• Open Access

Advances in numerical methods under wiggler period averaging for free electron laser simulation

Kilean Hwang and Ji Qiang
Phys. Rev. Accel. Beams 21, 120702 – Published 7 December 2018

Abstract

Advances in numerical methods for free-electron-laser (FEL) simulation under wiggler period averaging (WPA) are presented. First, WPA is generalized using the perturbative Lie map method. The conventional WPA is identified as the leading order contribution. Next, the shot-noise model under WPA is improved along with a particle migration scheme across the numerical mesh. The artificial shot noise arising from particle migration is suppressed. The improved model also allows using arbitrary mesh size, slippage resolution, and integration step size. These advances will improve modeling of longitudinal beam profile evolution for fast FEL simulation.

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  • Received 27 August 2018

DOI:https://doi.org/10.1103/PhysRevAccelBeams.21.120702

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Accelerators & Beams

Authors & Affiliations

Kilean Hwang* and Ji Qiang

  • Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley 94720, California, USA

  • *kilean@lbl.gov
  • jqiang@lbl.gov

Article Text

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Issue

Vol. 21, Iss. 12 — December 2018

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