Online full two-dimensional imaging of pulsed muon beams at J-PARC MUSE using a gated image intensifier
ゲートイメージインテンシファイアを用いたJ-PARC MUSEにおけるパルスミュオンビームのオンライン完全二次元イメージング
伊藤 孝; 豊田 晃久*; 髭本 亘; 田島 美典*; 松田 恭幸*; 下村 浩一郎*
Ito, Takashi; Toyoda, Akihisa*; Higemoto, Wataru; Tajima, Minori*; Matsuda, Yasuyuki*; Shimomura, Koichiro*
A new muon beam profile monitor (MBPM) was developed to diagnose pulsed muon beams in J-PARC MUSE, mainly composed of a scintillation screen, a gated image intensifier (II), and a cooled CCD camera. The MBPM was designed to be compact so that it could be inserted into the bore of the $$mu$$SR spectrometer in the D1 area and used concurrently. The spatial resolution of the MBPM was evaluated to be in the range from one to two line-pair/mm, depending on II gain. Such high-resolution muon beam profiles were obtained online for a positive muon beam with a kinetic energy of $$sim$$ 4 MeV. The contribution from decay positrons was significantly reduced owing to II gating. The linearity of the MBPM was evaluated on the bases of the number of decay positrons monitored by the $$mu$$SR spectrometer. A linear response within five percent deviations was confirmed over more than two orders of magnitude. In addition, 3D imaging capability, use in vacuum, and immunity against moderate magnetic fields were demonstrated.
使用言語 : English
掲載資料名 : Nuclear Instruments and Methods in Physics Research A
: 754
ページ数 : p.1 - 9
発行年月 : 2014/08
出版社名 : Elsevier
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登録番号 : AA20130550
抄録集掲載番号 : 42000906
論文投稿番号 : 14564
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