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Akiyama, A.

Paper Title Page
WGF03 Beam Loss Monitoring Using Proportional Counters at J-PARC 450
 
  • T. Toyama, A. Akiyama, Y. Hashimoto, S. Lee, H. Nakagawa, J.-I. Odagiri, T. Suzuki, M. Tejima, N. Yamamoto
    KEK, Ibaraki
  • N. Hayashi, K. Yamamoto
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
  • K. Satou
    J-PARC, KEK&JAEA, Ibaraki-ken
  
 

Proportional counter is adopted as a main beam loss monitor system for the RCS and MR of J-PARC. The advantages are signal amplification and radiation hardness. In our case the signal amplification more than 500 and the radiation hardness of not only component materials but also its sensitivity which keeps constant upto the charge accumulation of 0.0035 C/mm by Co-60 γ-ray source irradiation, corresponds more than several years operation. The rise time is an order of μs which satisfies the requirement of MPS (Machine Protection System). The system will be overviewed and the performance with radiation sources and beams will be reported comparing with the MARS simulation.