Faculty Profiles - SHIMIZU Hirohiko

Papers - SHIMIZU Hirohiko

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26aSF-4 Measurement of the electric dipole moment of a neutron by the diffraction of the BGO crystal

Itoh Shigeyasu, Kitaguchi Masaaki, Shimizu Hirohiko

Meeting Abstracts of the Physical Society of Japan Vol. 70.2 ( 0 ) page： 250 2015

21pDF-11 Search for New Physics using the Enhancement of CP-violation Effects in Compound Nuclei

SHIMIZU Hirohiko M., KITAGUCHI Masaaki, HIROTA Katsuya, ICHIKAWA Go, INO Takashi, ASAHI Koichiro, MOMOSE Takamasa, IWATA Takahiro, SAKAI Kenji, HINO Masahiro, YOSHIOKA Tamaki, SHIMA Tatsushi, YAMAGATA Yutaka

Meeting Abstracts of the Physical Society of Japan Vol. 70.1 ( 0 ) page： 70 2015

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. 70.1 ( 0 ) page： 66 2015

21aDL-4 Development of Multilayer Neutron Interferometer for Measurement of Gravitationally Induced Phases

Seki Y., Kitaguchi M., Hino M., Shimizu H. M., the NOP Collaboration

Meeting Abstracts of the Physical Society of Japan Vol. 70.1 ( 0 ) page： 64 2015

Development of accelerator-driven compact neutron sources Open Access

Hirota K., Ichikawa G., Kitaguchi M., Kiyanagi Y., Shimizu H.M., Tsuchida K., Uritani A., Watanabe K.

6th International Particle Accelerator Conference, IPAC 2015 page： 2535 - 2536 2015

The development of a low energy neutron accelerator for rebunching pulsed neutrons Open Access

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

IPAC 2014: Proceedings of the 5th International Particle Accelerator Conference page： 751 - 753 2014.7

Publisher：IPAC 2014: Proceedings of the 5th International Particle Accelerator Conference

Low energy neutrons can be accelerated or decelerated by the technique of AFP-NMR with RF in a gradient magnetic fields. The neutrons have magnetic moments, hence their potential energy are not cancelled before and after passage of magnetic fields and their kinetic energy change finally when their spins are flipped in the fields. Nowadays most measurements of the neutron electric dipole moment (nEDM) are carried out with ultra cold neutrons (UCN), whose kinetic energies are lower than about 300 neV, and with a small storage bottle to reduce the systematic errors. In such experiments highly dense UCNs are desired. The spallation neutron sources generate high-density neutrons at the target, however, the pulsed neutrons with spread velocities are diffused in guide tubes during long beam transport. It is necessary to concentrate UCN temporally upon the bottle by controlling their velocities for nEDM experiments at those facilities. We demonstrated such rebuncher and have been developed the advanced apparatus which makes it possible to handle broader energy range UCN. The design, measured specification of the new rebuncher is described in detail.

DOI： 10.18429/JACoW-IPAC2014-MOPRI065

Open Access

Scopus

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

Mishima K., Imajo S., Hino M., Ino T., Iwashita Y., Katayama R., Kitaguchi M., Oda T., Shimizu H. M., Utsuro M., Yamashita S., Yoshioka T.

INTERNATIONAL WORKSHOP ON NEUTRON OPTICS AND DETECTORS (NOP&D 2013) Vol. 528 ( 1 ) 2014

Publisher：Journal of Physics: Conference Series

Ultracold neutrons (UCNs) are neutrons whose kinetic energy is around a few hundred nanoelectronvolts. Neutrons with such small kinetic energy can be trapped in a material vessel or magnetic fields. Because of these unique characteristics, UCNs are used for some important experiments of fundamental physics. The Doppler shifter is a device to produce UCN by slowing them down by the reflection on a mirror moving with half of the velocity of incoming neutrons. A Doppler shifter using a quadruple-stack of monochromatic supermirrors that reflects neutrons with a velocity around 68m/s [1, Hino et al.(2010)] was fabricated, and operated with a pulsed neutron source of J-PARC. An important feature of the Doppler shifter is the use of a pulsed neutron beam. Unlike in continuous neutron beams, the neutron velocity can be selected by choosing a time slice in a pulsed neutron bunch. Thus the UCN production improves by ∼80 times in the case of J-PARC. We successfully produced the UCNs by the Doppler shifter: the measured UCN production rate is consistent with the simulations. © Published under licence by IOP Publishing Ltd.

DOI： 10.1088/1742-6596/528/1/012030

Web of Science

Scopus

18aSJ-1 Determination of neutron flux for the neutron lifetime measurement at J-PARC/BL05

Mishima Kenji, Yamashita Satoru, Yamada Takahito, Katayama Ryo, Higashi Nao, Yokoyama Harumichi, Sumino Hirochika, Sakakibara Risa, Sugino Tomoaki, Hirota Katsuya, Shimizu Hirohiko M., Kitaguchi Masaaki, Tanaka Genki, Sumi Naoyuki, Otono Hidetoshi, Yoshioka Tamaki, Kitahara Ryunosuke, Iwashida Yoshihisa, Oide Hidetoshi, Shima Tatsushi, Seki Yoshichika, Ino Takashi, Taketani Kaoru

Meeting Abstracts of the Physical Society of Japan Vol. 69.2.1 ( 0 ) page： 18 2014

18aSJ-2 Evaluation of improved TPC detector in the neutron lifetime measurement at J-PARC/BL05

Kitahara Ryunosuke, Iwashita Yoshihisa, Yamada Takahito, Katayama Ryo, Higashi Nao, Yokoyama Harumichi, Sumino Hirochika, Mishima Kenji, Yamashita Satoru, Sakakibara Risa, Sugino Tomoaki, Hirota Katsuya, Shimizu Hirohiko M., Kitaguchi Masaaki, Tanaka Genki, Sumi Naoyuki, Otono Hidetoshi, Yoshioka Tamaki, Oide Hidetoshi, Seki Yoshichika, Shima Tatsushi, Taketani Kaoru, Ino Takashi

Meeting Abstracts of the Physical Society of Japan Vol. 69.2.1 ( 0 ) page： 18 2014

28aTR-7 Neutron lifetime measurement at J-PARC/BL05 : Present status and future outlook

Mishima Kenji, Yamashita Satoru, Yamada Takahito, Katayama Ryo, Higashi Nao, Yokoyama Harumichi, Sumino Hirochika, Sakakibara Risa, Sugino Tomoaki, Hirota Katsuya, Shimizu Hirohiko M., Kitaguchi Masaaki, Tanaka Genki, Otono Hidetoshi, Yoshioka Tamaki, Oide Hidetoshi, Ino Takashi, Taketani Kaoru, Shima Tatsushi, Seki Yoshichika

Meeting Abstracts of the Physical Society of Japan Vol. 69.1.1 ( 0 ) page： 87 2014

29pSD-7 Systematic uncertainty for event id and future prospects of analysis in neutron lifetime measurement at J-PARC/BL05

Yamada Takahito, Yokoyama Harumichi, Higashi Nao, Katayama Ryo, Sumino H., Mishima Kenji, Yamashita Satoru, Sakakibara Risa, Sugino Tomoaki, Hirota Katsuya, Shimizu Hirohiko M., Kitaguchi Masaaki, Tanaka Genki, Otono Hidetoshi, Yoshioka Tamaki, Oide Hidetoshi, Seki Yoshichika, Ino Takashi, Taketani Kaoru, Shima Tatsushi

Meeting Abstracts of the Physical Society of Japan Vol. 69.1.1 ( 0 ) page： 36 2014

29pSD-6 Estimation of stability of beam flux and its systematic uncertainty in neutron lifetime measurement at J-PARC/BL05

Sakakibara Risa, Sugino Tomoaki, Hirota Katsuya, Shimizu Hirohiko M., Kitaguchi Masaaki, Higashi Nao, Yokoyama Harumichi, Yamada Takahito, Katayama Ryo, Sumino Hirochika, Mishima Kenji, Yamashita Satoru, Tanaka Genki, Otono Hidetoshi, Yoshioka Tamaki, Oide Hideyuki, Seki Yoshichika, Ino Takashi, Taketani Kaoru, Shima Tatsushi

Meeting Abstracts of the Physical Society of Japan Vol. 69.1.1 ( 0 ) page： 36 2014

29pSD-5 Present status of neutron lifetime measurement at J-PARC/BL05

Kitaguchi Masaaki, Sakakibara Risa, Sugino Tomoaki, Hirota Katsuya, Shimizu Hirohiko M., Yokoyama Harumichi, Higashi Nao, Yamada Takahito, Sumino Hirochika, Mishima Kenji, Yamashita Satoru, Tanaka Genki, Otono Hidetoshi, Yoshioka Tamaki, Oide Hidetoshi, Seki Yoshichika, Ino Takashi, Taketani Kaoru, Shima Tatsushi

Meeting Abstracts of the Physical Society of Japan Vol. 69.1.1 ( 0 ) page： 36 2014

Concepts of Neutron Polarisation Analysis Devices for a New Neutron Chopper Spectrometer, POLANO, in J-PARC

Ohoyama K., Yokoo T., Itoh S., Ino T., Ohkawara M., Oku T., Tasaki S., Iwasa K., Sato T. J., Ishimoto S., Taketani K., Kira H., Sakaguch Y., Nanbu M., Hiraka H., Shimizu H. M., Takeda M., Hino M., Hayashi K., Fliges U., Hautle P.

1ST CONFERENCE ON LIGHT AND PARTICLE BEAMS IN MATERIALS SCIENCE 2013 (LPBMS2013) Vol. 502 ( 1 ) 2014

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

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 ( 1 ) 2014

Publisher：Journal of Physics: Conference Series

We developed a new neutron mirror made of Diamond-like carbon (DLC). DLC is a film of amorphous carbon that has characteristics of both diamond and graphite. We produced DLC mirrors by ionization deposition method which is one of the chemical vapor deposition (CVD). Generally, DLC made by CVD contents a few tens of percentages of hydrogen. It decreases the Fermi potential of the DLC coating because hydrogen has negative Fermi potential. In order to increase the Fermi potential of the coating, we deuterated the DLC by using deuterated benzene for the source gas. The characteristics of the deuterated DLC(DDLC) coating was evaluated by RBS, ERDA, x-ray reflectivity, AFM. As a result, DDLC coating has 243neV due to deuteration, which is the same level as Ni. The RMS of height of the DDLC was 0.6nm so that the DDLC coating can be applied for a focusing mirror or specular transportation of pulsed neutron. Besides, we also develop Hydrogen/Deuterium DLC multiple layer mirror. So far, 4 layers mirror has been succeeded. © Published under licence by IOP Publishing Ltd.

DOI： 10.1088/1742-6596/528/1/012010

Web of Science

Scopus

Rebunching ultracold neutrons by magnetic deceleration for the neutron edm experimental at J-parc Open Access

Imajo S., Iwashita Y., Geltenbort P., Arimoto Y., Shimizu H.M., Kitaguchi M., Yoshioka T., Seki Y.

IPAC 2013: Proceedings of the 4th International Particle Accelerator Conference page： 1187 - 1189 2013.12

Publisher：IPAC 2013: Proceedings of the 4th International Particle Accelerator Conference

Ultra cold neutrons (UCN), which have energies less than 300 neV, can be accelerated or decelerated by controlling static magnetic and RF fields. Neutron kinetic energies can inclease or declease when their spin flip. This method can be used to rebunch a pulsed beam of neutrons to a storage bottle that can store UCN with high density. High UCN densities can be achieved for precision measurements of neutron properties such as the Electric Dipole Moment. The results of a recent rst test experiments and present status of our development are reported.

Open Access

Scopus

Type-II entry of solar wind protons into the lunar wake: Effects of magnetic connection to the night-side surface

Nishino, MN; Fujimoto, M; Saito, Y; Tsunakawa, H; Kasahara, Y; Kawamura, M; Matsushima, M; Takahashi, F; Shibuya, H; Shimizu, H; Goto, Y; Hashimoto, K; Omura, Y; Kumamoto, A; Ono, T; Yokota, S

PLANETARY AND SPACE SCIENCE Vol. 87 page： 106 - 114 2013.10

Publisher：Planetary and Space Science

Our recent observations around the Moon revealed that so-called type-II (T2) entry of the solar wind protons into the near-Moon wake occurs when the IMF is dominated by the non-radial components (i.e. BY and/or B z). Under this condition a part of the solar wind protons scattered/reflected at the lunar dayside surface subsequently enters the central region of the near-Moon wake after a large-scale cycloid motion, which accelerates electrons along the filed line into the wake. The situation handled in the previous studies is that the relevant magnetic field line is detached from the lunar surface, leaving a possibility of the T2 entry under magnetic connection left open. Here we report that the protons can access the central wake region that is magnetically connected to the lunar nightsicle surface, which we categorize into the T2 entry with magnetic connection to the lunar surface (T2MC). Furthermore we show that the energy of the electron beams induced by the proton entry into the wake depends on the magnetic connectivity. Strong electron acceleration (up to several hundred eV to 1 keV) along the magnetic field associated with the T2 entry is prominent when the field line has its both ends in the solar wind, that is, when the magnetic field is detached from the lunar surface (i.e. the previously reported T2 entry that we rename toT2MD). On the other hand, no significant electron acceleration is found in the T2MC cases, although an enhancement of the electron flux associated with the T2 proton entry is evident. We also report that the T2 entry process takes place even under radial (Bx-dominated) IMF condition. Our results indicate that, while the T2 entry of solar wind protons into the wake itself does not require a special IMF condition but is a rather general phenomenon, the characteristic energy of associated electrons does show a strong dependence on the magnetic connectivity to the lunar surface. © 2013 Elsevier Ltd.

DOI： 10.1016/j.pss.2013.08.017

Web of Science

Scopus

An evaluation of the exposure in nadir observation of the JEM-EUSO mission Open Access

Adams, JH; Ahmad, S; Albert, JN; Allard, D; Ambrosio, M; Anchordoqui, L; Anzalone, A; Arai, Y; Aramo, C; Asano, K; Ave, M; Barrillon, P; Batsch, T; Bayer, J; Belenguer, T; Bellotti, R; Berlind, AA; Bertaina, M; Biermann, PL; Biktemerova, S; Blaksley, C; Biccki, J; Blin-Bondil, S; Blümer, J; Bobik, P; Bogomilov, M; Bonamente, M; Briggs, MS; Briz, S; Bruno, A; Cafagna, F; Campana, D; Capdevielle, JN; Caruso, R; Casolino, M; Cassardo, C; Castellini, G; Catalano, O; Cellino, A; Chikawa, M; Christi, MJ; Connaughton, V; Cortés, JF; Crawford, HJ; Cremonini, R; Csorna, S; D'Olivo, JC; Dagoret-Campagne, S; de Castro, AJ; De Donato, C; de la Taille, C; del Peral, L; Dell'Oro, A; De Pascale, MP; Di Martino, M; Distratis, G; Dupieux, M; Ebersoldt, A; Ebisuzaki, T; Engel, R; Falk, S; Fang, K; Fenu, F; Fernández-Gómez, I; Ferrarese, S; Franceschi, A; Fujimoto, J; Galeotti, P; Garipov, G; Geary, J; Giaccari, UG; Giraudo, G; Gonchar, M; Alvarado, CG; Gorodetzky, P; Guarino, F; Guzmán, A; Hachisu, Y; Harlov, B; Haungs, A; Carretero, JH; Higashide, K; Iguchi, T; Ikeda, H; Inoue, N; Inoue, S; Insolia, A; Isgrò, F; Itow, Y; Joven, E; Judd, EG; Jung, A; Kajino, F; Kajino, T; Kaneko, I; Karadzhov, Y; Karczmarczyk, J; Katahira, K; Kawai, K; Kawasaki, Y; Keilhauer, B; Khrenov, BA; Kim, JS; Kim, SW; Kim, SW; Kleifges, M; Klimov, PA; Ko, SH; Kolev, D; Kreykenbohm, I; Kudela, K; Kurihara, Y; Kuznetsov, E; La Rosa, G; Lee, J; Licandro, J; Lim, H; López, F; Maccarone, MC; Mannheim, K; Marcelli, L; Marini, A; Martin-Chassard, G; Martinez, O; Masciantonio, G; Mase, K; Matev, R; Maurissen, A; Medina-Tanco, G; Mernik, T; Miyamoto, H; Miyazaki, Y; Mizumoto, Y; Modestino, G; Monnier-Ragaigne, D; de los Rios, JAM; Mot, B; Murakami, T; Nagano, M; Nagata, M; Nagataki, S; Nakamura, T; Nam, JW; Nam, S; Nam, K; Napolitano, T; Naumov, D; Neronov, A; Nomoto, K; Ogawa, T; Ohmori, H; Olinto, AV; Orleanski, P; Osteria, G; Pacheco, N; Panasyuk, MI; Parizot, E; Park, IH; Pastircak, B; Patzak, T; Paul, T; Pennypacker, C; Peter, T; Picozza, P; Pollini, A; Prieto, H; Reardon, P; Reinabi, M; Reyes, M; Ricci, M; Rodriguez, I; Frias, MDR; Ronga, F; Rothkaehl, H; Roudil, G; Rusinov, I; Rybczynski, M; Sabau, MD; Cano, GS; Saito, A; Sakaki, N; Sakata, M; Salazar, H; Sanchez, S; Santangelo, A; Cruz, LS; Palomino, MS; Saprykin, O; Sarazin, F; Sato, H; Sato, M; Schanz, T; Schieler, H; Scotti, V; Scuderi, M; Segreto, A; Selmane, S; Semikoz, D; Serra, M; Sharakin, S; Shibata, T; Shimizu, HM; Shinozaki, K; Shirahama, T; Siemieniec-Ozigbio, G; López, HHS; Sledd, J; Slomiriska, K; Sobey, A; Sugiyama, T; Supanitsky, D; Suzuki, M; Szabelska, B; Szabelski, J; Tajima, F; Tajima, N; Tajima, T; Takahashi, Y; Takami, H; Takeda, M; Takizawa, Y; Tenzer, C; Tibolla, O; Tkachev, L; Tomida, T; Tone, N; Trillaud, F; Tsenov, R; Tsuno, K; Tymieniecka, T; Uchihori, Y; Vaduvescu, O; Valdés-Galicia, JF; Vallania, P; Valore, L; Vankova, G; Vigorito, C; Villaseñor, L; von Ballmoos, P; Wada, S; Watanabe, J; Watanabe, S; Watts, J ; Weber, M; Weiler, TJ; Wibig, T; Wiencke, L; Wille, M; Wilms, J; Wlodarczyk, Z; Yamamoto, T; Yamamoto, Y; Yang, J; Yano, H; Yashin, IV; Yonetoku, D; Yoshida, K; Yoshida, S; Young, R; Zamora, A; Marchi, AZ

ASTROPARTICLE PHYSICS Vol. 44 page： 76 - 90 2013.4

Publisher：Astroparticle Physics

We evaluate the exposure during nadir observations with JEM-EUSO, the Extreme Universe Space Observatory, on-board the Japanese Experiment Module of the International Space Station. Designed as a mission to explore the extreme energy Universe from space, JEM-EUSO will monitor the Earth's nighttime atmosphere to record the ultraviolet light from tracks generated by extensive air showers initiated by ultra-high energy cosmic rays. In the present work, we discuss the particularities of space-based observation and we compute the annual exposure in nadir observation. The results are based on studies of the expected trigger aperture and observational duty cycle, as well as, on the investigations of the effects of clouds and different types of background light. We show that the annual exposure is about one order of magnitude higher than those of the presently operating ground-based observatories. © 2013 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.astropartphys.2013.01.008

Web of Science

Scopus

Basic Concepts of Polarisation Analysis for Neutron Chopper Spectrometer POLANO at J-PARC

Ohoyama, K; Yokoo, T; Itoh, S; Suzuki, J; Iwasa, K; Sato, TJ; Kira, H; Sakaguchi, Y; Ino, T; Oku, T; Tomiyasu, K; Matsuura, M; Hiraka, H; Fujita, M; Kimura, H; Sato, T; Suzuki, J; Shimizu, HM; Arima, T; Takeda, M; Kaneko, K; Hino, M; Muto, S; Nojiri, H; Lee, CH; Park, JG; Choi, S

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN Vol. 82 2013.1

Magnetic Neutron Optics and Its Applications

SHIMIZU Hirohiko

Journal of the Japan Society for Precision Engineering Vol. 79 ( 9 ) page： 809 - 812 2013

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Papers - SHIMIZU Hirohiko