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Stein, H.J.

Paper Title Page
WEBO04

 Electron Cooling of Proton Beam at COSY and S-LSR 

  • Yu.Korotaev, I.Meshkov, A.Sidorin, A.Smirnov
    JINR Russia
  • J. Dietrich, V. Kamerdjiev, R. Maier, D. Prasuhn, H.J. Stein, H. Stockhorst,
    ForschungszentrumJuelich Germany
  • A. Noda, T. Shirai,
    Institute for Chemical Research Kyoto University, Japan

Results of experimental studies of the electron cooling of a proton beam at COSY (Juelich, Germany) are presented. Intensity of the proton beam is limited by two general effects: particle loss directly after the injection and development of instability in a deep cooled ion beam. Results of the instability investigations performed at COSY during last years are presented in this report in comparison with previous results from HIMAC (Chiba, Japan) CELSIUS (Uppsala, Sweden) and LEAR (CERN). An influence of secondary ions stored in cooling electron beam was studied, the results are presented. The methods of the instability suppression, which allow increasing the cooled beam intensity, are described. Electron cooling at COSY was also investigated at extremely low proton current. Experimental results for the attempt to achieve of ordered state of proton beam is presented. This work is supported by RFBR grant # 05-02-16320 and INTAS grant #03-54-5584.

 

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