Energy resolution of pulsed neutron beam provided by the ANNRI beamline at the J-PARC/MLF
J-PARC/MLF/ANNRIにおけるパルス中性子ビームのエネルギー分解能
木野 幸一*; 古坂 道弘*; 平賀 富士夫*; 加美山 隆*; 鬼柳 善明*; 古高 和禎; 後神 進史*; 原 かおる; 原田 秀郎; 原田 正英; 廣瀬 健太郎; 甲斐 哲也; 木村 敦; 金 政浩*; 北谷 文人; 小泉 光生; 前川 藤夫; 明午 伸一郎; 中村 詔司; 大井 元貴; 太田 雅之; 大島 真澄*; 藤 暢輔; 井頭 政之*; 片渕 竜也*; 水本 元治*; 堀 順一*
Kino, Koichi*; Furusaka, Michihiro*; Hiraga, Fujio*; Kamiyama, Takashi*; Kiyanagi, Yoshiaki*; Furutaka, Kazuyoshi; Goko, Shinji*; Hara, Kaoru; Harada, Hideo; Harada, Masahide; Hirose, Kentaro; Kai, Tetsuya; Kimura, Atsushi; Kin, Tadahiro*; Kitatani, Fumito; Koizumi, Mitsuo; Maekawa, Fujio; Meigo, Shinichiro; Nakamura, Shoji; Oi, Motoki; Ota, Masayuki; Oshima, Masumi*; Toh, Yosuke; Igashira, Masayuki*; Katabuchi, Tatsuya*; Mizumoto, Motoharu*; Hori, Junichi*
We studied the energy resolution of the pulsed neutron-beam of Accurate Neutron-Nucleus Reaction Measurement Instrument (ANNRI) at the Japan Proton Accelerator Research Complex/Materials and Life Science Experimental Facility (J-PARC/MLF). A simulation in the energy region from 0.7 meV to 1 MeV has been performed. Moreover, measurements have been done in the thermal and epithermal energies. The neutron energy resolution at ANNRI, which is determined by the time-of-flight technique, depends on the time structure of the neutron pulse. We obtained the neutron energy resolution as a function of the neutron energy by the simulation in the two operation modes of the neutron source: double and single bunch modes. In the double bunch mode, the resolution deteriorates above about 10 eV because the time structure of the neutron pulse splits into two peaks. The time structures at 13 energy points by measurements in the thermal energy region are in agreement with those of the simulation. In the epithermal energy region, the time structures at 17 energy points were obtained by measurements. The FWHM values of the time structures by the simulation and measurements are almost consistent. In the single bunch mode, the energy resolution is better than about 1% between 1 meV and 10 keV at the neutron source operation of 17.5 kW.
使用言語 : English
掲載資料名 : Nuclear Instruments and Methods in Physics Research A
: 736
:
ページ数 : p.66 - 74
発行年月 : 2014/02
出版社名 : Elsevier
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受委託・共同研究相手機関 : 京都大学北海道大学東京工業大学
 
登録番号 : AA20130709
抄録集掲載番号 : 42001309
論文投稿番号 : 14948
Accesses  (From Jun. 2, 2014)
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