Author: Chin, Y.H.
Paper Title Page
MOPS004 Mitigation of Beam Instability due to Space Charge Effects at 3 GeV RCS in J-PARC 595
 
  • Y. Shobuda, M. Yamamoto
    JAEA/J-PARC, Tokai-mura, Japan
  • Y.H. Chin
    KEK, Ibaraki, Japan
  • F. Tamura
    KEK/JAEA, Ibaraki-Ken, Japan
 
  In order to accomplish high intensity proton beams, it is important to identify the impedance source in accelerators. At 3 GeV rapid cycling synchrotron (RCS) in Japan Proton Research Complex (J-PARC), the kicker impedance is the most dominant among such impedance sources. Beam instability can be observed by correcting chromaticity during the acceleration. Growth rate due to the beam instability can be reduced by making peak current larger (bunching factor smaller). In other words, it is experimentally found that space charge effects mitigate the beam instability.