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Transfer integrals for fully ionized gases

Published online by Cambridge University Press:  13 March 2009

Horst Fichtner ,
S. Ranga Sreenivasn  and
Norbert Vormbrock
Horst Fichtner
Affiliation:
Department of Physics and Astronomy, University of Calgary, 2500 University Drive NW., Calgary, Alberta, CanadaT2N 1N4 Institut für Astrophysik und Extraterrestrische Forschung der Universität Bonn, Auf dem Hiigel 71, D-53121 Bonn, Germany
S. Ranga Sreenivasn
Affiliation:
Department of Physics and Astronomy, University of Calgary, 2500 University Drive NW., Calgary, Alberta, CanadaT2N 1N4
Norbert Vormbrock
Affiliation:
Institut für Astrophysik und Extraterrestrische Forschung der Universität Bonn, Auf dem Hiigel 71, D-53121 Bonn, Germany BASF-AG, ZX/ZC-C 13, D-67056 Ludwigshafen, Germany
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Abstract

The general transfer integrals describing the collisional exchange of momentum and energy between the constituents of multicoimponent gases are evaluated for different plasma scenarios characterized by Maxwellian as well as non-Maxwellian distribution functions of the plasma species. Following a brief presentation of the standard approximation frequently employed in the literature, a comparison of numerical evaluations of the transfer integrals for various distribution functions reveals significant differences in the corresponding collisional momentum and energy exchange rates, which are shown to depend mainly on the core structure of the distributions. We demonstrate the inadequacy of the standard approximation and hence the importance of an accurate evaluation of the transfer integrals with an application to the electron proton as well as the helium proton interaction in the solar wind plasma.

Type
Research Article
Information
Journal of Plasma Physics , Volume 55 , Issue 1 , February 1996 , pp. 95 - 120
Copyright
Copyright © Cambridge University Press 1996

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