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Proton-temperature-anisotropy-driven magnetic fields in plasmas with cold and relativistically hot electrons

Published online by Cambridge University Press:  08 October 2009

NITIN SHUKLA  and
P. K. SHUKLA
NITIN SHUKLA
Affiliation:
Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany ([email protected], [email protected])
P. K. SHUKLA
Affiliation:
Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany ([email protected], [email protected]) School of Physics, University of KwaZulu-Natal, Durban 4000, South Africa
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Abstract

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We present a dispersion relation for a plane-polarized electromagnetic wave in plasmas composed of cold electrons, relativistically hot electrons and bi-Maxwellian protons. It is shown that the free energy in proton-temperature anisotropy drives purely growing electromagnetic modes in our three-component plasma. Expressions for the growth rates and thresholds of instabilities are presented. The present results are relevant for explaining the origin of spontaneously generated magnetic fields in laboratory and astrophysical plasmas.

Type
Letter to the Editor
Information
Journal of Plasma Physics , Volume 76 , Issue 1 , February 2010 , pp. 1 - 5
Copyright
Copyright © Cambridge University Press 2009

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