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Analytical description of low-frequency electron density and temperature oscillations

Published online by Cambridge University Press:  13 March 2009

P. Frank ,
M. Beckmann  and
G. Himmel
P. Frank
Affiliation:
Institut für Experimentalphysik II, Ruhr-Universität Bochum, D-44780 Bochum, Germany
M. Beckmann
Affiliation:
Institut für Experimentalphysik II, Ruhr-Universität Bochum, D-44780 Bochum, Germany
G. Himmel
Affiliation:
Institut für Experimentalphysik II, Ruhr-Universität Bochum, D-44780 Bochum, Germany
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Abstract

Low-frequency density and temperature oscillations (ω « νj, ωcj, where νj is the collision frequency with neutrals and ωcj is the cyclotron frequency; j = i, e) observed in magnetized radiofrequency-produced plasmas with electron density and temperature gradients across the magnetic field are analysed using a local two-fluid model. This model incorporates the electron energy equation. The resulting dispersion relation permits study of the parameter dependence of the complex angular wave frequency. Instability is found in the case where the election density and temperature gradients have opposite signs. This instability is classified as a low-frequency drift wave, and the criteria for its onset are obtained.

Type
Research Article
Information
Journal of Plasma Physics , Volume 55 , Issue 1 , February 1996 , pp. 25 - 34
Copyright
Copyright © Cambridge University Press 1996

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References

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