Evaluation of two-stage system for neutron measurement aiming at increase in count rate at Japan Atomic Energy Agency - Fusion Neutronics Source
Japan Atomic Energy Agency-Fusion Neutronics Sourceにおける計数率向上を目指した中性子計測のための2段検出器の評価
篠原 孝司; 石井 啓一*; 落合 謙太郎; 馬場 護*; 助川 篤彦; 笹尾 眞實子*; 北島 純男*
Shinohara, Koji; Ishii, Keiichi*; Ochiai, Kentaro; Baba, Mamoru*; Sukegawa, Atsuhiko; Sasao, Mamiko*; Kitajima, Sumio*
A neutron flux array is one of the important plasma diagnostics to obtain the information on fast ion population. However, the limited flux owing to its collimator results in the small number of pulse counts and the large statistical error. The method to increase the pulse counts is required. Here, we propose a multi-stage neutron detection system, in which several sets of a scintillator and photo-multiplier tube (PMT) are placed in a line-of-sight. In order to evaluate the performance of the multi-stage detection system, we have carried out experiments on a two-stage detection system using a neutron beam at FNS (Fusion Neutronics Source) of JAEA (Japan Atomic Energy Agency). The results have shown the concept of the multi-stage detection system works as expected. In the best setup, the test two-stage system reached about 1.7 (1.8) times the efficiency of a single scintillator and PMT system for 2.54 (14) MeV neutrons.
使用言語 : English
掲載資料名 : Review of Scientific Instruments
: 85
: 11
ページ数 : p.11E823_1 - 11E823_4
発行年月 : 2014/11
出版社名 : American Institute of Physics
発表会議名 : 20th Topical Conference on High-Temperature Plasma Diagnostics (HTPD 2014)
開催年月 : 2014/06
開催都市 : Atlanta
開催国 : U. S. A.
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登録番号 : BB20140531
抄録集掲載番号 : 42001324
論文投稿番号 : 14963
Accesses  (From Jun. 2, 2014)
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