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Report No.

Development of a high-resolution beam imaging system for pulsed muon beams

Ito, Takashi   ; Toyoda, Akihisa*; Higemoto, Wataru  ; Tajima, Minori*; Matsuda, Yasuyuki*; Shimomura, Koichiro*

A high-resolution beam imaging system was newly developed for pulsed muon beams in J-PARC MUSE using a plastic scintillator, a gated image intensifier, and a cooled CCD camera. The system was optimized for observation of 4 MeV muon beams and designed so as to be used with an existing muSR spectrometer in the D1 area, J-PARC MUSE. High-resolution beam profiles were obtained for a surface muon beam after exposure to the beam for several tens of seconds. A contribution from decay positrons was significantly suppressed by gating of the image ntensifier. Details of test experiments (negative muon beam profiles in the D2 area, 3D beam imaging, noise reduction, etc.) were presented.



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