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Hukuma, H.

Paper Title Page
ROPB005 Recent Experiment Results on Fast Ion Instability at 2.5 GeV PLS 466
 
  • E.-S. Kim, Y.J. Han, J.Y. Huang, I.S. Ko, P.C.D. Park, S.J. Park
    PAL, Pohang, Kyungbuk
  • H. Hukuma, H. Ikeda
    KEK, Ibaraki
  
  We present recent experiment results on the fast ion instability that were performed at the PLS storage ring. With higher vacuum pressures of three orders of magnitude than nominal one by He gas injection into the ring, increases of a factor of around three in the vertical beam size were observed by interferometer system. From the various measurement results, we estimated growth times for the instability as a funcion of vacuum pressure and beam current. We also compared the results with those of the computer simulations and analytical calculations.