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Title: Kinetic Alfven waves in a homogeneous dusty magnetoplasma with dust charge fluctuation effects

Abstract

Kinetic Alfven waves with finite Larmor radius effects have been examined rigorously in a uniform dusty plasma in the presence of an external/ambient magnetic field. Two-potential theory has been applied for these electromagnetic waves and the dispersion relation is derived which shows a cutoff frequency at the dust-lower-hybrid frequency due to the hybrid motion of magnetized ions and cold and unmagnetized dust dynamics. The dust charge fluctuation effect was analyzed for finding the damping of the electromagnetic kinetic Alfven waves, which arises on account of the electrostatic parallel component of the waves. The dust charge fluctuation damping is seen to be contributed dominantly by the perpendicular motion of electrons and ions in the dusty magnetoplasma.

Authors:
; ; ; ;  [1];  [2];  [2];  [2];  [2]
  1. Department of Physics, Government College University, Lahore 54000 (Pakistan)
  2. (Pakistan)
Publication Date:
OSTI Identifier:
20974864
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 14; Journal Issue: 3; Other Information: DOI: 10.1063/1.2710457; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALFVEN WAVES; DAMPING; DISPERSION RELATIONS; DUSTS; ELECTROMAGNETIC RADIATION; ELECTRONS; FLUCTUATIONS; IONS; LARMOR RADIUS; LOWER HYBRID CURRENT DRIVE; LOWER HYBRID HEATING; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS; PLASMA; PLASMA WAVES; POTENTIALS

Citation Formats

Zubia, K., Rubab, N., Shah, H. A., Salimullah, M., Murtaza, G., Department of Physics, Government College University, Lahore 54000, Pakistan and Salam Chair in Physics, Government College University, Lahore 54000, Department of Physics, Government College University, Lahore 54000, Department of Physics, Government College University, Lahore 54000, Pakistan and Salam Chair in Physics, Government College University, Lahore 54000, and Salam Chair in Physics, Government College University, Lahore 54000. Kinetic Alfven waves in a homogeneous dusty magnetoplasma with dust charge fluctuation effects. United States: N. p., 2007. Web. doi:10.1063/1.2710457.
Zubia, K., Rubab, N., Shah, H. A., Salimullah, M., Murtaza, G., Department of Physics, Government College University, Lahore 54000, Pakistan and Salam Chair in Physics, Government College University, Lahore 54000, Department of Physics, Government College University, Lahore 54000, Department of Physics, Government College University, Lahore 54000, Pakistan and Salam Chair in Physics, Government College University, Lahore 54000, & Salam Chair in Physics, Government College University, Lahore 54000. Kinetic Alfven waves in a homogeneous dusty magnetoplasma with dust charge fluctuation effects. United States. doi:10.1063/1.2710457.
Zubia, K., Rubab, N., Shah, H. A., Salimullah, M., Murtaza, G., Department of Physics, Government College University, Lahore 54000, Pakistan and Salam Chair in Physics, Government College University, Lahore 54000, Department of Physics, Government College University, Lahore 54000, Department of Physics, Government College University, Lahore 54000, Pakistan and Salam Chair in Physics, Government College University, Lahore 54000, and Salam Chair in Physics, Government College University, Lahore 54000. Thu . "Kinetic Alfven waves in a homogeneous dusty magnetoplasma with dust charge fluctuation effects". United States. doi:10.1063/1.2710457.
@article{osti_20974864,
title = {Kinetic Alfven waves in a homogeneous dusty magnetoplasma with dust charge fluctuation effects},
author = {Zubia, K. and Rubab, N. and Shah, H. A. and Salimullah, M. and Murtaza, G. and Department of Physics, Government College University, Lahore 54000, Pakistan and Salam Chair in Physics, Government College University, Lahore 54000 and Department of Physics, Government College University, Lahore 54000 and Department of Physics, Government College University, Lahore 54000, Pakistan and Salam Chair in Physics, Government College University, Lahore 54000 and Salam Chair in Physics, Government College University, Lahore 54000},
abstractNote = {Kinetic Alfven waves with finite Larmor radius effects have been examined rigorously in a uniform dusty plasma in the presence of an external/ambient magnetic field. Two-potential theory has been applied for these electromagnetic waves and the dispersion relation is derived which shows a cutoff frequency at the dust-lower-hybrid frequency due to the hybrid motion of magnetized ions and cold and unmagnetized dust dynamics. The dust charge fluctuation effect was analyzed for finding the damping of the electromagnetic kinetic Alfven waves, which arises on account of the electrostatic parallel component of the waves. The dust charge fluctuation damping is seen to be contributed dominantly by the perpendicular motion of electrons and ions in the dusty magnetoplasma.},
doi = {10.1063/1.2710457},
journal = {Physics of Plasmas},
number = 3,
volume = 14,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}
  • Using a completely kinetic description to analyze wave propagation in dusty plasmas, the case of propagation of waves exactly parallel to the external magnetic field and Maxwellian distributions for electrons and ions in the equilibrium is considered. A model for the charging process of dust particles which depends on the frequency of inelastic collisions between dust particles and electrons and ions is used. The dispersion relation and damping rates for Alfven waves are obtained. For the numerical solutions, the average value of the inelastic collision frequency is used as an approximation. The results show that the presence of dust particlesmore » with variable charge in the plasma produces significant additional damping of the Alfven wave. A novel process of mode coupling of low-frequency waves is demonstrated to occur due to the presence of dust particles.« less
  • A rigorous theoretical investigation is made for the low frequency electrostatic waves in a cylindrically bounded magnetized dusty plasmas with nonadiabatic dust charge variation, and the dispersion relation for the low frequency modes is derived. The combined effects of the cylindrical boundary, the external magnetized field, the nonadiabatic dust charge fluctuation, the nonthermally distributed ions and the ratio of electron to ion density on the low frequency waves are studied in great detail. It is shown that the mentioned effects have a strong influence on the dispersion properties of the low frequency modes.
  • Dust acoustic solitary waves in a magnetized dusty plasma are studied taking into account the effect of dust size and dust charge variations. Using the analytical and numerical results the influence of different plasma parameters on dust acoustic solitary waves are examined. It is observed that the dust size distribution and dust charge variation has significant contribution on the characteristics of dust acoustic solitary waves.
  • Dust acoustic solitary waves in a magnetized dusty plasma are studied taking into account the effect of dust size and dust charge variations. Using the analytical and numerical results the influence of different plasma parameters on dust acoustic solitary waves are examined. It is observed that the dust size distribution and dust charge variation have significant contributions on the characteristics of dust acoustic solitary waves.
  • The propagation of multidimensional nonlinear dust acoustic shock waves in inhomogeneous dusty plasmas due to spatial gradients of dust charge and plasma densities is investigated. A modified variable coefficients Korteweg-de Vries Burgers equation is derived with the nonadiabatic dust charge fluctuation, the nonthermally distributed ions, dust-neutral collision, and the external magnetic field. The numerical results show that the inhomogeneity, the nonthermal ions and the nonadiabatic dust charge fluctuation have strong influence on the nonlinear properties of dust acoustic shock waves.