Author: Harada, H.
Paper Title Page
MOPAB174 Foil Hits Reduction by Minimizing Injection Beam Size at the Foil in J-PARC RCS 590
 
  • P.K. Saha, H. Harada, K. Okabe, F. Tamura, M. Yoshimoto
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
  • H. Hotchi
    KEK, Tokai, Ibaraki, Japan
 
  Funding: Pranab Kumar Saha
The uncontrolled beam loss caused by the foil scattering of the circulating beam during multi-turn charge-exchange injection is one of the main sources for high residual radiation at the injection area of J-PARC 3-GeV rapid cycling synchrotron. We studied to reduce foil hits of the circulating beam by minimizing the vertical injection beam size at the foil and using a smaller vertical foil size. The vertical foil size was reduced according to the injection beam size by maintaining the stripping efficiency. As a result, the number of circulating beam passing through foil was significantly reduced due to smaller foil size. The simulation and measurement results of the foil hits reduction are presented in this paper.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB174  
About • paper received ※ 20 May 2021       paper accepted ※ 31 May 2021       issue date ※ 28 August 2021  
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