spectrometer

    Kitaguchi Masaaki, Hino Masahiro, Kawabata Yuji, Hayashida Hirotoshi, Matsuoka Seikichi, Tasaki Seiji, Ebisawa Toru

    Meeting Abstracts of the Physical Society of Japan   Vol. 62 ( 0 ) page: 950 - 950   2007

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    DOI: 10.11316/jpsgaiyo.62.1.4.0_950_2

  256. Development of MIEZE spectrometer in JRR-3M

    H.Hayashida, M.Hino, M.Kitaguchi, Y.Kawabata, D.Yamazaki, R.Maruyama, T.Ebisawa, N.Achiwa

    the 7th Japan-Korea Meeting on Neutron Science     page: 103 - 0   2007

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  257. Present status of developing MIEZE/NRSE spectrometers for J-PARC

    Hino Masahiro, Achiwa Norio, Kitaguchi Masaaki, Hayashida Hirotoshi, Kawabata Yuji, Tasaki Seiji, Abe Yutaka, Yamazaki Dai, Maruyama Ryuji, Ebisawa Toru

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2007 ( 0 ) page: 164 - 164   2007

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    DOI: 10.11561/aesj.2007f.0.164.0

  258. Development of neutron interferometer with wide-gapped "bSE"s for precision measurements Reviewed International journal

    Y. Seki, M. Kitaguchi, H. Funahashi, K. Taketani, M. Hino, Y. Otake, H.M. Shimizu

    AIP Conference Proceedings   Vol. 915   page: 202 - 205   2007

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    DOI: 10.1063/1.2750763

  259. MIEZE/NRSE中性子スピンエコー分光器開発の現状

    HINO MASAHIRO, KITAGUCHI MASAAKI, HAYASHIDA HIROKAZU, ACHIWA NORIO, KAWABATA YUJI, TASAKI SEIJI, YAMAZAKI DAI, MARUYAMA RYUJI, EBISAWA TOORU

    日本中性子科学会年会講演概要集   Vol. 7th   page: 104   2007

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  260. Study on dynamics of ferrofluid by using MIEZE spectrometer

    Hayashida Hirotoshi, Hino Masahiro, Kitaguchi Masaaki, Kawabata Yuji, Matsuoka Seikichi, Achiwa Norio

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2007 ( 0 ) page: 121 - 121   2007

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    DOI: 10.11561/aesj.2007s.0.121.0

  261. MIEZE neutron spin echo studies on dynamics of magnetite ferrofluids

    Hayashida Hirotoshi, Achiwa Norio, Hino Masahiro, Kitaguchi Masaaki, Kawabata Yuji

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2007 ( 0 ) page: 165 - 165   2007

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    DOI: 10.11561/aesj.2007f.0.165.0

  262. MIEZE型分光器による磁性流体超常磁性ダイナミクスの観測

    HAYASHIDA HIROTOSHI, HINO MASAHIRO, KITAGUCHI MASAAKI, KAWABATA YUJI, ACHIWA NORIO

    日本中性子科学会年会講演概要集   Vol. 7th   page: 82   2007

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  263. 30pXD-6 Jamin type cold-neutron interferometer for precise measurement of Aharonov-Casher effect

    Seki Y, Funahashi H, Taketani K, Hino M, Kitaguchi M, Otake Y, Shimizu H.M

    Meeting abstracts of the Physical Society of Japan   Vol. 61 ( 1 )   2006.3

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  264. Development of Mach-Zehnder interferometer and "Coherent beam steering" technique for cold neutrons Reviewed International journal

    K. Taketani, H. Funahashi, Y. Seki, M. Hino, M. Kitaguchi, R. Maruyama, R. Maruyama, Y. Otake, H. M. Shimizu

    Proceedings of the 8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005     page: 282 - 285   2006.1

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    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.

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  265. 超高性能多層膜偏極ミラーの開発 I

    HINO MASAHIRO, KITAGUCHI MASAAKI, KAWABATA YUJI, KUME TETSUYA, HAYASHIDA HIROTOSHI, TASAKI SEIJI, MARUYAMA RYUJI, TAKEDA MASAYASU, TORIKAI NAOYA

    京都大学原子炉実験所学術講演会報文集   Vol. 40th   page: 174 - 177   2006.1

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  266. J‐Parc共鳴スピンエコー装置のための高周波共鳴スピンフリッパーの開発

    KITAGUCHI MASAAKI, HINO MASAHIRO, KAWABATA YUJI, HAYASHIDA HIROTOSHI, TASAKI SEIJI, MARUYAMA RYUJI, EBISAWA TOORU

    京都大学原子炉実験所学術講演会報文集   Vol. 40th   page: 169 - 173   2006.1

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  267. MIEZE型スピンエコー装置によるSANS測定の試み (第40回京都大学原子炉実験所学術講演会)

    林田 洋寿, 日野 正裕, 北口 雅暁

    京都大学原子炉実験所学術講演会報文集   Vol. 40   page: 163 - 168   2006.1

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  268. 中性子光学機器の開発と新型分光器・イメージングへの展開 (第40回京都大学原子炉実験所学術講演会)

    川端 祐司, 日野 正裕, 北口 雅暁

    京都大学原子炉実験所学術講演会報文集   Vol. 40   page: 21 - 30   2006.1

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  269. 実効1MHz MIEZEシグナルの観測

    HAYASHIDA HIROTOSHI, KITAGUCHI MASAAKI, HINO MASAHIRO, KAWABATA YUJI, EBISAWA TOORU

    日本中性子科学会年会講演概要集   Vol. 6th   page: 50   2006

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  270. 高曲率曲導管を用いたJ‐PARC冷中性子ビームポートの設計と遮蔽評価

    EBISAWA TOORU, YAMAZAKI DAI, MARUYAMA RYUJI, SOYAMA KAZUHIKO, TASAKI SEIJI, ABE YUTAKA, HINO MASAHIRO, KITAGUCHI MASAAKI, HAYASHIDA HIROTOSHI, KAWABATA YUJI, TORIKAI NAOYA, NIITA KOJI

    日本中性子科学会年会講演概要集   Vol. 6th   page: 56   2006

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  271. 5Q<sub>c</sub>中性子偏極スーパーミラーの開発と低磁場駆動化の試み

    HINO MASAHIRO, KITAGUCHI MASAAKI, KAWABATA YUJI, HAYASHIDA HIROTOSHI, TASAKI SEIJI, MARUYAMA RYUJI, EBISAWA TOORU

    日本中性子科学会年会講演概要集   Vol. 6th   page: 61   2006

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  272. Development of Resonance Spin Flipper for NRSE Spectrometer at Pulsed Source Reviewed International journal

    M. Kitaguchi, M. Hino, Y. Kawabata, H. Hayashida, S. Tasaki, R. Maruyama, D. Yamazaki, T. Ebisawa

    Proceedings of Recent Studies and Developments of Neutron Spin Echo Spectroscopy (NSE2006)     page: 0 - 0   2006

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  273. J‐PARC共鳴スピンエコー装置のためのデバイス開発―共鳴スピンフリッパーの改良―

    KITAGUCHI MASAAKI, HINO MASAHIRO, KAWABATA YUJI, HAYASHIDA HIROTOSHI, TASAKI SEIJI, EBISAWA TOORU

    日本中性子科学会年会講演概要集   Vol. 6th   page: 61   2006

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  274. Development of MIEZE type neutron resonance spin echo spectrometer:The concept and present status of divice development

    HINO MASAHIRO, KITAGUCHI MASAAKI, HAYASHIDA HIROZTOSHI, KAWABATA YUJI, TASAKI SEIJI, MARUYAMA RYUJI, YAMAZAKI DAI, EBISAWA TORU

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2006 ( 0 ) page: 92 - 92   2006

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    DOI: 10.11561/aesj.2006s.0.92.0

  275. Development of MIEZE type neutron resonance spin echo spectrometer II

    HAYASHIDA Hirotoshi, HINO Masahiro, KITAGUCHI Masaaki, KAWABATA Yuji, EBISAWA Toru, SUGIYAMA Masaaki, TASAKI Seiji, YAMAZAKI Dai, MARUYAMA Ryuji

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan   Vol. 2006 ( 0 ) page: 93 - 93   2006

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    DOI: 10.11561/aesj.2006s.0.93.0

  276. Medium modification on vector mesons observed in 12 GeV p + A reactions Reviewed

    M. Naruki, H. En'yo, R. Muto, T. Tabaru, S. Yokkaichi, Y. Fukao, H. Funahashi, M. Ishino, H. Kanda, M. Kitaguchi, S. Mihara, K. Miwa, T. Miyashita, T. Murakami, T. Nakura, F. Sakuma, M. Togawa, S. Yamada, Y. Yoshimura, J. Chiba, M. Ieiri, O. Sasaki, M. Sekimoto, K.H. Tanaka, H. Hamagaki, K. Ozawa

    AIP Conference Proceedings   Vol. 870   page: 503 - 505   2006

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    DOI: 10.1063/1.2402687

  277. Performance Test of High Frequency Resonance Spin Flipper for Pulsed Source on MIEZE and NRSE

    H. Hayashida, M. Kitaguchi, M. Hino, Y. Kawabata

    Proceedings of the 6th Korea-Japan Meeting on Neutron Science     page: 168 - 171   2006

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  278. J‐PARC中性子共鳴スピンエコー分光器の概念設計II

    HINO MASAHIRO, KAWABATA YUJI, TASAKI SEIJI, MARUYAMA RYUJI, KITAGUCHI MASAAKI, EBISAWA TOORU, ACHIWA NORIO

    日本原子力学会春の年会要旨集   Vol. 43rd   page: 133   2005.3

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  279. 中性子スピン干渉原理に基づく中性子スピンエコー群開発計画

    KAWABATA YUJI, HINO MASAHIRO, TAZAKI SEIJI, KITAKUCHI MASAAKI, MARUYAMA RYUJI, EBISAWA TOORU, SETO HIDEKI, YAMAZAKI HIROSHI, NAGAO MICHIHIRO, KANAYA TOSHIHARU

    KEK Proc   ( 2004-17 ) page: 175 - 190   2005.3

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  280. J-PARC中性子共鳴スピンエコー装置群の概念設計 (京都大学原子炉実験所第39回学術講演会 報文集)

    日野 正裕, 川端 祐司, 北口 雅暁

    京都大学原子炉実験所学術講演会報文集   Vol. 39   page: 208 - 212   2005.1

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  281. J‐PARC共鳴スピンエコー装置のためのデバイス開発―高周波スピンフリッパー―

    KITAGUCHI MASAAKI, HINO MASAHIRO, KAWABATA YUJI, MARUYAMA RYUJI, YAMAGUCHI RYU, TASAKI SEIJI, EBISAWA TOORU

    京都大学原子炉実験所学術講演会報文集   Vol. 39th   page: 191 - 194   2005.1

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  282. 中性子スピン干渉原理に基づく中性子スピンエコー装置群開発プロジェクト

    KAWABATA YUJI, HINO MASAHIRO, MARUYAMA RYUJI, KITAGUCHI MASAAKI, SETO HIDEKI, NAGAO MICHIHIRO, KANAYA TOSHIHARU, YAMAZAKI DAI, EBISAWA TOORU

    京都大学原子炉実験所学術講演会報文集   Vol. 39th   page: 113 - 118   2005.1

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  283. 中性子共鳴スピンエコー分光器のためのビーム発散補正法

    MARUYAMA RYUJI, HINO MASAHIRO, KITAGUCHI MASAAKI, EBISAWA TOORU, TASAKI SEIJI, KAWABATA YUJI

    京都大学原子炉実験所学術講演会報文集   Vol. 39th   page: 185 - 190   2005.1

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  284. 21aYM-2 中性子共鳴スピンエコー分光器の開発I(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))

    日野 正裕, 北口 雅暁, 川端 祐司, 林田 洋寿, 田崎 誠司, 山崎 大, 丸山 龍治, 海老沢 徹, 阿知波 紀郎

    日本物理学会講演概要集   Vol. 60 ( 0 ) page: 819 - 819   2005

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    DOI: 10.11316/jpsgaiyo.60.2.4.0_819_3

  285. 21aYM-3 Development of Neutron Resonance Spin Flipper for High Resolution NRSE Spectrometer

    Kitaguchi Masaaki, Hino Masahiro, Kawabata Yuji, Hayashida Hirotoshi, Tasaki Seiji, Maruyama Ryuji, Yamazaki Dai, Ebisawa Toru, Torikai Naoya

    Meeting Abstracts of the Physical Society of Japan   Vol. 60 ( 0 ) page: 819 - 819   2005

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    DOI: 10.11316/jpsgaiyo.60.2.4.0_819_4

  286. Development Project of Neutron Resonance Spin Echo for Pulse Neutron Source Reviewed International journal

    Y. Kawabata, M. Hino, M. Kitaguchi, R. Maruyama, S. Tasaki, T. Ebisawa, D. Yamazaki, H. Seto, M. Nagao, T. Kanaya

    Proc. Int. Symp. Research Reactor and Neutron Science     page: 757 - 759   2005

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  287. 中性子共鳴スピンエコー分光器の開発Ⅰ

    日野正裕, 北口雅暁, 川端祐司, 林田洋寿, 田崎誠司, 山崎大, 丸山龍治, 海老澤徹, 阿知波紀朗

    日本物理学会、2005年秋季大会     2005

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  288. 12pTJ-6 Development of Mach-Zehnder interferometer for cold neutrons using multilayer mirrors : Coherent beam steering using quadrupole magnets

    Taketani K, Funahashi H, Hino M, Kitaguchi M, Maruyama R, Otake Y, Shimizu H. M

    Meeting abstracts of the Physical Society of Japan   Vol. 59 ( 2 )   2004.8

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  289. Development of NiC/Ti supermirror and monochromator using ion beam sputter instrument at KURRI

    M. Hino, H. Yoshimura, R. Maruyama, S. Tasaki, H. Yoshino, M. Kitaguchi, Y. Kawabata, T. Krist

    KURRI Progress Report     page: 149   2004.4

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  290. 高周波スピンフリッパーのための磁場計算

    YAMAGUCHI RYU, MARUYAMA RYUJI, HINO MASAHIRO, KITAGUCHI MASAAKI, KAWABATA YUJI

    日本中性子科学会年会講演概要集   Vol. 4th   page: 66   2004

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  291. Schematic design of neutron resonance spin echo spectrometers for J-PARC

    HINO MASAHIRO, TASAKI SEIJI, MARUYAMA RYUJI, EBISAWA TORU, KITAGUCHI MASAAKI, KAWABATA YUJI

    Proceedings of AESJ   Vol. 2004 ( 0 ) page: 109 - 109   2004

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    Language:Japanese   Publisher:Atomic Energy Society of Japan  

    中性子散乱は、物質研究に対する最も有力な手段の一つであり、現在、世界最高性能を有する大強度パルス中性子源(J-PARC)が東海村に建設中である。中性子スピンエコー法は、中性子のスピンという自由度を導入したことにより、入射中性子のエネルギー分解能に制限されること無く、高エネルギー分解能かつ高中性子強度を同時に実現する。その結果、分子鎖のサイズに対応する空間分解能が約0.1 - 100nm において、NMR等の他の分光法では測定不可能であったエネルギー分解能 5x10-9 - 2x10-3 eVの動的過程が観測できる。我々は中性子スピン干渉の原理を用いることで従来のスピンエコー装置の設計概念を大幅に改良し[3]、J-PARCに最適なスローダイナミックス研究の分光器を提案している。本講演では、そのJ-PARCに装置設置を提案している中性子共鳴スピンエコー分光器群の概要を紹介をする。

  292. J‐PARC共鳴スピンエコー装置のためのデバイス開発―高周波スピンフリッパー―

    KITAGUCHI MASAAKI, HINO MASAHIRO, KAWABATA YUJI, MARUYAMA RYUJI, YAMAGUCHI RYU, TASAKI SEIJI, EBISAWA TOORU

    日本中性子科学会年会講演概要集   Vol. 4th   page: 115   2004

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    J-GLOBAL

  293. イオンビームスパッタ法による偏極ミラーの開発

    HINO MASAHIRO, YOSHIMURA YU, TAKEDA MASAYASU, TORIKAI NAOYA, KAWABATA YUJI, KITAGUCHI MASAAKI, MARUYAMA RYUJI, YAMAGUCHI RYU, TASAKI SEIJI

    日本中性子科学会年会講演概要集   Vol. 4th   page: 64   2004

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    J-GLOBAL

  294. 中性子共鳴スピンエコー分光器のためのビーム発散補正法

    MARUYAMA RYUJI, HINO MASAHIRO, KITAGUCHI MASAAKI, EBISAWA TOORU, TAZAKI SEIJI, KAWABATA YUJI

    日本中性子科学会年会講演概要集   Vol. 4th   page: 115   2004

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    J-GLOBAL

  295. Beam Splitting Etalon を用いた冷中性子干渉光学系と応用

    北口雅暁, 舟橋春彦, 名倉照直, 竹谷薫, 名倉照直, 日野正裕, 田崎誠司, 丸山龍治, 清水裕彦

    日本中性子科学会 2003 年年会     2003

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    Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)  

  296. Nuclear media effects on production and decay of vector meson studied in 12 GeV p+A reacion

    H. Enyo, J. Chiba, H. Funahashi, H. Hamagaki, M. Ieiri, M. Ishino, H. Kanda, M. Kitaguchi, S. Mihara, T. Miyashita, T. Murakami, R. Muto, M. Naruki, M. Nomachi, K. Ozawa, F. Sakuma, O. Sasaki, H.D. Sato, M. Sekimoto, T. Tabaru, K.H. Tanaka, S. Yadama, S. Yokkaichi, Y. Yoshimura

    Progress of Theoretical Physics Supplement   Vol. 149   page: 49 - 55   2003

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KAKENHI (Grants-in-Aid for Scientific Research) 29

  1. 中性子干渉計を用いた暗黒宇宙の多角的研究

    Grant number:21H01092  2021.4 - 2024.3

    日本学術振興会  科学研究費補助金  基盤研究(B)

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    Authorship:Principal investigator 

    Grant amount:\15860000 ( Direct Cost: \12200000 、 Indirect Cost:\3660000 )

  2. 中性子干渉光学の応用によるスピンエコー装置の開発と冷中性子ビームの高度利用

    Grant number:17760055  2005 - 2006

    科学研究費助成事業  若手研究(B)

    北口 雅暁

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\2400000 ( Direct Cost: \2400000 )

    中性子共鳴スピンエコー法では共鳴スピンフリッパーによってスピンアップ・ダウン状態間に波数差をつけ、スピンフリッパー間を飛行する間に位相差を蓄積する。スピンフリッパーに適用する振動磁場の周波数が高い程波数差は大きくなり、装置のエネルギー分解能は向上する。今年度は次のような成果を得た。
    1 高周波化させた共鳴フリッパーを用いて実効1MHzのMIEZE型スピンエコー分光装置を構築した。分解能を示すフーリエ時間は1.7nsecであり、MIEZE型としては世界最高である。
    2 安定的に動作させるためにフリッパー形状を最適化した。実効110kHzから600kHzまでMIEZEを安定して測定できる。現在この装置を用いた物性実験を開始している。
    3 高分解能スピンエコー装置に対するビーム発散補正法を検討した。フリッパー間で蓄積される位相差はビームの入射角によってばらつく。これを補正する磁場形状を提案し、シミュレーションによってその可能性を示した。
    多層膜を用いた冷中性子干渉計は長波長中性子を利用でき、微小相互作用を検出するのに有利である。装置の大型化と、基礎物理への応用をめざし、次のような研究を行った。
    1 ギャップ200μmのビームスプリッティングエタロンを用いた干渉計の光学経路を詳細に調べた。
    2 ビームスプリッティングエタロンを白色中性子に対応させるには、中性子ミラーをスーパーミラー化する必要がある。干渉計構築にはより低磁場で磁化する磁性体ミラーが必要だが、蒸着とイオンビームスパッタ法を用いてスーパーミラーを作成し、中性子反射・磁化特性を調べた。

  3. Epithermal Neutron Spin Optics in Spin Polarized Nuclear Target for the Study of the Breaking of Space-time Inversion

    Grant number:24H00222  2024.4 - 2027.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

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    Authorship:Coinvestigator(s) 

  4. Low loss transport of slow neutrons with precision phase space manipulation

    Grant number:23K28348  2023.4 - 2026.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  5. Low loss transport of slow neutrons with precision phase space manipulation

    Grant number:23H03659  2023.4 - 2026.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship:Coinvestigator(s) 

  6. Search for new interaction in the sub-micron range via neutron scattering off hydrogen-absorbed nano-particles

    Grant number:23K22502  2022.4 - 2026.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship:Coinvestigator(s) 

  7. Search for new fundamental interactions in sub-micron region via neutron scattering with hydrogen-absorbing nanoparticles

    Grant number:22H01231  2022.4 - 2026.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  8. Development of a Spin Analyzer for the Neutron Eletric Dipole Moment Search International coauthorship

    Grant number:23K22507  2022.4 - 2025.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  9. Solving the Neutron Lifetime Puzzle -Advanced Event Selection Using Polarized Neutron Decay Asymmetry-

    Grant number:22H00140  2022.4 - 2025.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  10. Development of a Spin Analyzer for Neutron Electric Dipole Moment Search with Ultra Cold Neutron

    Grant number:22H01236  2022.4 - 2025.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  11. ソレノイド磁場で実現する新しい手法による中性子寿命問題の解明

    Grant number:21H04475  2021.4 - 2025.3

    科学研究費助成事業  基盤研究(A)

    吉岡 瑞樹, 三島 賢二, 槇田 康博, 北口 雅暁

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    中性子は最も単純な原子核の一つであり、およそ900秒で電子、陽子、反ニュートリノに崩壊する。その崩壊寿命は素粒子標準理論の精密検証において不可欠なパラメータであるが、測定手法間に3.8標準偏差の有意な乖離が見られている。この乖離は「中性子寿命問題」と呼ばれており、未知の現象に起因する可能性が議論されている。我々は茨城県東海村の陽子加速器施設J-PARCの大強度中性子ビームを用いて、既存の手法とは異なる測定方法により中性子寿命を高精度で決定する実験を提案している。本研究は、研究期間内に0.1%の精度で中性子寿命を測定し、中性子寿命問題が未知の現象に起因するか否かに決着をつけることを目的とする。
    中性子は最も単純な原子核の一つであり、およそ900秒で電子、陽子、反ニュートリノに崩壊する。その崩壊寿命は素粒子標準理論およびビッグバン元素合成理論の精密検証において不可欠なパラメータであるが、測定手法間に3.8標準偏差の有意な乖離が見られている。この乖離は「中性子寿命問題」と呼ばれており、未知の現象に起因する可能性が真剣に議論されている。この問題を解決すべく、申請者らは茨城県東海村の陽子加速器施設JPARCの大強度中性子ビームを用いて、既存の手法とは異なる測定方法により中性子寿命を高精度で決定する新しい実験を提案している。本実験では新型ガス検出器とソレノイド磁場を組み合わせ、従来最も支配的であった背景事象を大幅に低減できる。
    <BR>
    これまでの研究で新規検出器の基本開発が完了しているが、本年度は未対応項目への措置を行った。入射中性子がガス検出器中の動作ガスにより散乱され、検出器部材との吸収反応により発生するガンマ線背景事象を抑制する必要がある。そのため、ガンマ線発生確率が著しく低い6フッ化リチウムで検出器内部を覆うことを検討してきた。本年度は6フッ化リチウム壁の詳細設計および設置方法の検討を行ない、実際に検出器実機に組み込んだ。また、荷電粒子検出面に高電圧を印加する必要があるが、これまで放電現象が見られていた。放電箇所への対応を行い、本実験実施に十分な高電圧が印加できることを確認した。以上により、本実験実施可能な新規検出器の開発が完了した。次年度には、実験中に必須なエネルギー校正システムを検出器実機に組み込む。
    本実験実施可能な新規検出器の開発が完了し、当初の計画通り次年度に中性子ビーム照射を実施予定である。
    本実験中に必須である、エネルギー校正システムを検出器に組み込む。検出器群をビームラインに設置し、物理実験を遂行する。

  12. ソレノイド磁場で実現する新しい手法による中性子寿命問題の解明

    Grant number:21H04475  2021.4 - 2025.3

    日本学術振興会  科学研究費補助金  基盤研究(A)

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    Authorship:Coinvestigator(s) 

  13. 中性子干渉計を用いた暗黒宇宙の多角的研究

    Grant number:21H01092  2021.4 - 2024.3

    科学研究費助成事業  基盤研究(B)

    北口 雅暁, 細畠 拓也, 日野 正裕

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\15860000 ( Direct Cost: \12200000 、 Indirect Cost:\3660000 )

    「中性子干渉計」を開発し宇宙進化の鍵である「暗黒エネルギー」を多角的に研究する。質量を持つ物体間の未知の相互作用を詳細に調べるために、質量を持ち電磁気相互作用が小さい中性子を試験粒子として用いる。
    中性子干渉計は相互作用を波動の位相変化として捉えるもので、その位相変化は波長に比例する。長波長パルス中性子を用いることで感度を向上させ系統誤差を抑制する。J-PARCから得られる世界最大強度の中性子ビームと組み合わせることで、暗黒エネルギーに対する探索感度を従来の1桁から2桁向上させる。開発した干渉計を用いて、核力相互作用の精密測定・重力の量子力学的干渉効果、未知短距離力探索などを行う。
    多層膜冷中性子干渉計の改良を進めた。利用波長帯域を拡大するための、干渉計用スーパーミラーを開発した。研究用原子炉JRR3のビームラインMINEにてミラーの反射特性を測定し、波長帯域を確認した。これを利用した干渉計を作成中である。微小位相測定・位相ノイズ模擬実験のための、位相変調装置を試作し動作確認を行っている。J-PARC中性子ビームラインにて、いくつかの物質の中性子散乱長の測定を試験し、結果を解析・論文の準備中である。
    利用波長帯域を拡大するための、干渉計用スーパーミラーを開発した。研究用原子炉JRR3のビームラインMINEにてミラーの反射特性を測定した。当初の要求を満たす波長帯域をカバーできることを確認した。このミラーをビームスプリッターとして昨日させる素子「中性子ビームスプリッティングエタロン」を、現在作成中である。
    探索すべき相互作用による微小な位相変化を模擬したり、外乱によって振動するような位相ノイズを模擬するための、位相変調装置を共同研究によって試作し、動作確認を行っている。まもなくJ-PARC中性子ビームラインでのテスト実験を行う予定であり、実験準備をすすめた。
    暗黒エネルギーの探索のための基礎データである、原子核の中性子散乱長測定の実証実験をおこなった。我々の干渉計が装置として十分な精度を出せることを確認した。一方、絶対値を出すためには試料の形状や不純物の定量の精度を向上させる必要があることがわかった。
    引き続き、J-PARC中性子ビームラインにて多層膜冷中性子干渉計を改良し、本測定が可能な装置として完成させる。特に利用波長帯域を拡大した干渉計用スーパーミラーを搭載させる。ピエゾステージを利用した大型干渉計の開発を行い、暗黒エネルギー探索に挑戦する。原子核散乱長の測定においては、我々の干渉計の性能を十分発揮できるよう、試料の形状や不純物の高精度な測定を行う。実際に散乱長の高統計測定を行う。またガスによる位相変化測定のためのガスセルや重力実験のためのジグなどを開発し、試験する。結果を論文にまとめて公表する。

  14. Measurement of the neutron lifetime using pulsed neutron beams at J-PARC : Resolving the neutron lifetime puzzle

    Grant number:19H00690  2019.4 - 2022.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    Mishima Kenji

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    The neutron lifetime is a very important parameter for understanding the nucleosynthesis in the early universe or the standard model of the elementary particles. In this study, the neutron lifetime was measured by using a gas detector to detect electrons from neutron decays using pulsed neutrons at J-PARC, which is a different method from existing experiments. As the first result of this experiment, we obtained the neutron lifetime of 896 ± 10 (stat.) +15/-18 (syst.) [s]. This accuracy does not allow us to mention which of the two methods is correct. To solve this problem, we enhanced the amount of neutrons and reduced the systematic uncertainties to improve the accuracy of the experiment.

  15. Search for new interaction via neutron-nano-particle scattering

    Grant number:19H01927  2019.4 - 2022.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Shima Tatsushi

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    The small-angle neutron scattering (SANS) is useful to search for gravity-like new interactions in the sub-micron range, since it is free from the disturbances by the electromagnetic interaction. In this research, nano-particles were employed as the target of SANS, since the experimental sensitivity to new interactions are enhanced by six orders of magnitude thanks to the coherent scattering. To suppress the background due to nuclear scattering, we developed nano-particles made of vanadium whose coherent neutron scattering cross section is minimum among all the elements. With this material, a SANS experiment was performed at the J-PARC, achieving the sensitivity comparable to the previous experiments. To get a more better sensitivity, we developed nano-particles having extremely small neutron scattering cross section by mixing vanadium and nickel that have opposite signs of coherent scattering lengths. The SANS experiment with this new material is scheduled in June, 2022.

  16. Precision measurement of nuclear reactions with polarized neutrons for time-reversal violation search

    Grant number:17H02889  2017.4 - 2020.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Kitaguchi Masaaki

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\16120000 ( Direct Cost: \12400000 、 Indirect Cost:\3720000 )

    A high performance neutron polarizer with 3He was developed and installed into the beamline BL04 ANNRI in J-PARC. The angular distribution of gamma rays from neutron capture reaction of 139La was clearly observed with the polarized epithermal neutrons. The distributions with polarized and unpolarized neutrons were analyzed with the theory for nuclear reactions. The results tells us that the large enhancement of time-reversal violation in nuclear reaction can be used for search for new physics beyond the standard model with the sensitivity as high as neutron electric dipole moment search.

  17. Neutron lifetime measurement using pulsed neutron beam at J-PARC

    Grant number:16H02194  2016.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    Mishima Kenji

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    The neutron lifetime is a very important parameter to understand nucleosynthesis in the early universe or the standard model of the elementary particles. The neutron lifetime was determined by the beam method, which counts the number of neutrons and the number of decays per unit time, or storaging method, which measures the decay time of storaged ultra cold neutrons.
    The results of the two types of methods gave a discrepancy of 8.4 seconds (4σ), and the solution of this problem is an urgent issue. In order to solve this problem, we have developed a new method for precise measurement of the neutron lifetime. The experiment was performed using J-PARC pulsed neutrons with a gas detector to count the decay electron with mixed 3He to measure the neutron flux. As the results, the neutron lifetime was obtained as 896±10 (statistical error) +14/-10 (strain error) [s] by detecting neutron decay electrons .

  18. Search for neutron electric dipole moment with crystal diffraction

    Grant number:16K13804  2016.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    Kitaguchi Masaaki, ITOH Shigeyasu, NAKAJI Masaya, UCHIDA Yuya

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    Authorship:Principal investigator 

    Grant amount:\3120000 ( Direct Cost: \2400000 、 Indirect Cost:\720000 )

    Neutron electric dipole moment (EDM) is an important probe to search for new physics beyond standard model. Search for EDM with crystal diffraction is advantageous according to the extremely strong effective electric field inside the crystal.
    We observed Pendellosung interference fringes using pulsed cold neutrons in J-PARC for the first time. This means the establishment of the fundamental technique to search for the neutron EDM with crystal diffraction. We are continuing the development of the experimental setup with polarized neutron beamline to measure the internal electric field of the crystals. The measurement of the electric field in non-centrosymmetric crystal has been started.

  19. Study towards next-generation experiment for Supersymmetry using storage of the ultra-cold-neutron with world highest density

    Grant number:26247035  2014.4 - 2017.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    Yamashita Satoru, SHIMIZU Hirohiko, SHIMA Tatsushi, INO Takashi, MISHIMA Kenji, IMAJO Sohei, KATAYAMA Ryo

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    In order to measure the electric dipole moment of neutrons which is one of the major targets of present elementary particle physics, we have achieved (A) the developments of technology for the optical materials and numerical analysis scheme for the transportation and storage of ultra-cold-neutron (UCN), essential for controlling systematic errors, and (B) succeeded in developing UCN acceleration / deceleration device. In particular, we have succeeded; 1) improvement of core of Geant 4 and introducing non-specular reflection model, 2) measurements of the reflective potential and non-specular reflection component for many samples, and development of superior material with the world's highest level of reflection by deuterated-diamond-coating, 3) measuring J-PARC's first UCN storage experiment and accumulation efficiency, 4) develop a system to accelerate and decelerate UCN and controlling the velocity distribution of UCN from existing Doppler shifter, for the first time at J-PARC.

  20. An experimental test of the inverse-square law of the gravitation using low energy neutron scattering

    Grant number:25800152  2013.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    YOSHIOKA Tamaki, KITAGUCHI Masaaki, MISHIMA Kenji, SHIMIZU Hirohiko, SHIMA Tatsushi, INO Takashi

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    We have successfully selected the candidate material for the target gas chamber and optimized the experimental setup using newly developed simulation code. Based on the result, all experimental apparatus have been constructed and installed to the beam line. We unfortunately could not perform data taking due to J-PARC regulation. The experiment will be carried out within the next fiscal year.

  21. Development for a Next-Generation Experiment to Study Super Symmetry using Accumulation of the Highest Density Ultra-Cold-Neutron

    Grant number:23244047  2011.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    YAMASHITA Satoru, KITAGUCHI Masaaki, SHIMIZU Hirohiko, SHIMA Tatsushi, IWASHITA Yoshihisa, INO Takashi, MISHIMA Kenji

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    We have achieved major steps to realize the next generation particle physics experiment using an ultra-cold-neutron (UCN), neutrons having very low kinetic energy, in order to study fundamental low of Nature. Following three achievements are highlighted. 1) Developments of materials "UCN reflectors" for the transportation and accumulation of UCN: Especially, a diamond-like-carbon with deuterium satisfies the requirements of the next generation experiment. 2) Development of world brand new device "UCN rebuncher" which controls neutron velocity using the interaction between magnetic field and magnetic moment: We have succeeded to develop the system and verify its performance. 3) Development of Geant4-base simulation software to cope with neutron interactions with a magnetic field and that with surface of materials: The code simulates the transportation and accumulation of UCN with an accuracy of one order higher, which is necessary to design the system of the next generation experiment.

  22. Development of fabrication technique for a two-dimensional neutron focusing mirror and the performance test

    Grant number:23360428  2011.4 - 2014.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    HINO Masahiro, KITAGUCHI Masaaki, KAWABATA Yuji, SUGIYAMA Masaaki

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    We have succeeded in fabricating large-scale self-supporting high-m neutron supermirror and very small d-spacing multilayer sheets using ion beam sputtering (IBS) instrument at KURRI. Before this study, the maximum deposition size at the KUR-IBS was limited to 200 mm in diameter and it was not enough large to fabricate neutron guide tube. In this study, we have developed new fabrication techniques and enlarged the maximum size to 460 mm in diameter. This result was a significant contribution to build a new beam line at BL06 at J-PARC and improve SANS monochromators at KURRI. The supermirror sheet was peeled off by using replica technique and the reflectivity was almost same with that of supermirror fabricated by usual process. The sheet is self-supporting and one of ideal focusing device without support material. However, the shape control is still difficult. We studied the scope of application and so far another technique is more promising in case of low-Qc(m<4) with small curvature.

  23. Development of very-cold-neutron interferometer components toward search for exotic short-range force

    Grant number:21340048  2009 - 2011

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    SANUKI Tomoyuki, KITAGUCHI Masaaki

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    We have developed some indispensable components for realization of very-cold neutron interferometer, which would be a tool to search for exotic short-range force. Those components were aligned precisely, using a white light fringe pattern.

  24. 中性子スピン干渉を利用した小角散乱分光法の開発

    Grant number:21656237  2009 - 2010

    日本学術振興会  科学研究費助成事業  挑戦的萌芽研究

    日野 正裕, 北口 雅暁

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    本研究では中性子スピンの位相を精密に制御することで、検出器の位置分解能よりも高分解能な小角散乱分光法(SANS)を提案し、実験で評価することが目的である。その実現にはJST先端計測分析技術・機器開発事業の支援を受けて、世界で初めて開発に成功した電磁石を用いた共鳴スピンフリッパーコイル(RSF)による高分解能MIEZE型スピンエコー分光器の基本部品と技術を応用することでめざした。実験は日本原子力研究開発機構C3-1-2-2ポート(MINE1)において行った。RSFと2次元検出器を傾けた状態でMIEZEシグナルの観測に成功した。しかしRSFの電磁石の静磁場の均一度やもれ磁場の干渉により、振動磁場を斜めに傾ける方法では高分解能化が難しいことが分かった。また振動磁場コイルを斜めにする手法は異方性のある試料に関しては、少なくとも90度回転させて、0と90度の2回は測定することが必要であるが、このことは、磁場をかけることが有効な試料の道も閉ざす。これはMIEZE型では試料の後方には検出器しか必要無いため、磁場環境からもフリーになり磁気散乱の測定も容易であるメリットを活かせなくなる。この様な実験検討から、電磁石RSFのメリットを活かし、高分解能な小角散乱測定を行うには振動磁場コイルを斜めに配置するよりも、ビームに対して垂直にし、集光デバイスを用いてビームの軌跡をより精密に制御する方が有効なことが明らかになった。そこで今回は新たにフレキシブルな高性能な中性子スーパーミラーシートの開発に成功して(特許出願)、集光デバイスを安価に製作できる可能性を示した。また実機でMIEZE-SANSの検討のために、安価な磁気ミラーホルダーの開発、及びそれを用いた長尺(L=60cm)で3.5Qcの透過型偏極スーパーミラーの開発に成功した。

  25. Development of high-performance devices using neutron coherent optics for intense pulsed neutrons

    Grant number:21760050  2009 - 2010

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    KITAGUCHI Masaaki

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\2990000 ( Direct Cost: \2300000 、 Indirect Cost:\690000 )

    Neutron interferometer has the advantage for fundamental physics experiments, for example, precision measurement of Aharonov-Chaser effect. It is important that high precision measurements using intense pulsed neutrons. We developed optical devices applicable to pulsed neutrons. Clear interference fringes were observed using time-of-flight method at beam line BL05 in J-PARC MLF.
    Neutron spin echo (NSE) spectrometer is one of the techniques for quasi-elastic scattering with the highest energy resolution. We developed high frequency resonance spin flippers for pulsed neutrons. Intensity modulated spin echo signals, which are called as MIEZE signals, were observed according to the time-of-flight at beam line BL05 in J-PARC MLF. We plan to construct the spectrometers for practical use at J-PARC. We are also developing the compact devices for spin echo option for various spectrometers.

  26. Research of the World-Highest Density Source of the Ultra-Cold Neutron for Study of Supersymmetry

    Grant number:20340051  2008 - 2010

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    YAMASHITA Satoru, KITAGUCHI Masaaki, SHIMIZU Hirohiko, SHIMA Tatsushi, IWASHITA Yoshihisa, YOSHIOKA Tamaki, INO Takashi

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid)  Grant type:Competitive

    An innovative new type of method is designed through this research program to produce world-highest density ultra-cold neutron (UCN), combining pulsed-beam from an accelerator and time-dependent control of the neutron velocity. We have proposed a new experiment using this scheme with J-PARC accelerator LINAC. In order to start R&D for the realization of the scheme, a turbine-type UCN generator is developed. We have formed a new group of researchers to collaborate to realize the experiment.

  27. Fundamental Physics using Neutron Optics

    Grant number:19GS0210  2007 - 2011

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Creative Scientific Research

    SHIMIZU Hirohiko, INO Takashi, MUTO Suguru

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    Authorship:Coinvestigator(s) 

    Cold neutron beam line BL05 was constructed at J-PARC. Various experiments including precision measurement of neutron lifetime was started with the high quality beam, which is provided by using our neutron optical devices. Developments of the devices, for example, space-time focusing of ultra-cold neutrons, enables us to perform extremely high precision measurement for physics beyond the standard model. For material science, we also developed some new neutron spectrometers including focusing VCN-SANS and resonance NSE.

  28. Development of polarizing neutron supermirror for lower external magnetic field and estimation of its magnetic property

    Grant number:19560841  2007 - 2008

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    MASAHIRO Hino, KITAGUCHI Masaaki

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  29. Development of devices and spectrometer using neutron coherent optics for intense pulsed neutrons

    Grant number:19760046  2007 - 2008

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    KITAGUCHI Masaaki

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\2210000 ( Direct Cost: \2000000 、 Indirect Cost:\210000 )

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Teaching Experience (On-campus) 1

  1. 物理学基礎II

    2017

     詳細を見る

    電磁気学の基礎を概観する。

Teaching Experience (Off-campus) 7

  1. 先端物理学基礎(2年)

    名古屋大学理学部)

  2. 高エネルギー物理学(大学院)

    名古屋大学理学研究科)

  3. 素粒子宇宙物理研究のための実験観測技術入門

    名古屋大学理学研究科)

  4. 物理学演習(2年)

    名古屋大学理学部)

  5. 物理学実験(大学院)

    京都大学工学研究科)

  6. 物理学実験(3年)

    名古屋大学理学部)

  7. 物理学実験(1年)

    名古屋大学理学部)

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Social Contribution 12

  1. School visit

    Role(s):Lecturer

    Ise High School  2022.10

  2. School visit

    Role(s):Lecturer

    Nanzan High School  2022.10

  3. School visit

    Role(s):Lecturer

    Ise High School  2021.11

  4. School visit

    Role(s):Lecturer

    Ise High School  2020.10

  5. School visit

    Role(s):Lecturer

    Ise High School  2019.10

  6. School visit

    Role(s):Lecturer

    Hida High School  2019.5

  7. School visit

    Role(s):Lecturer

    Ise High School  2018.10

  8. School visit

    Role(s):Lecturer

    Ise High School  2017.10

  9. School visit

    Role(s):Lecturer

    Ise High School  2016.9

  10. School visit

    Role(s):Lecturer

    Ise High School  2015.9

  11. KMI public lecture

    Role(s):Presenter

    Kobayashi Maskawa Institute, Nagoya University  2015.4

  12. Kagaku-zammai

    Role(s):Demonstrator

    Aichi Pref.  2013.12

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