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

Conference · Fri Nov 02 00:00:00 EDT 2007 · Conf.Proc.C070625:1179,2007

DOI:https://doi.org/10.1109/PAC.2007.4441022· OSTI ID:918950

Pogorelov, I; Qiang, J; Ryne, R; Venturini, M; Zholents, A; Warnock, R

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.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 918950
• Report Number(s): SLAC-PUB-12944; TRN: US0806260
• Journal Information: Conf.Proc.C070625:1179,2007, Conference: Prepared for Particle Accelerator Conference (PAC 07), Albuquerque, New Mexico, 25-29 Jun 2007
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ELECTRON BEAMS
FREE ELECTRON LASERS
HEATERS
INSTABILITY
LASERS
SIMULATION
Accelerators
ACCPHY