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Report No.
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Systematic beam loss study due to the foil scattering at the 3-GeV RCS of J-PARC

Saha, P. K.   ; Hotchi, Hideaki  ; Harada, Hiroyuki  ; Yoshimoto, Masahiro  ; Yamamoto, Kazami   ; Yamazaki, Yoshio ; Sugai, Isao*

The beam loss caused by the nuclear scattering together with the multiple Coulomb scattering at the stripping foil is one main concern of the uncontrolled beam losses in RCS of the J-PARC. In order to have a realistic understanding, a systematic study with both experiment and simulation has been carried out recently. A total of seven targets with different thicknesses were used and the measured beam losses were found to be consistent with the simulation. Such a realistic understanding becomes very useful in order to optimized the size and thickness of the stripping foil in connection with the RCS power upgrade scenario not only with the present injection beam energy of 181 MeV but also for the near future upgrade with 400 MeV.

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