skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Damping and mode-coupling for low-frequency electromagnetic waves in a dusty plasma with dust charge fluctuation

Abstract

Using a kinetic description to analyze wave propagation in dusty plasmas, taking into account the fluctuation of the charge of the dust particles due to inellastic collisions with electrons and ions, we consider the case of propagation of waves exactly parallel to the external magnetic field and Maxwellian distributions for the electrons and ions in the equilibrium, and investigate the phenomena of mode coupling which may occur due to the presence of the dust.

Authors:
;  [1]; ;  [2]
  1. Instituto de Astronomia, Geofisica e Ciencias Atmosfericas, Universidade de Sao Paulo, Rua do Matao 1226, Cidade Universitaria, CEP: 05508-900, Sao Paulo, SP (Brazil)
  2. Instituto de Fisica, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP: 91501-970, Porto Alegre, RS (Brazil)
Publication Date:
OSTI Identifier:
20726821
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 799; Journal Issue: 1; Conference: 4. international conference on the physics of dusty plasmas, Orleans (France), 13-17 Jun 2005; Other Information: DOI: 10.1063/1.2134670; (c) 2005 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; COUPLING; DAMPING; DISTRIBUTION; DUSTS; ELECTROMAGNETIC RADIATION; ELECTRON COLLISIONS; ELECTRONS; EQUILIBRIUM; FLUCTUATIONS; ION COLLISIONS; IONS; MAGNETIC FIELDS; PARTICLES; PLASMA; WAVE PROPAGATION

Citation Formats

Juli, M.C. de, Jatenco-Pereira, V., Schneider, R.S., and Ziebell, L.F.. Damping and mode-coupling for low-frequency electromagnetic waves in a dusty plasma with dust charge fluctuation. United States: N. p., 2005. Web. doi:10.1063/1.2134670.
Juli, M.C. de, Jatenco-Pereira, V., Schneider, R.S., & Ziebell, L.F.. Damping and mode-coupling for low-frequency electromagnetic waves in a dusty plasma with dust charge fluctuation. United States. doi:10.1063/1.2134670.
Juli, M.C. de, Jatenco-Pereira, V., Schneider, R.S., and Ziebell, L.F.. Mon . "Damping and mode-coupling for low-frequency electromagnetic waves in a dusty plasma with dust charge fluctuation". United States. doi:10.1063/1.2134670.
@article{osti_20726821,
title = {Damping and mode-coupling for low-frequency electromagnetic waves in a dusty plasma with dust charge fluctuation},
author = {Juli, M.C. de and Jatenco-Pereira, V. and Schneider, R.S. and Ziebell, L.F.},
abstractNote = {Using a kinetic description to analyze wave propagation in dusty plasmas, taking into account the fluctuation of the charge of the dust particles due to inellastic collisions with electrons and ions, we consider the case of propagation of waves exactly parallel to the external magnetic field and Maxwellian distributions for the electrons and ions in the equilibrium, and investigate the phenomena of mode coupling which may occur due to the presence of the dust.},
doi = {10.1063/1.2134670},
journal = {AIP Conference Proceedings},
number = 1,
volume = 799,
place = {United States},
year = {Mon Oct 31 00:00:00 EST 2005},
month = {Mon Oct 31 00:00:00 EST 2005}
}
  • The properties of low intensity dust ion acoustic shock waves are studied in a charge varying dusty plasma with nonextensive electrons. Owing to the departure from the Maxwellian electron distribution to a nonextensive one, the modified electrostatic charging of a spherical dust particle in plasma with ion streaming speed is considered. Based on the weakly nonlinear analysis, a new relationship between the low intensity localized disturbances and nonextensive electrons is derived. It is found that both strength and steepness of shock structures arise as the electrons evolve far from their thermodynamic equilibrium in such plasma with parameter ranges corresponding tomore » Saturn's rings. It is also shown that the ion temperature and population of electrons reduce the possibility of the formation of the shock profile.« 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.
  • A kinetic description is used to analyze wave propagation in dusty plasmas, taking into account the fluctuation of the charge of the dust particles due to inelastic collisions with electrons and ions. The case of propagation of waves exactly parallel to the external magnetic field and Maxwellian distributions for the electrons and ions in the equilibrium is considered, and a parametric analysis of the dispersion relation is performed. The investigation emphasizes particularly the effects of dust density, radius of dust particles, ion temperature, ratio between electron and ion temperatures, ion density, and ambient magnetic field, on the solutions of themore » dispersion relation. The analysis shows the possibility of occurrence of coupling between waves in the whistler branch and waves in the branch of circularly polarized waves, in the presence of the dust particles.« less
  • This paper studies the effects of the presence of dust particles with variable charge, in fully ionized, homogeneous, magnetized plasma of electrons and ions, with the electrons and ions described by bi-Maxwellian distributions in the equilibrium. The dispersion relation and the absorption rate are obtained for low frequency waves, with frequencies much lower than the ion cyclotron frequency. Two branches are obtained, identified as the whistler branch and the branch of circularly polarized waves, featuring damping due to the Landau damping process and to the collisional charging of the dust particles. The effects of the anisotropy of temperature on themore » damping rate of low frequency waves, and on the mode coupling which was demonstrated to occur in the isotropic situation, are numerically investigated. The results obtained show that in the anisotropic case the point of mode coupling is displaced to different values of dust density, and that a new point of mode coupling may appear from the effect of the temperature anisotropy.« less
  • 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.