Simulation of the Microbunching Instability in Beam Delivery Systems for Free Electron Lasers

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In this paper, we examine the growth of the microbunching instability in the electron beam delivery system of a free electron laser (FEL). We present the results of two sets of simulations, one conducted using a direct Vlasov solver, the other using a particle-in-cell code Impact-Z with the number of simulation macroparticles ranging up to 100 million. Discussion is focused on the details of longitudinal dynamics and on numerical values of uncorrelated (slice) energy spread at different points in the lattice. In particular, we assess the efficacy of laser heater in suppression of the instability, and look at the interplay ... continued below

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3 pages

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Pogorelov, I.; U., /Northern Illinois; Qiang, J.; Ryne, R.; Venturini, M.; Zholents, A. et al. November 2, 2007.

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In this paper, we examine the growth of the microbunching instability in the electron beam delivery system of a free electron laser (FEL). We present the results of two sets of simulations, one conducted using a direct Vlasov solver, the other using a particle-in-cell code Impact-Z with the number of simulation macroparticles ranging up to 100 million. Discussion is focused on the details of longitudinal dynamics and on numerical values of uncorrelated (slice) energy spread at different points in the lattice. In particular, we assess the efficacy of laser heater in suppression of the instability, and look at the interplay between physical and numerical noise in particle-based simulations.

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3 pages

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  • Journal Name: Conf.Proc.C070625:1179,2007; Conference: Prepared for Particle Accelerator Conference (PAC 07), Albuquerque, New Mexico, 25-29 Jun 2007

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  • Report No.: SLAC-PUB-12944
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 918950
  • Archival Resource Key: ark:/67531/metadc878924

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  • November 2, 2007

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 7, 2016, 9:15 p.m.

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Pogorelov, I.; U., /Northern Illinois; Qiang, J.; Ryne, R.; Venturini, M.; Zholents, A. et al. Simulation of the Microbunching Instability in Beam Delivery Systems for Free Electron Lasers, article, November 2, 2007; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc878924/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.