Author: Oyama, T.
Paper Title Page
WEPOR020 Beam Loss Estimation by Measurement of Secondarily Produced Photons under High Average-current Operations of Compact ERL in KEK 2711
  • H. Matsumura, K. Haga, K. Hozumi, T. Miura, S. Nagaguro, T. Obina, T. Oyama, S. Sakanaka, A. Toyoda
    KEK, Ibaraki, Japan
  • N. Yoshihara
    Tokyo Nuclear Service Co. Ltd., Ibaraki, Japan
  To increase the beam current in the Compact Energy Recovery Linac (cERL) at the High Energy Accelerator Research Organization (KEK), the beam loss must be reduced to less than 0.01% during the transportation of 20 MeV electrons in order to suppress the radiation dose outside the accelerator room. Beam loss locations were successfully identified using the gold activation method, and the beam loss rate was estimated by com-paring the measured dose rate with the simulated dose rate on the roof of the cERL room. Beam operation with beam current of 0.90 mA was achieved with a beam loss rate of less than 0.01%.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOR020  
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