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Title: Mode-coupling of low-frequency electromagnetic waves in dusty plasmas with temperature anisotropy

Abstract

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 the 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.

Authors:
; ; ;  [1];  [2];  [2]
  1. Centro de Radio-Astronomia e Astrofisica Mackenzie, CRAAM, Universidade Presbiteriana Mackenzie, Rua da Consolacao 896, CEP: 01302-907, Sao Paulo, SP (Brazil)
  2. (Brazil)
Publication Date:
OSTI Identifier:
20974819
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 14; Journal Issue: 2; Other Information: DOI: 10.1063/1.2435704; (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; ABSORPTION; ANISOTROPY; COLLISIONS; CYCLOTRON FREQUENCY; DISPERSION RELATIONS; ELECTRON TEMPERATURE; ELECTRONS; ION TEMPERATURE; IONS; LANDAU DAMPING; PARTICLES; PLASMA; PLASMA DENSITY; WHISTLERS

Citation Formats

Juli, M. C. de, Schneider, R. S., Ziebell, L. F., Gaelzer, R., Instituto de Fisica, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP: 91501-970, Porto Alegre, RS, and Instituto de Fisica e Matematica, Universidade Federal de Pelotas, Caixa Postal 354, Campus UFPel, CEP: 96010-900, Pelotas, RS. Mode-coupling of low-frequency electromagnetic waves in dusty plasmas with temperature anisotropy. United States: N. p., 2007. Web. doi:10.1063/1.2435704.
Juli, M. C. de, Schneider, R. S., Ziebell, L. F., Gaelzer, R., Instituto de Fisica, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP: 91501-970, Porto Alegre, RS, & Instituto de Fisica e Matematica, Universidade Federal de Pelotas, Caixa Postal 354, Campus UFPel, CEP: 96010-900, Pelotas, RS. Mode-coupling of low-frequency electromagnetic waves in dusty plasmas with temperature anisotropy. United States. doi:10.1063/1.2435704.
Juli, M. C. de, Schneider, R. S., Ziebell, L. F., Gaelzer, R., Instituto de Fisica, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP: 91501-970, Porto Alegre, RS, and Instituto de Fisica e Matematica, Universidade Federal de Pelotas, Caixa Postal 354, Campus UFPel, CEP: 96010-900, Pelotas, RS. Thu . "Mode-coupling of low-frequency electromagnetic waves in dusty plasmas with temperature anisotropy". United States. doi:10.1063/1.2435704.
@article{osti_20974819,
title = {Mode-coupling of low-frequency electromagnetic waves in dusty plasmas with temperature anisotropy},
author = {Juli, M. C. de and Schneider, R. S. and Ziebell, L. F. and Gaelzer, R. and Instituto de Fisica, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP: 91501-970, Porto Alegre, RS and Instituto de Fisica e Matematica, Universidade Federal de Pelotas, Caixa Postal 354, Campus UFPel, CEP: 96010-900, Pelotas, RS},
abstractNote = {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 the 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.},
doi = {10.1063/1.2435704},
journal = {Physics of Plasmas},
number = 2,
volume = 14,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}