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Comment on negative diffusion coefficients in quasi-linear theory

Published online by Cambridge University Press:  13 March 2009

David Montgomery  and
Stephen Bodner
David Montgomery
Affiliation:
Department of Physics and AstronomyUniversity of Iowa, Iowa City 52240, U. S. A.
Stephen Bodner
Affiliation:
Lawrence Radiation Laboratory, University of California, Livermore 94550, U. S. A.
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Abstract

A recent paper on quasiinear theory by Klozenberg & Bernstein is commented upon. It is argued that improper treatment of the perturbed electron distribution for damped waves has led to a diffusion-type equation with a negative diffusion coefficient.

Type
Articles
Information
Journal of Plasma Physics , Volume 5 , Issue 1 , January 1971 , pp. 131 - 133
Copyright
Copyright © Cambridge University Press 1971

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References

REFERENCES

Backus, G. 1960 J. Math. Phys. 1, 178. See §8.CrossRefGoogle Scholar
Bernstein, I. B. & Englemann, F. 1966 Phys. Fluids 9, 937. See §7.CrossRefGoogle Scholar
Friedman, A. 1964 Partial Differential Equations of Parabolic Type. New Jersey: Prentice-Hall, Englowood Cliffs.Google Scholar
Klozenberg, J. P. & Bernstein, I. B. 1970 J. Plasma Phys. 4, 595.CrossRefGoogle Scholar
Vahala, G. & Montgomery, D. 1970 J. Plasma Phys. 4, 677.CrossRefGoogle Scholar