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Report No.

Development of the beam halo monitor in the J-PARC 3-GeV RCS

Yoshimoto, Masahiro ; Yamamoto, Kazami  ; Saha, P. K.  ; Meigo, Shinichiro  ; Hotchi, Hideaki ; Hayashi, Naoki ; Okabe, Kota ; Kinsho, Michikazu 

Transverse beam halo is one of the most important beam parameters due to limit the performance of the high intensity beam accelerator. Therefore the transverse beam halo measurement is required to increase the beam power of the J-PARC 3-GeV RCS. In order to measure the transverse beam halo during the beam operation, halo monitors which are horizontal and vertical scanning aluminum plates type has been installed in the extraction beam line. But the residual secondary electrons hindered the beam halo diagnostic. We report how to take measures against the intrinsic issues of this monitor.



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