研究者詳細 - 清水　裕彦

論文 - 清水　裕彦

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21aDL-3 J-PARC/BL05における中性子寿命測定実験の系統誤差の評価

北原龍之介, 岩下芳久, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 山田崇人, 片山領, 東直, 横山晴道, 角野浩史, 山下了, 田中元気, 角直幸, 音野瑛俊, 吉岡瑞樹, 生出秀行, 関義親, 三島賢二, 竹谷薫, 猪野隆, 嶋達志

日本物理学会講演概要集 70.1 巻 ( 0 ) 頁： 63 2015年

21aDL-2 J-PARC/BL05における中性子寿命測定実験 : 2014年データ解析

角直幸, 田中元気, 音野瑛俊, 吉岡瑞樹, 北原龍之介, 岩下芳久, 山田崇人, 片山領, 東直, 横山晴道, 角野浩史, 山下了, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 生出秀行, 関義親, 嶋達志, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 70.1 巻 ( 0 ) 頁： 62 2015年

21aDL-1 J-PARC/BL05における中性子寿命測定実験の現状

田中元気, 角直幸, 吉岡瑞樹, 音野瑛俊, 北原龍之介, 岩下芳久, 山田崇人, 片山領, 東直, 横山晴道, 角野浩史, 山下了, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 生出秀行, 関義親, 嶋達志, 三島賢二, 竹谷薫, 猪野隆

日本物理学会講演概要集 70.1 巻 ( 0 ) 頁： 61 2015年

21aCE-12 CP非保存研究のための複合核における部分波混合核の測定

広田克也, 北口雅暁, 清水裕彦, 市川豪, 杉野智昭, 酒井健二, 木村敦, 原田秀郎, 猪野隆

日本物理学会講演概要集 70.1 巻 ( 0 ) 頁： 255 2015年

Development of accelerator-driven compact neutron sources Open Access

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

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

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

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

IPAC 2014: Proceedings of the 5th International Particle Accelerator Conference 頁： 751 - 753 2014年7月

出版者・発行元：IPAC 2014: Proceedings of the 5th International Particle Accelerator Conference

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

DOI： 10.18429/JACoW-IPAC2014-MOPRI065

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) 528 巻 ( 1 ) 2014年

出版者・発行元：Journal of Physics: Conference Series

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

DOI： 10.1088/1742-6596/528/1/012030

Web of Science

Scopus

18aSJ-1 J-PARC/BL05中性子寿命測定実験 : 中性子フラックスの決定(18aSJ 中性子・ニュートリノ,素粒子実験領域)

三島賢二, 山下了, 山田崇人, 片山領, 東直, 横山晴道, 角野浩史, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 田中元気, 角直幸, 音野瑛俊, 吉岡瑞樹, 北原龍之介, 岩下芳久, 生出秀行, 嶋達志, 関義親, 猪野隆, 竹谷薫

日本物理学会講演概要集 69.2.1 巻 ( 0 ) 頁： 18 2014年

18aSJ-2 J-PARC/BL05中性子寿命実験 : TPC検出器の改良及び評価(18aSJ 中性子・ニュートリノ,素粒子実験領域)

北原龍之介, 岩下芳久, 山田崇人, 片山領, 東直, 横山晴道, 角野浩史, 三島賢二, 山下了, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 田中元気, 角直幸, 音野瑛俊, 吉岡瑞樹, 生出秀行, 関義親, 嶋達志, 竹谷薫, 猪野隆

日本物理学会講演概要集 69.2.1 巻 ( 0 ) 頁： 18 2014年

28aTR-7 J-PARC/BL05中性子寿命測定実験 : 現状と展望(28aTR 実験核物理領域,ビーム物理領域,素粒子実験領域合同,J-PARCと原子核素粒子実験(合同),実験核物理領域)

三島賢二, 山下了, 山田崇人, 片山領, 東直, 横山晴道, 角野浩史, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 田中元気, 音野瑛俊, 吉岡瑞樹, 生出秀行, 猪野隆, 竹谷薫, 嶋達志, 関義親

日本物理学会講演概要集 69.1.1 巻 ( 0 ) 頁： 87 2014年

29pSD-7 J-PARC/BL05中性子寿命測定実験におけるイベント同定に伴う系統誤差の理解と今後の展望(29pSD ニュートリノ振動,中性子,素粒子実験領域)

山田崇人, 横山晴道, 東直, 片山領, 角野浩史, 三島賢二, 山下了, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 田中元気, 音野瑛俊, 吉岡瑞樹, 生出秀行, 関義親, 猪野隆, 竹谷薫, 嶋達志

日本物理学会講演概要集 69.1.1 巻 ( 0 ) 頁： 36 2014年

29pSD-6 J-PARC/BL05中性子寿命測定実験の入射フラックス測定の安定性とその系統誤差の評価(29pSD ニュートリノ振動,中性子,素粒子実験領域)

榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 北口雅暁, 東直, 横山晴道, 山田崇人, 片山領, 角野浩史, 三島賢二, 山下了, 田中元気, 音野瑛俊, 吉岡瑞樹, 生出秀行, 関義親, 猪野隆, 竹谷薫, 嶋達志

日本物理学会講演概要集 69.1.1 巻 ( 0 ) 頁： 36 2014年

29pSD-5 J-PARC/BL05中性子寿命測定実験の現状(29pSD ニュートリノ振動,中性子,素粒子実験領域)

北口雅暁, 榊原理紗, 杉野智昭, 広田克也, 清水裕彦, 横山晴道, 東直, 山田崇人, 片山領, 角野浩史, 三島賢二, 山下了, 田中元気, 音野瑛俊, 吉岡瑞樹, 生出秀行, 関義親, 猪野隆, 竹谷薫, 嶋達志

日本物理学会講演概要集 69.1.1 巻 ( 0 ) 頁： 36 2014年

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

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

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

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

Sakurai Dai, Chiba Junsei, Ino Takashi, Kakusho Nobunori, Kaneko Naokatsu, Katayama Ryo, Kitaguchi Masaaki, Mishima Kenji, Muto Suguru, Ozeki Kazuhide, Seki Yoshichika, Shimizu Hirohiko M., Yamashita Satoru, Yoshioka Tamaki, Nishimura Daiki

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

出版者・発行元：Journal of Physics: Conference Series

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

DOI： 10.1088/1742-6596/528/1/012010

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 頁： 1187 - 1189 2013年12月

出版者・発行元：IPAC 2013: Proceedings of the 4th International Particle Accelerator Conference

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

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 87 巻頁： 106 - 114 2013年10月

出版者・発行元：Planetary and Space Science

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

DOI： 10.1016/j.pss.2013.08.017

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 44 巻頁： 76 - 90 2013年4月

出版者・発行元：Astroparticle Physics

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

DOI： 10.1016/j.astropartphys.2013.01.008

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 82 巻 2013年1月

磁気レンズを用いた中性子線の制御技術とその応用

清水裕彦

精密工学会誌 79 巻 ( 9 ) 頁： 809 - 812 2013年

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