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Collisional drift waves in the presences of coherent ion acoustic or Langmuir waves

Published online by Cambridge University Press:  13 March 2009

M. Dobrowolny  and
P. Negrini
M. Dobrowolny
Affiliation:
CNEN, Laboratori Gas Ionizzati, Frascati, Roma
P. Negrini
Affiliation:
CNEN, Laboratori Gas Ionizzati, Frascati, Roma
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Abstract

The dispersion properties of drift waves in a low β weakly collisional plasma, in the presence of ion acoustic or Langmuir waves parallel to magnetic lines, are investigated. It is shown that the non-linear interaction with an ion acoustic wave mainly leads to a shift of the drift wave spectrum towards lower frequencies (and only under very particular conditions affects the stability of the drift wave). The interaction with a Langmuir wave, on the contrary, yields a contribution to the imaginary part of the frequency. The conditions under which this stabilizes unstable drift modes are derived and discussed.

Type
Research Article
Information
Journal of Plasma Physics , Volume 6 , Issue 3 , December 1971 , pp. 527 - 540
Copyright
Copyright © Cambridge University Press 1971

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References

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