研究者詳細 - 清水　裕彦

論文 - 清水　裕彦

分割表示 590 件中 381 - 400 件目／全件表示 >>

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

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

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 634 巻頁： S134 - S137 2011年4月

16aSD-5 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(16aSD ニュートリノ・Bの物理・中性子EDM,素粒子実験領域) Open Access

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-郎, 吉見彰洋, 嶋達志

日本物理学会講演概要集 66.2.1 巻 ( 0 ) 頁： 14 2011年

25aTN-6 J-PARC偏極度解析中性子分光器計画の現状(25aTN 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)) Open Access

大山研司, 岩佐和晃, 伊藤晋一, 横尾哲也, 平賀晴弘, 藤田全基, 松浦直人, 佐藤豊人, 堀金和正, 佐藤卓, 富安啓輔, 有馬孝尚, 猪野隆, 吉良弘, 坂口佳史, 奥隆之, 有本靖, 鈴木淳市, 清水裕彦, 武田全康, 金子耕士, 日野正裕, 武藤豪, 野尻浩之

日本物理学会講演概要集 66.1.4 巻 ( 0 ) 頁： 952 2011年

22pJA-2 J-PARC偏極度解析中性子分光器計画の進展(22pJA 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)) Open Access

大山研司, 岩佐和晃, 横尾哲也, 伊藤晋一, 平賀晴弘, 藤田全基, 松浦直人, 木村宏之, 富安啓輔, 佐藤豊人, 佐藤卓, 有馬孝尚, 猪野隆, 吉良弘, 坂口佳史, 奥隆之, 有本靖, 鈴木淳市, 清水裕彦, 武田全康, 金子耕士, 日野正裕, 武藤豪, 野尻浩之

日本物理学会講演概要集 66.2.4 巻 ( 0 ) 頁： 995 2011年

22aJA-6 偏極^3He中性子スピンフィルターのガラスセルの開発IV(22aJA 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)) Open Access

坂口佳史, 吉良弘, 奥隆之, 篠原武尚, 鈴木淳市, 酒井健二, 中村充孝, 鈴谷賢太郎, 相澤一也, 新井正敏, 武田全康, 遠藤康夫, 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, 張烈錚, 尾原幸治, 加倉井和久

日本物理学会講演概要集 66.2.4 巻 ( 0 ) 頁： 983 2011年

16aSD-7 J-PARC MLFでのドップラーシフターを用いた超冷中性子の生成III(16aSD ニュートリノ・Bの物理・中性子EDM,素粒子実験領域) Open Access

今城想平, 藤岡宏之, 清水裕彦, 三島賢ニ, 吉岡瑞樹, 北口雅暁, 日野正裕

日本物理学会講演概要集 66.2.1 巻 ( 0 ) 頁： 15 2011年

28aGB-7 J-PARC MLFでのドップラーシフターを用いた超冷中性子の生成II(28aGB ニュートリノ・中性子・その他,素粒子実験領域) Open Access

今城想平, 藤岡宏之, 清水裕彦, 三島賢二, 吉岡瑞樹, 北口雅暁, 日野正裕

日本物理学会講演概要集 66.1.1 巻 ( 0 ) 頁： 31 2011年

28aGB-8 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(28aGB ニュートリノ・中性子・その他,素粒子実験領域) Open Access

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 66.1.1 巻 ( 0 ) 頁： 31 2011年

Filaggrin gene defects and the risk of developing allergic disorders

Osawa R., Akiyama M., Shimizu H.

Allergology International 60 巻 ( 1 ) 頁： 1 - 9 2011年

出版者・発行元：Allergology International

Filaggrin is a key protein that facilitates terminal differentiation of the epidermis and formation of the skin barrier. Mutations in the gene encoding filaggrin (FLG) have been identified as the cause of ichthyosis vulgaris (IV) and have been shown to be major predisposing factors for atopic dermatitis (AD). Approximately 40 loss-offunction FLG mutations have been identified in patients with ichthyosis vulgaris (IV) and/or atopic dermatitis (AD) in Europe and Asia. Major differences exist in the spectra of FLG mutations observed between different ancestral groups. Notably, prevalent FLG mutations are distinct between European and Asian populations. Many cohort studies on FLG mutations in AD have revealed that approximately 25-50% of AD patients harbour filaggrin mutations as a predisposing factor. In addition, FLG mutations are significantly associated with ADassociated asthma. The risk for developing allergic rhinitis is also significantly higher with a FLG mutation, both with and without accompanying AD. Recent studies have hypothesized that skin barrier defects caused by FLG mutations allows allergens to penetrate the epidermis and to interact with antigen-presenting cells, leading to the development of atopic disorders including asthma. The restoration of skin barrier function seems a feasible and promising strategy for prophylactic treatment of AD patients with FLG mutations. © 2011 Japanese Society of Allergology.

DOI： 10.2332/allergolint.10-RAI-0270

Scopus

Longitudinal-gradient magnet for time focusing of ultra-cold neutrons Open Access

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

2ND INTERNATIONAL WORKSHOP ON THE PHYSICS OF FUNDAMENTAL SYMMETRIES AND INTERACTIONS (PSI) 17 巻頁： 20 - 29 2011年

出版者・発行元：Physics Procedia

A gradient DC magnet is designed using 3D magnetic field analysis code. This magnet, referred to as a B0 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≤ y ≤ 3 cm at any z position in the spin-flipping region. Tracking simulations show that the B0 magnet 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

Open Access

Web of Science

Scopus

Applications of 3He neutron spin filters on the small-angle neutron scattering spectrometer SANS-J-II Open Access

Sakaguchi Y., Kira H., Oku T., Shinohara T., Suzuki J., Sakai K., Nakamura M., Aizawa K., Arai M., Noda Y., Koizumi S., Takeda M., Endoh Y., Chang L.J., Arimoto Y., Ino T., Shimizu H.M., Kamiyama T., Ohoyama K., Hiraka H., Tsutsumi K., Yamada K., Kakurai K.

Journal of Physics Conference Series 294 巻 ( 1 ) 2011年

出版者・発行元：Journal of Physics Conference Series

A polarized 3He neutron spin filter has been applied to polarization analysis on the small-angle neutron scattering spectrometer SANS-J-II at JRR-3. Measurements were taken on silver behenate, which has several coherent peaks in the small-angle region with a background of spin incoherent hydrogen scattering. Here we demonstrate that the coherent and spin incoherent scattering were successfully separated by the polarization analysis using the 3He spin filter on the instrument. © Published under licence by IOP Publishing Ltd.

DOI： 10.1088/1742-6596/294/1/012017

Open Access

Scopus

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

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

Ipac 2010 1st International Particle Accelerator Conference 頁： 427 - 429 2010年12月

出版者・発行元：Ipac 2010 1st International Particle Accelerator Conference

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 ø15 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 Å ≤ λ ≤ 48 Å 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)(PEO<inf>100</inf>-PPO <inf>65</inf>-PEO<inf>100</inf>) called Pluronic F127 as a sample, which has been well studied since 1990' [4]. The measureable q range of this system were 0.009 Å-1 ≤ q ≤ 0.3 Å-1 or 0.004 Å-1 q ≤ 0.08 Å-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.

Scopus

Practical Applications of Permanent Magnet Multipoles

Iwashita, Y; Ichikawa, M; Yamada, M; Sugimoto, T; Tongu, H; Fujisawa, H; Masuzawa, M; Tauchi, T; Oku, T; Hirota, K; Shimizu, HM; Shi, C; Zhu, Y

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 20 巻 ( 3 ) 頁： 842 - 845 2010年6月

出版者・発行元：IEEE Transactions on Applied Superconductivity

Permanent magnets are superior to electromagnets in generating strong multipole magnetic fields. Their fields are sometimes stronger than those that can be generated by superconducting magnets with the same bore radius, when the number of poles are higher. Three fabricated multipoles including a quadrupole magnet for the ILC (International Linear Collider) final focus doublet, a quadrupole magnets as a spin filter for cold neutrons, and a sextupole magnet for neutron beam focusing are described. © 2006 IEEE.

DOI： 10.1109/TASC.2010.2040604

Web of Science

Scopus

J-PARCにおける中性子基礎物理

清水裕彦

波紋 20 巻 ( 1 ) 頁： 25 - 29 2010年

記述言語：日本語出版者・発行元：日本中性子科学会

A new beamline for a fundamental physics experiment has been built at the BL05 port in the Materials and Life Science Facility (MLF) in Japan Proton Accelerator Research Complex (J-PARC), and the first neutron beam was delivered on December 9th, 2008. This beamline is designed using novel techniques of neutron optics, and it is termed "Neutron Optics and Physics (NOP)." The beam from the moderator is deflected by multi-channel supermirrors and split into three branches for individual experiments. Physics with cold neutrons at the NOP beamline is discussed.

DOI： 10.5611/hamon.20.1_25

CiNii Research

13aSK-8 J-PARC MLFでのドップラーシフターを用いた超冷中性子の生成(13aSK LFV検出器・中性子実験・光検出器,素粒子実験領域) Open Access

今城想平, 藤岡宏之, 清水裕彦, 三島賢二, 吉岡瑞樹, 北口雅暁, 日野正裕

日本物理学会講演概要集 65.2.1 巻 ( 0 ) 頁： 18 2010年

23pHT-8 偏極^3He中性子スピンフィルターの^3Heガス偏極度の評価手段の開発(23pHT 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)) Open Access

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, 有本靖, 猪野隆, 清水裕彦, 神山崇, 佐藤他加志, 佐藤孝一, 加美山隆, 鬼柳善明, 堤健之, 大山研司, 平賀晴弘, 山田和芳

日本物理学会講演概要集 65.1.4 巻 ( 0 ) 頁： 1016 2010年

23pHT-7 偏極^3He中性子スピンフィルターのガラスセルの開発(23pHT 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)) 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, 堤健之, 山田和芳

日本物理学会講演概要集 65.1.4 巻 ( 0 ) 頁： 1016 2010年

23aEF-4 focusing VCN-SANSによる水溶性3ブロック共重合体(PEO-PPO-PEO)溶液の温度相転移現象の観測(23aEF 高分子・ゲル,領域12(ソフトマター物理,化学物理,生物物理)) Open Access

山田雅子, 岩下芳久, 金谷利治, 市川雅浩, 頓宮拓, 清水裕彦, 山田悟史, 三島賢二, 広田克也, 日野正裕, 北口雅暁

日本物理学会講演概要集 65.1.2 巻 ( 0 ) 頁： 396 2010年

22pBF-4 J-PARCにおける超冷中性子生成のためのドップラーシフターの開発(22pBF 加速器電源・J-PARC・中性子源・FFAG加速器(電源・負荷・配線の対称化),ビーム物理領域) Open Access

今城想平, 藤岡宏之, 清水裕彦, 三島賢二, 吉岡瑞樹, 北口雅暁, 日野正裕

日本物理学会講演概要集 65.1.1 巻 ( 0 ) 頁： 142 2010年

Development of modulating permanent magnet sextupole lens for focusing of pulsed cold neutrons

Yamada M., Iwashita Y., Ichikawa M., Tongu H., Fujisawa H., Shimizu H.M., Ino T., Mishima K., Taketani K., Morishima T., Mutou S., Yoshioka T., Oku T., Sakai K., Shinohara T., Suzuki J.I., Hirota K., Otake Y., Sato H., Seki Y., Kawasaki S., Otono H., Komamiya S., Yamashita S., Kamiya Y., Geltenbort P.

Proceedings of the 24th Linear Accelerator Conference Linac 2008 頁： 263 - 265 2009年12月

出版者・発行元：Proceedings of the 24th Linear Accelerator Conference Linac 2008

Cold neutron beams can be focused by a strong sextupole magnetic field. A permanent magnet sextupole lens whose focusing strength can be synchronously modulated at the rate of pulsed cold neutron beams is under development. This device should keep the focal point for pulsed neutron beams whose wavelength spreads as a function of time of flight. This kind of device improves the utilization of valuable neutrons and saves experiment time and costs. It will raise linac based small neutron sources as a good counter part to large powerful neutron facilities. Experimental results that were obtained at Institute Laue-Langevin (ILL) are also described.

DOI： 10.1016/j.physb.2009.06.132

Scopus

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