Accurate modeling of plasma acceleration with arbitrary order pseudospectral particleincell methods
Abstract
Particle in Cell (PIC) simulations are a widely used tool for the investigation of both laser and beamdriven plasma acceleration. It is a known issue that the beam quality can be artificially degraded by numerical Cherenkov radiation (NCR) resulting primarily from an incorrectly modeled dispersion relation. Pseudospectral solvers featuring infinite order stencils can strongly reduce NCR—or even suppress it—and are therefore well suited to correctly model the beam properties. For efficient parallelization of the PIC algorithm, however, localized solvers are inevitable. Arbitrary order pseudospectral methods provide this needed locality. Yet, these methods can again be prone to NCR. Here, we show that acceptably low solver orders are sufficient to correctly model the physics of interest, while allowing for parallel computation by domain decomposition.
 Publication:

Physics of Plasmas
 Pub Date:
 March 2017
 DOI:
 10.1063/1.4978569
 arXiv:
 arXiv:1611.05712
 Bibcode:
 2017PhPl...24c3115J
 Keywords:

 Physics  Accelerator Physics;
 Physics  Plasma Physics
 EPrint:
 Physics of Plasmas 24, 033115 (2017)