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Approximation of the dielectric properties of Maxwellian plasmas - Dispersion functions and physical constraintsThe dielectric properties of Maxwellian plasmas are approximated using high Pade approximants to the dispersion function and direct approximation of the distribution. Physical constraints on permissible approximations are discussed, and it is found that some previously published results can lead to predictions of qualitatively incorrect wave properties, including unphysical negative damping. Approximate dispersion functions for Maxwellian distributions are given explicitly, and some of the effects of these approximations on the resulting dispersion are discussed. The approximations discussed here are of use both in analytical work and in accelerating large-scale numerical computations.
Document ID
19890040678
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Robinson, P. A.
(Colorado Univ. Boulder, CO, United States)
Newman, D. L.
(Colorado, University Boulder, United States)
Date Acquired
August 14, 2013
Publication Date
December 1, 1988
Publication Information
Publication: Journal of Plasma Physics
Volume: 40
ISSN: 0022-3778
Subject Category
Plasma Physics
Accession Number
89A28049
Funding Number(s)
CONTRACT_GRANT: NSF ATM-85-11906
CONTRACT_GRANT: NAGW-91
CONTRACT_GRANT: NSG-7287
Distribution Limits
Public
Copyright
Other

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