Discontinuous Galerkin particle-in-cell simulation of longitudinal plasma wave damping and comparison to the Landau approximation and the exact solution of the dispersion relation

PDF (Online Viewing) 2011-11.pdf
Publication Type Journal Article
VLF Publication Number 2011-11
Year Of Publication 2011
Authors Foust, FR, Spasojevic, M, Inan, US
Abstract We present results showing the measured Landau damping rate using a high-order discontinuous Galerkin particle-in-cell (DG-PIC) [G. B. Jacobs and J. S. Hesthaven, J. Comput. Phys. 214, 96 (2006)] method. We show that typical damping rates measured in particle-in-cell (PIC) simulations can differ significantly from the linearized Landau damping coefficient and propose a simple numerical method to solve the plasma dispersion function exactly for moderate to high damping rates. Simulation results show a high degree of agreement between the high-order PIC results and this calculated theoretical damping rate.
Journal Physics of Plasmas
Volume 18
Pages 2111
doi 10.1063/1.3602123
Date Published Jun
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