TUCOC  —  Electron cooling   (13-Sep-11   16:50—17:20)

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TUCOC01 Simulations of an FEL Amplifier for Coherent Electron Cooling  
 
  • I. V. Pogorelov, D. L. Bruhwiler, B. T. Schwartz
    Tech-X, Boulder, Colorado
  • Y. Hao, V. Litvinenko, G. Wang
    BNL, Upton, Long Island, New York
  • S. Reiche
    PSI, Villigen
  
  Next-generation ion colliders will require effective cooling of high-energy hadron beams. Coherent electron cooling (CeC) can in principle cool relativistic hadron beams on orders-of-magnitude shorter time scales than other techniques*. Particle-in-cell (PIC) simulations of a CeC modulator, performed with the VORPAL framework, generate macro-particle distributions with subtle but important phase space correlations. It is essential to couple these macro-particles into a 3D simulation code for the free-electron laser (FEL) amplifier, while retaining all details of the 6D phase space coordinates. We will present and discuss our recent results of modeling the FEL amplifier stage of the CeC process, including work on generating a 3D distribution of bunching parameters for GENESIS and an alternative approach for self-consistent treatment of shot noise and spontaneous radiation**, with no need to reorder the FEL macro-particles uniformly in the ponderomotive phase.

* V. N. Litvinenko and Y. S. Derbenev, Phys. Rev. Lett. 102, 114801 (2009)
** V. N. Litvinenko, "Macro-particle FEL model with self-consistent spontaneous radiation" (2002), unpublished

 
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