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Title: The influence of dust particles on electromagnetic ion cyclotron waves in a bi-Lorentzian plasma

Abstract

The influence of dust particles on electromagnetic ion cyclotron (EMIC) waves, propagating parallel to the magnetic field, in a plasma where the hot ions are modelled by a bi-Lorentzian or Kappa distribution has been studied. The electrons and dust particles have been treated as cold. Expressions for the dispersion relations and growth/damping rates in both high- and low-{beta} plasmas have been derived. For the low-{beta} case temperature anisotropy is the source of instability in an electron{endash}ion plasma. This instability is strongly influenced by the temperature anisotropy of the hot ions and the charge and density of the dust particles; the instability increases with these parameters. However, in high-{beta} plasmas, the instability is driven by the dust. The growth rate increases with the charge on the dust; but with increasing dust densities the EMIC wave propagates almost freely. {copyright} {ital 1997 American Institute of Physics.}

Authors:
; ; ;  [1];  [2]
  1. School of Pure and Applied Physics, Mahatma Gandhi University, Priyadarshini Hills, Kottayam-686 560, Kerala (India)
  2. Department of Physics, University of Kerala, Kariavattom-695 581, Trivandrum (India)
Publication Date:
OSTI Identifier:
542585
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 4; Journal Issue: 10; Other Information: PBD: Oct 1997
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; PLASMA IMPURITIES; PLASMA WAVES; DISPERSION RELATIONS; PLASMA DENSITY; DUSTS; LOW-BETA PLASMA; HIGH-BETA PLASMA; SOLAR WIND; DISTRIBUTION FUNCTIONS; INSTABILITY GROWTH RATES

Citation Formats

Venugopal, C, Varughese, J K, Antony, S, Anilkumar, C P, and Renuka, G. The influence of dust particles on electromagnetic ion cyclotron waves in a bi-Lorentzian plasma. United States: N. p., 1997. Web. doi:10.1063/1.872241.
Venugopal, C, Varughese, J K, Antony, S, Anilkumar, C P, & Renuka, G. The influence of dust particles on electromagnetic ion cyclotron waves in a bi-Lorentzian plasma. United States. https://doi.org/10.1063/1.872241
Venugopal, C, Varughese, J K, Antony, S, Anilkumar, C P, and Renuka, G. 1997. "The influence of dust particles on electromagnetic ion cyclotron waves in a bi-Lorentzian plasma". United States. https://doi.org/10.1063/1.872241.
@article{osti_542585,
title = {The influence of dust particles on electromagnetic ion cyclotron waves in a bi-Lorentzian plasma},
author = {Venugopal, C and Varughese, J K and Antony, S and Anilkumar, C P and Renuka, G},
abstractNote = {The influence of dust particles on electromagnetic ion cyclotron (EMIC) waves, propagating parallel to the magnetic field, in a plasma where the hot ions are modelled by a bi-Lorentzian or Kappa distribution has been studied. The electrons and dust particles have been treated as cold. Expressions for the dispersion relations and growth/damping rates in both high- and low-{beta} plasmas have been derived. For the low-{beta} case temperature anisotropy is the source of instability in an electron{endash}ion plasma. This instability is strongly influenced by the temperature anisotropy of the hot ions and the charge and density of the dust particles; the instability increases with these parameters. However, in high-{beta} plasmas, the instability is driven by the dust. The growth rate increases with the charge on the dust; but with increasing dust densities the EMIC wave propagates almost freely. {copyright} {ital 1997 American Institute of Physics.}},
doi = {10.1063/1.872241},
url = {https://www.osti.gov/biblio/542585}, journal = {Physics of Plasmas},
number = 10,
volume = 4,
place = {United States},
year = {Wed Oct 01 00:00:00 EDT 1997},
month = {Wed Oct 01 00:00:00 EDT 1997}
}