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Report No.

Transverse H$$^{-}$$ beam halo scraper system in the J-PARC L3BT

Okabe, Kota  ; Yamamoto, Kazami   ; Yoshimoto, Masahiro  ; Kinsho, Michikazu  

In the Japan Proton Accelerator Research Complex (J-PARC) 3-GeV rapid cycle synchrotron (RCS), transverse beam halo scraping for the injection beam is required to increase the output beam power. The transverse scraper system at the Linac-RCS beam transport line (L3BT) was utilized in a nominal beam operation because the area of the scraper section was contaminated when the scrapers were working. In the summer-autumn period of 2013, we installed the new beam-halo scrapers which had optimized scraper heads for mitigation of the radiation around the scraper system. In this paper, we report a preliminary result for a halo scraper at the L3BT.



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