Publication: 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
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Foust, F. R.
Bell, T. F.
Spasojevic, M.
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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.
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Aip Publishing
Subject
Landau damping simulation, Numerical plasma physics, Plasma wave damping, Plasma dispersion function
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Physics of Plasmas
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DOI
10.1063/1.3602123
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