DOI: https://doi.org/10.26089/NumMet.v19r218

Numerical modeling of plasma oscillations with consideration of electron thermal motion

Authors

  • A.A. Frolov
  • E.V. Chizhonkov

Keywords:

numerical simulation
finite-difference method
plasma oscillations
traveling waves
perturbation method

Abstract

The effect of electron thermal motion on plane nonrelativistic nonlinear plasma oscillations is studied. It is shown numerically and analytically that when the thermal motion is taken into account, the oscillations are transformed to a traveling wave. At the same time, the wave amplitude grows with increasing temperature, which promotes the removal of energy from the initial region of oscillation localization. A finite-difference scheme is proposed for the numerical simulation on the basis of Eulerian variables. When using the Lagrangian variables to approximate small perturbations, the distributions of electron density maxima are obtained depending on the plasma temperature. The obtained analytical results are in good agreement with numerical experiments.

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Published

2018-05-15

Issue

Vol. 19 (2018): Issue 2.

Section

Section 1. Numerical methods and applications

Author Biographies

A.A. Frolov

Joint Institute for High Temperatures of RAS (JIHT RAS)
• Senior Researcher

E.V. Chizhonkov

Lomonosov Moscow State University
• Professor

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