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Xia, J. W.

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TUCOB01 Stochastic Cooling Project at the Experimental Storage Ring, CSRe at IMP 64
 
  • J. X. Wu, J. W. Xia, Y. Zhang
    IMP, Lanzhou
  • F. Caspers
    CERN, Geneva
  • T. Katayama, F. Nolden
    GSI, Darmstadt
 
  Stochastic cooling at the experimental Cooler Storage Ring, CSRe at the Institute of Modern Physics (IMP) in China, will be used mainly for the experiments with radioactive fragment beams. Those RI beams arrive from the fragment separator with the emittance of 20-50 mm. mrad and the momentum spread Dp/p of ± 0.5~1.0 %. The equipped electron cooler is not able to cool down this hot beam within enough short period. Stochastic cooling is effective for these RI beams to reduce the emittance to less than 5 mm.mrad and Dp/p of 5·10-4 within 2-20 sec. After the stochastic pre-cooling, the electron cooling will further cool down the emittance and Dp/p within several seconds. The paper gives the design of the stochastic cooling system and the simulation results. The new developed forward traveling wave structure is presented as well as the measured results of test model.  
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TUPS14 Simulation Study of Stochastic Cooling at CSRe IMP  
 
  • X. J. Hu, H. Jia, J. X. Wu, J. W. Xia, Y. J. Yuan, Y. Zhang
    IMP, Lanzhou
  • T. Katayama
    GSI, Darmstadt
 
  The stochastic cooling of Radio Isotope beam is planned at the storage ring CSRe at the Institute of Modern Physics, Lanzohu in China. The stochastic cooling is planned as a pre-cooling of the electron cooling. The initial transverse emittance is assumed as 30 Pi mm.mrad, and the relative momentum spread is ± 5·10-3. The particle number is as small as 5·103. The palmer method is conceived as the PU and Kicker are installed at the finite dispersion section of the bending magnet chamber. In the present paper, details of simulation results of longitudinal and transverse cooling process are discussed.