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A numerical method based on the Fourier-Fourier transform approach for modeling 1-D electron plasma evolutionA numerical method is presented for studying one-dimensional electron plasma evolution under typical interplanetary conditions. The method applies the Fourier-Fourier transform approach to a plasma model that is a generalization of the electrostatic Vlasov-Poisson system of equations. Conservation laws that are modified to include the plasma model generalization and also the boundary effects of nonperiodic solutions are given. A new conservation law for entropy in the transformed space is then introduced. These conservation laws are used to verify the numerical solutions. A discretization error analysis is presented. Two numerical instabilities and the methods used for their suppression are treated. It is shown that in interplanetary plasma conditions, the bump-on-tail instability produces significant excitation of plasma oscillations at the Bohm-Gross frequency and its second harmonic. An explanation of the second harmonic excitation is given in terms of wave-wave coupling during the growth phase of the instability.
Document ID
19830052605
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Klimas, A. J.
(NASA Goddard Space Flight Center Laboratory for Extraterrestrial Physics, Greenbelt, MD, United States)
Date Acquired
August 11, 2013
Publication Date
May 1, 1983
Publication Information
Publication: Journal of Computational Physics
Volume: 50
ISSN: 0021-9991
Subject Category
Plasma Physics
Accession Number
83A33823
Distribution Limits
Public
Copyright
Other

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