研究者詳細 - 清水　裕彦

論文 - 清水　裕彦

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Terahertz imaging with a two-dimensional array detector based on superconducting tunnel junctions

Ariyoshi S., Otani C., Dobroiu A., Sato H., Taino T., Matsuo H., Shimizu H.M.

33rd International Conference on Infrared and Millimeter Waves and the 16th International Conference on Terahertz Electronics, 2008, IRMMW-THz 2008 2008年12月

出版者・発行元：33rd International Conference on Infrared and Millimeter Waves and the 16th International Conference on Terahertz Electronics, 2008, IRMMW-THz 2008

We demonstrated terahertz imaging using a two-dimensional array detector with 5x5 elements based on superconducting tunnel junctions. Real-time 25-pixel imaging at 0.65 THz was successfully performed. The array detector also allowed the shortening of the total acquisition time for larger images, made up of pixel blocks. ©IEEE.

DOI： 10.1109/ICIMW.2008.4665736

Scopus

2D elemental analysis approach in focused neutron beam induced prompt gamma-ray analysis at JAEA

Segawa M., Matsue H., Sekiya Y., Yamada S., Shinohara T., Oku T., Sasao H., Suzuki J., Shimizu H.M.

Journal of Radioanalytical and Nuclear Chemistry 278 巻 ( 3 ) 頁： 647 - 651 2008年12月

出版者・発行元：Journal of Radioanalytical and Nuclear Chemistry

We have constructed a new system which could analyze a position distribution of several elements in a sample with 2 dimensional prompt γ-ray analysis (2D PGA) system using focused neutron beam at JAEA. We aimed that the system could analyze local information in a sample with a good signal γ-ray from interested elements to noise of background γ-ray ratio. As a result, this system could determine the position resolution and spatial resolution within 1 mm. © 2008 Springer Science+Business Media, LLC.

DOI： 10.1007/s10967-008-1402-3

Scopus

Strong variable permanent multipole magnets

Iwashita, Y; Ichikawa, M; Tajima, Y; Nakamura, S; Kumada, M; Spencer, CM; Tauchi, T; Kuroda, S; Okugi, T; Ino, T; Muto, S; Shimizu, HM

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 18 巻 ( 2 ) 頁： 957 - 960 2008年6月

出版者・発行元：IEEE Transactions on Applied Superconductivity

Three super strong permanent multipole magnets have been made: a fixed strength quadrupole, a variable quadrupole and a variable sextupole. The inner and outer diameters of the first 100 mm-length quadrupole are 14 mm and 100 mm, respectively. This fixed strength quad has an integrated gradient of 28.5 T; where the gradient at the center is more than 2.9 T/cm. The second, variable, quadrupole has an integrated strength of 38 T with 15 mm inner diameter and 230 mm length at the maximum: there are sixteen positions in its variable strength with about a 2 T even step width. The sextupole model is intended to change its strength at 25 Hz. One application of a variable quadrupole magnet is a final doublet quadrupole for an e+e- linear collider. Permanent magnet sextupoles are useful for focusing of cold neutrons, which are a very useful probe for material research. Strong octupoles for beam tail folding in the final focus beamline of a linear collider will also be possible with permanent magnets. These high order multipoles made from permanent magnets can achieve higher strengths, for a given bore radius, than superconducting ones. Design works are presented starting from brief review. © 2008 IEEE.

DOI： 10.1109/TASC.2008.921302

Web of Science

Scopus

超伝導トンネル接合素子を用いたテラヘルツ波検出器アレイの開発とイメージング応用

有吉誠一郎, 大谷知行, ドブロユアドリアン, 佐藤広海, 田井野徹, 松尾宏, 清水裕彦

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 78 巻頁： 62 2008年5月

Application of a neutron-polarizing device based on a quadrupole magnet to a focusing SANS instrument with a magnetic neutron lens

Oku, T; Shinohara, T; Kikuchi, T; Oba, Y; Iwase, H; Koizumi, S; Suzuki, J; Shimizu, HM

MEASUREMENT SCIENCE AND TECHNOLOGY 19 巻 ( 3 ) 2008年3月

出版者・発行元：Measurement Science and Technology

A magnetic neutron lens based on a sextupole magnet is considered an ideal neutron-focusing device for focusing-geometry small-angle neutron scattering (FSANS) instruments using polarized neutrons. However, the magnetic neutron lens functions both as focusing and defocusing lens for positive and negative polarity neutrons, respectively. Negative polarity neutrons are defocused by the lens and spread over the detector of the instrument, resulting in an increase of the background level. Therefore, a neutron-polarizing device with a very high polarizing efficiency P ≳ 0.99 is required to be employed together with the magnetic neutron lens. A neutron-polarizing device based on a quadrupole magnet has a very high polarizing efficiency P ≳ 0.99, which is sufficient for the application to the FSANS instrument. In this study, we installed the quadrupole magnet in the FSANS instrument SANS-J-II and investigated its performance with respect to the conventional magnetic super-mirror polarizers of the FSANS instrument. © 2008 IOP Publishing Ltd.

DOI： 10.1088/0957-0233/19/3/034011

Web of Science

Scopus

Variable permanent magnet sextupole lens for focusing of pulsed cold neutrons

Iwashita, Y; Tajima, Y; Ichikawa, M; Nakamura, S; Ino, T; Muto, S; Shimizu, HM

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 586 巻 ( 1 ) 頁： 73 - 76 2008年2月

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

A Variable Permanent Magnet Sextupole (VPMS) lens that can focus pulsed slow neutrons is under development. It is based on the extended Halbach configuration to generate stronger magnetic field. In order to adjust the strength, the magnet is divided into two nested rings, where the inner ring is fixed and the outer ring can be rotated. This device will focus cold neutrons with wavelength of a few to several Angstroms at about 10 m focal length. We fabricated a half-scale model to measure the strength and the torque as functions of the rotor angle. Because the torque is measured as high as more than 30 N m, a mechanism to rotate the rotor is carefully designed. After installation of such a mechanism, a motor will drive the rotor and the temperature rise caused from eddy current loss will be measured. Detailed development of the system will be presented. © 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2007.11.058

Web of Science

Scopus

The JEM-EUSO project: Observing extremely high energy cosmic rays and neutrinos from the international space station

Ebisuzaki, T; Uehara, Y; Ohmori, H; Kawai, K; Kawasaki, Y; Sato, M; Takizawa, Y; Bertaina, ME; Kajino, F; Sawabe, T; Inoue, K; Sasaki, A; Sakata, M; Yamamoto, Y; Nagano, M; Inoue, N; Shibata, T; Sakaki, N; Uchihori, Y; Takahashi, Y; Shimizu, H; Arai, Y; Kurihara, Y; Fujimoto, H; Yoshida, S; Mizumoto, Y; Inoue, S; Asano, K; Sugiyama, T; Watanabe, J; Ikeda, H; Suzuki, M; Imamura, T; Yano, H; Murakami, T; Yonetoku, D; Itow, Y; Taguchi, M; Nagata, M; Nagataki, S; Abe, S; Tajima, T; Adams, JH; Mitchell, S; Christl, MJ; Watts, J; English, A; Takahashi, Y; Pitalo, K; Hadaway, J; Geary, J; Readon, P; Crawford, H; Pennypacker, C; Arisaka, K; Cline, D; Gorodetsky, P; Salin, P; Patzark, T; Maurissen, A; Valentin, M

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS 175 巻 ( SUPPL.: COMPLETE ) 頁： 237 - 240 2008年1月

微細孔形成技術を利用した中性子検出用MSGCの開発

藤田薫, 高橋浩之, 猪野隆, 清水裕彦, 岸本俊二, 古坂道弘, 奥隆之, 鈴木淳市

日本原子力学会　年会・大会予稿集 2008f 巻 ( 0 ) 頁： 131 - 131 2008年

記述言語：日本語出版者・発行元：一般社団法人日本原子力学会

新たな配線技術を利用した中性子検出に向けたマイクロストリップガス比例計数管(MSGC)の開発を行った。1mmのアノードピッチと同等の間隔で基板を貫通する微細孔を形成し、その孔を通して信号を取り出せるMSGCの製作を行い動作を確認した。

DOI： 10.11561/aesj.2008f.0.131.0

CiNii Research

Terahertz Imaging with a Two-dimensional Array Detector Based on Superconducting Tunnel Junctions

Ariyoshi, S; Otani, C; Dobroiu, A; Sato, H; Taino, T; Matsuo, H; Shimizu, HM

2008 33RD INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES, VOLS 1 AND 2 頁： 618 - 618 2008年

中性子光学・基礎物理ビームライン (J-PARC BL05)

清水裕彦

波紋 18 巻 ( 3 ) 頁： 151 - 154 2008年

出版者・発行元：日本中性子科学会

A pulsed cold neutron beam for the study of neutron optics and fundamental physics (NOP) is under construction as the BL05 of the spallation neutron source of the J-PARC. The NOP beamline has three beam branches, which provide the highly-polarized beam, high intensity beam and low divergence beam for the neutron decay experiment, the neutron scattering experiment and the neutron interferometry experiment, respectively. We overview the physics to be studied at the NOP beamline at its beginning stage.

DOI： 10.5611/hamon.18.151

CiNii Research

23aSJ-10 重力場による超冷中性子の量子状態観測 : 冷中性子を用いた測定器の性能評価(23aSJ 半導体検出器,素粒子実験領域)

市川豪, 川崎真介, 駒宮幸男, 神谷好郎, 佐貫智行, 清水裕彦, 日野正裕, 北口雅暁

日本物理学会講演概要集 63.2.1 巻 ( 0 ) 頁： 22 2008年

26pZL-2 冷中性子集束用の強度変調型永久六極磁石の開発(ビーム診断,ビーム制御,ビーム物理領域)

山田雅子, 市川雅浩, 岩下芳久, 田島裕二郎, 頓宮拓, 猪野隆, 清水裕彦, 武藤豪

日本物理学会講演概要集 63.1.1 巻 ( 0 ) 頁： 131 2008年

24pWG-11 多重連結六極磁石による白色中性子の集光と応用(X線・粒子線(中性子),領域10,誘電体,格子欠陥,X線・粒子線,フォノン物性)

鈴木淳市, 奥隆之, 篠原武尚, 大場洋次郎, 菊地隆之, 清水裕彦

日本物理学会講演概要集 63.1.4 巻 ( 0 ) 頁： 931 2008年

24pWG-10 熱中性子による即発γ線を用いた2-3次元元素分布測定システムの開発(X線・粒子線(中性子),領域10,誘電体,格子欠陥,X線・粒子線,フォノン物性)

瀬川麻里子, 松江秀明, 山田悟, 篠原武尚, 奥隆之, 笹尾一, 鈴木淳市, 清水裕彦

日本物理学会講演概要集 63.1.4 巻 ( 0 ) 頁： 931 2008年

23pSM-6 パルス冷中性子集束用の強度変調型永久六極磁石の開発II(23pSM 中性子実験,素粒子実験領域)

山田雅子, 岩下芳久, 市川雅浩, 杉本貴則, 頓宮拓, 藤澤博, 清水裕彦, 猪野隆, 三島賢二, 竹谷薫, 吉岡瑞樹, 武藤豪, 森嶋隆裕, 奥隆之, 鈴木淳市, 篠原武尚, 酒井健二, 佐藤広海, 広田克也, 大竹淑惠, 關義親, 川崎真介, 駒宮幸男, 神谷好郎, 音野瑛俊, 山下了

日本物理学会講演概要集 63.2.1 巻 ( 0 ) 頁： 24 2008年

23pSM-5 極冷中性子干渉計の開発(23pSM 中性子実験,素粒子実験領域)

關義親, 北口雅暁, 日野正裕, 舟橋春彦, 三島賢二, 猪野隆, 竹谷薫, 吉岡瑞樹, 武藤豪, 森嶋隆裕, 清水裕彦, 佐貫智行, 鈴木善明, 嶋達志, 佐藤宏海, 広田克也, 大竹淑恵, 川崎真介, 駒宮幸男, 神谷好郎, 音野瑛俊, 山下了

日本物理学会講演概要集 63.2.1 巻 ( 0 ) 頁： 24 2008年

23pSM-2 J-PARCパルス中性子を用いた中性子干渉実験(23pSM 中性子実験,素粒子実験領域)

北口雅暁, 日野正裕, 關義親, 舟橋春彦, 三島賢二, 猪野隆, 竹谷薫, 吉岡瑞樹, 武藤豪, 森嶋隆裕, 清水裕彦, 嶋達志, 佐藤広海, 広田克也, 大竹淑恵, 酒井健二

日本物理学会講演概要集 63.2.1 巻 ( 0 ) 頁： 23 2008年

23aSJ-9 重力場による超冷中性子の量子状態観測 : ILLでの超冷中性子照射試験について(23aSJ 半導体検出器,素粒子実験領域)

川崎真介, 市川豪, 駒宮幸男, 神谷好郎, 佐貫智行, 清水裕彦, 日野正裕, 北口雅暁

日本物理学会講演概要集 63.2.1 巻 ( 0 ) 頁： 22 2008年

Ｊ‐ＰＡＲＣで迎える結晶学の新展開　　１．Ｊ‐ＰＡＲＣで展開される中性子科学　　中性子基盤研究開発

曽山和彦, 清水裕彦, 大友季哉

日本結晶学会誌 50 巻 ( 1 ) 頁： 66 - 71 2008年

Development of permanent mangnet sextupole lens for focusing of cold neutrons

Yamada M., Iwashita Y., Ichikawa M., Tongu H., Shimizu H., Ino T., Muto S.

EPAC 2008 - Contributions to the Proceedings 頁： 2392 - 2394 2008年

出版者・発行元：EPAC 2008 - Contributions to the Proceedings

A modulating permanent magnet sextupole lens that can focus pulsed cold neutrons is under development. The magnet is based on the extended Halbach configuration to generate stronger magnetic field. In order to adjust the strength, the magnet is divided into two co-axial nested rings, where the inner ring is fixed and the outer ring can be rotated. Synchronizing the period of the modulation with that of pulsed neutron beam suppress the chromatic aberration. We have fabricated a half scale model as a prototype and studied the strength, the temperature rise caused by eddy current. We have reduced the temperature rise about half of the former model by making the poles laminated structure. We are considering further improvement of the temperature rise and the system of rotating the outer ring with energy loss minimum. We are also measuring the very-cold neutrons focused by the half scale model.

Scopus

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