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Low-frequency temperature-dependent plasma discharge instabilities in the presence of external constant electric and magnetic fields

Published online by Cambridge University Press:  01 February 2008

A. R. NIKNAM  and
B. SHOKRI
A. R. NIKNAM
Affiliation:
Laser-Plasma Research Institute of Shahid Beheshti University, Tehran, Iran
B. SHOKRI
Affiliation:
Physics Department and Laser-Plasma Research Institute of Shahid Beheshti University, Tehran, Iran Institute for Studies in Theoretical Physics and Mathematics, PO Box 19395-5531, Tehran, Iran ([email protected])
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Abstract

By calculating the dielectric permittivity of a magnetoactive plasma discharge in the presence of an external electric field, low-frequency instabilities resulting from the dependency of the electron-neutral collision frequency, electron-ion recombination coefficient and ionization frequency on the electron temperature are investigated. Furthermore, it is shown that some of these instabilities depend on the sign change of the derivative of the kinetic coefficients with respect to the electron temperature. Finally, it is shown how frequency spectra and the development of instabilities are changed by increasing the strength of the external magnetic field.

Type
Papers
Information
Journal of Plasma Physics , Volume 74 , Issue 1 , February 2008 , pp. 35 - 46
Copyright
Copyright © Cambridge University Press 2007

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