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The mean electromotive force generated by random hydromagnetic waves in a collisionless plasma

Published online by Cambridge University Press:  13 March 2009

Tomikazu Namikawa ,
Hiromitsu Hamabata  and
Yasusi Hosoya
Tomikazu Namikawa
Affiliation:
Department of Physics, Faculty of Science, Osaka City University, Osaka, Japan
Hiromitsu Hamabata
Affiliation:
Department of Physics, Faculty of Science, Osaka City University, Osaka, Japan
Yasusi Hosoya
Affiliation:
Department of Physics, Faculty of Science, Osaka City University, Osaka, Japan
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Abstract

The mean electromotive force generated by random hydromagnetic waves is calculated by using Fourier analysis methods for the cases of an incompressible Hall plasma and a compressible plasma with finite β. It is shown that in the case of a Hall plasma the α effect can exist in the interaction between two waves which propagate in opposite directions and have different phase velocities and several new β–terms are produced by the Hall effect, while in the case of a compressible plasma the α–effect can exist only in the interaction between the Alfvén mode and the fast or slow magneto-acoustic mode, and not between the fast and slow magneto-acoustic modes. The results are discussed in the context of the substorms in the earth's magnetosphere.

Type
Research Article
Information
Journal of Plasma Physics , Volume 28 , Issue 2 , October 1982 , pp. 299 - 307
Copyright
Copyright © Cambridge University Press 1982

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References

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