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Collisional transport for a superthermal ion species in magnetized plasma

Published online by Cambridge University Press:  13 March 2009

F. Cozzani  and
W. Horton
F. Cozzani
Affiliation:
Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712–1060
W. Horton
Affiliation:
Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712–1060
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Abstract

The transport theory of a high-energy ion species injected isotropically in a magnetized plasma is considered for arbitrary ratios of the high-energy ion cyclotron frequency to the collisional slowing down time. The assumptions of (i) low fractional density of the high-energy species and (ii) average ion speed faster than the thermal ions and slower than the electrons are used to decouple the kinetic equation for the high-energy species from the kinetic equations for background ions and electrons. The kinetic equation is solved by a Chapman–Enskog expansion in the strength of the gradients; an equation for the first correction to the lowest-order distribution function is obtained without scaling a priori the collision frequency with respect to the gyrofrequency. Various transport coefficients are explicitly calculated for the two cases of a weakly and a strongly magnetized plasma.

Type
Research Article
Information
Journal of Plasma Physics , Volume 36 , Issue 3 , December 1986 , pp. 313 - 328
Copyright
Copyright © Cambridge University Press 1986

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References

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