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Dust-lower-hybrid instability in the presence of dust charge fluctuations in a magnetized dusty plasma

Published online by Cambridge University Press:  07 February 2005

M. SALIMULLAH ,
H. NITTA ,
M. K. ISLAM  and
P. K. SHUKLA
M. SALIMULLAH
Affiliation:
Department of Physics, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh ([email protected])
H. NITTA
Affiliation:
Department of Physics, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan
M. K. ISLAM
Affiliation:
Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
P. K. SHUKLA
Affiliation:
Institut für Theoretische Physik IV, Fakaltät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany
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Abstract

The growth and damping of the low-frequency electrostatic dust-lower-hybrid (DLH) wave have been examined in the presence of dust charge fluctuations in a uniform magnetized dusty plasma. To obtain the dust charge fluctuation effects, the charging currents of electrons and ions to a spherical dust grain in a uniform magnetized dusty plasma have been calculated under the orbit-limited motion approximation. It is found that the external magnetic field reduces the charging currents, thereby reducing the dust charge fluctuation damping of a low-frequency electrostatic wave in a dusty plasma. However, for sufficiently low-frequency DLH wave having a finite parallel wave number, the thermal electrons may give rise to an instability of the DLH wave.

Type
Papers
Information
Journal of Plasma Physics , Volume 71 , Issue 2 , April 2005 , pp. 157 - 162
Copyright
2005 Cambridge University Press

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