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Excitation of convective cells by drift-like electromagnetic modes in a magnetized dusty plasma

Published online by Cambridge University Press:  04 November 2004

P. K. SHUKLA  and
L. STENFLO
P. K. SHUKLA
Affiliation:
Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany, and Department of Physics, Umeå University, SE-90187 Umeå, Sweden (ps@tp4.ruhr-uni-bochum.de)
L. STENFLO
Affiliation:
Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany, and Department of Physics, Umeå University, SE-90187 Umeå, Sweden (ps@tp4.ruhr-uni-bochum.de)
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Abstract

We present a pair of coupled equations that shows the nonlinear coupling between a newly discovered low-frequency dispersive electromagnetic mode and flute-like electrostatic convective cells in a non-uniform dusty magnetoplasma. From the coupled mode equations we obtain a nonlinear dispersion relation, which predicts efficient excitation of convective cells at the expense of the dispersive electromagnetic wave energy. The relevance of our investigation to the transfer of energy from short-scale electromagnetic waves to long-scale convective cells in tokamak plasmas is pointed out.

Type
Letter to the Editor
Information
Journal of Plasma Physics , Volume 70 , Issue 6 , December 2004 , pp. 645 - 650
Copyright
2004 Cambridge University Press

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