研究者詳細 - 清水　裕彦

論文 - 清水　裕彦

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A small angle neutron scattering (SANS) experiment using very cold neutrons (VCN)

Bleuel, M; Carpenter, JM; Micklich, BJ; Geltenbort, P; Mishima, K; Shimizu, HM; Iwashita, Y; Hirota, K; Hino, M; Kennedy, SJ; Lal, J

PHYSICA B-CONDENSED MATTER 404 巻 ( 17 ) 頁： 2629 - 2632 2009年9月

出版者・発行元：Physica B Condensed Matter

This paper describes the results of SANS measurements of small samples using the very cold neutron (VCN) beam of the PF2 instrument at the Institut Laue Langevin (ILL), France. In addition to a classical SANS pinhole collimation, the experiment used a polarizing supermirror as a monochromator and a magnetic sextupole lens to focus the neutron beam in order to gain intensity and avoid any material in the neutron beam besides the sample.

DOI： 10.1016/j.physb.2009.06.048

Web of Science

Scopus

Simulation study of a pulsed neutron focusing using a pulsed electromagnetic lens coupled with a permanent magnet

Iwashita H., Iwasa H., Hiraga F., Kamiyama T., Kiyanagi Y., Suzuki J., Shinohara T., Oku T., Shimizu H.M.

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 600 巻 ( 1 ) 頁： 129 - 131 2009年2月

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

A pulsed sextupole electromagnetic lens with suitably controlled time-dependent magnetic field can in principle focus pulsed neutrons at the same focal point over a wide range of wavelength as the lens removes aberrations. However, in fact, it is difficult to focus neutrons over a wide range of wavelength because attenuation of a practical pulsed sextupole electromagnet is faster than an ideal case. We have devised a method of canceling the difference between the practical pulsed sextupole magnetic field and the ideal magnetic field with the use of a permanent sextupole magnet. We performed simulation calculations to investigate the feasibility of this method, and it was shown that focusing wavelength range spread compared with the case using a pulsed magnetic lens only. This result indicates the usefulness of the method. © 2008.

DOI： 10.1016/j.nima.2008.11.105

Scopus

13aSA-1 重力場による超冷中性子の量子状態観測 : ILL/PF2における実験結果I(中性子,カシミール力,ポジトロニウム,素粒子論領域) Open Access

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

日本物理学会講演概要集 64.2.1 巻 ( 0 ) 頁： 27 2009年

13aSA-2 重力場による超冷中性子の量子状態観測 : ILL/PF2における実験結果II(中性子,カシミール力,ポジトロニウム,素粒子論領域) Open Access

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

日本物理学会講演概要集 64.2.1 巻 ( 0 ) 頁： 27 2009年

27aSB-8 J-PARC BL05ビームライン用スピンフリップチョッパー(ビームライン,27aSB 素粒子実験領域,ビーム物理領域合同,素粒子実験領域) Open Access

北口雅暁, 日野正裕, 三島賢二, 竹谷薫, 吉岡瑞樹, 武藤豪, 猪野隆, 清水裕彦, 嶋達志, 酒井健二, 關義親, 舟橋春彦, 佐藤広海, 広田克也, 大竹淑恵, 音野瑛俊, 山下了, 鈴木善明, 佐貫智行

日本物理学会講演概要集 64.1.1 巻 ( 0 ) 頁： 25 2009年

30aRE-12 J-PARC BL05中性子光学・基礎物理実験装置の現状(30aRE X線・粒子線(中性子),領域10(誘電体,格子欠陥,X線・粒子線,フォノン物性)) Open Access

酒井健二, 武藤豪, 猪野隆, 吉岡瑞樹, 三島賢二, 竹谷薫, 清水裕彦

日本物理学会講演概要集 64.1.4 巻 ( 0 ) 頁： 975 2009年

27pYK-8 偏極^3He中性子スピンフィルターの開発その1(X線・粒子線(中性子),領域10,誘電体,格子欠陥,X線・粒子線,フォノン物性) Open Access

有本靖, 猪野隆, 清水裕彦, 神山崇, 吉良弘, 坂口佳史, 奥隆之, 鈴木淳市, 中村充孝, 新井正敏, 遠藤康夫, 加倉井和久, 大山研司, 平賀晴弘, 山田和芳

日本物理学会講演概要集 64.2.4 巻 ( 0 ) 頁： 882 2009年

27pYK-2 J-PARC中性子光学・基礎物理ビームラインの現状報告(X線・粒子線(中性子),領域10,誘電体,格子欠陥,X線・粒子線,フォノン物性) Open Access

猪野隆, 三島賢二, 竹谷薫, 吉岡瑞樹, 有本靖, 武藤豪, 清水裕彦, 音野瑛俊, 生出秀行, 久保田隆至, 山下了, 鈴木善明, 佐貫智行, 酒井健二, 鈴木淳市, 奥隆之, 篠原武尚, 北口雅暁, 日野正裕, 山田雅子, 岩下芳久, 嶋達志, 關義親, 舟橋春彦, 広田克也, 大竹淑恵

日本物理学会講演概要集 64.2.4 巻 ( 0 ) 頁： 881 2009年

27pYK-10 偏極^3He中性子スピンフィルターの開発その3(X線・粒子線(中性子),領域10,誘電体,格子欠陥,X線・粒子線,フォノン物性) Open Access

坂口佳史, 吉良弘, 奥隆之, 鈴木淳市, 中村充孝, 新井正敏, 遠藤康夫, 加倉井和久, 武田全康, 脇本秀一, 山崎大, 小泉智, 有本靖, 猪野隆, 清水裕彦, 神山崇, 大山研司, 平賀晴弘, 山田和芳

日本物理学会講演概要集 64.2.4 巻 ( 0 ) 頁： 882 2009年

27aSG-6 J-PARC BL05における中性子散乱断面積精密測定による未知相互作用探索計画(27aSG 中性子の物理,ニュートリノ検出器,素粒子実験領域) Open Access

嶋達志, 清水裕彦, 猪野隆, 三島賢二, 竹谷薫, 吉岡瑞樹, 武藤豪, 舟橋春彦, 北口雅暁, 日野正裕, 關義親, 広田克也, 大竹淑恵, 酒井健二, 鈴木淳市, 奥隆之, 篠原武尚, 音野瑛俊, 山下了, 鈴木善明, 佐貫智行

日本物理学会講演概要集 64.1.1 巻 ( 0 ) 頁： 25 2009年

27aSG-3 可変六極磁石による極冷中性子集束実験(27aSG 中性子の物理,ニュートリノ検出器,素粒子実験領域) Open Access

山田雅子, 岩下芳久, 市川雅浩, 杉本貴則, 頓宮拓, 藤澤博, 清水裕彦, 猪野隆, 三島賢二, 竹谷薫, 吉岡瑞樹, 武藤豪, 奥隆之, 鈴木淳市, 広田克也, 關義親, 川崎真介, 神谷好郎, 音野瑛俊

日本物理学会講演概要集 64.1.1 巻 ( 0 ) 頁： 25 2009年

27aSE-14 重力に束縛された超冷中性子の量子状態観測実験 : ILLでの実験に向けて(27aSE CP対称性の破れ,Bの物理,Kの物理,ポジトロニウム,素粒子実験領域) Open Access

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

日本物理学会講演概要集 64.1.1 巻 ( 0 ) 頁： 25 2009年

J-PARC UCN Taskforce

清水裕彦, 山下了

Summary of the J-PARC UCN Taskforce E-Print ArXiv0907.0515 2009年

Fundamental science for neutrons

Shimizu H.

International Journal of Phytoremediation 19 巻 ( 4 ) 頁： 43 - 44 2009年

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

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

33rd International Conference on Infrared and Millimeter Waves and the 16th International Conference on Terahertz Electronics 2008 Irmmw Thz 2008 2008年12月

出版者・発行元：33rd International Conference on Infrared and Millimeter Waves and the 16th International Conference on Terahertz Electronics 2008 Irmmw Thz 2008

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

DOI： 10.1109/ICIMW.2008.4665736

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

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