Simulations of the microbunching instability in beam deliverysystems for free electron lasers

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

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Pogorelov, Ilya; Qiang, Ji; Ryne, Rob; Venturini, Marco; Zholents, Alexander & Warnock, Robert June 29, 2007.

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Description

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

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  • Particle Accelerator Conference 2007,Albuquerque, NM, 06/25-29/2007

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  • Report No.: LBNL--63024
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 910599
  • Archival Resource Key: ark:/67531/metadc877067

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  • June 29, 2007

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  • Sept. 22, 2016, 2:13 a.m.

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Pogorelov, Ilya; Qiang, Ji; Ryne, Rob; Venturini, Marco; Zholents, Alexander & Warnock, Robert. Simulations of the microbunching instability in beam deliverysystems for free electron lasers, article, June 29, 2007; United States. (digital.library.unt.edu/ark:/67531/metadc877067/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.