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THPP067 Analysis of Longitudinal Space Charge Effects With Radial Dependence simulation, bunching, electron, space-charge 636
 
  • J. Wu, P. Emma, Z. Huang
    SLAC, Menlo Park, California
  
 

Funding: Work supported by the U.S. Department of Energy under Contract No. DE-AC02-76SF00515.

Longitudinal space charge (LSC) force can be a main effect driving the microbunching instability in the linac for an x-ray free-electron laser (FEL). In this paper, the LSC-induced beam modulation is studied using an integral equation approach that takes into account the transverse (radial) variation of LSC field. Changes of beam energy and the transverse beam size can be also incorporated. We discuss the validity of this approach and compare it with other analyses as well as numerical simulations. We apply this approach to study the LSC effect in the LCLS accelerator