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Title: Landau damping of dust acoustic waves in a Lorentzian plasma

Abstract

The Landau damping of dust acoustic waves propagating in a dusty plasma modeled by a Lorentzian (kappa) distribution for electrons and ions, and by a Maxwellian distribution for the dust grains is kinetically investigated. The dust acoustic waves are found in the range of kv{sub d}<<{omega}<<kv{sub i}<<kv{sub e}, where v{sub {alpha}} is the thermal velocity of species {alpha}(=i,e,d). The damping rate is shown to be dependent on the spectral index {kappa} as well as the ratio of ion density to electron. The maximum Landau damping rate is derived and found to be approximately 0.2{sigma}{sub {kappa}}{omega}{sub pd} where {omega}{sub pd} is the dust plasma frequency and {sigma}{sub {kappa}} is a {kappa}-dependent factor, which has the maximum value of 1.33 (for the smallest {kappa}) and reduces to unity as the nonthermal effect disappears.

Authors:
 [1]
  1. BK21 Program Division of Advanced Research and Education in Physics, Department of Physics, Hanyang University, Seoul 133-791 (Korea, Republic of)
Publication Date:
OSTI Identifier:
20974871
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 14; Journal Issue: 3; Other Information: DOI: 10.1063/1.2716661; (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; DISTRIBUTION; DUSTS; ELECTRONS; ION ACOUSTIC WAVES; ION DENSITY; IONS; LANDAU DAMPING; LANGMUIR FREQUENCY; PLASMA; PLASMA DENSITY; SOUND WAVES

Citation Formats

Lee, Myoung-Jae. Landau damping of dust acoustic waves in a Lorentzian plasma. United States: N. p., 2007. Web. doi:10.1063/1.2716661.
Lee, Myoung-Jae. Landau damping of dust acoustic waves in a Lorentzian plasma. United States. doi:10.1063/1.2716661.
Lee, Myoung-Jae. Thu . "Landau damping of dust acoustic waves in a Lorentzian plasma". United States. doi:10.1063/1.2716661.
@article{osti_20974871,
title = {Landau damping of dust acoustic waves in a Lorentzian plasma},
author = {Lee, Myoung-Jae},
abstractNote = {The Landau damping of dust acoustic waves propagating in a dusty plasma modeled by a Lorentzian (kappa) distribution for electrons and ions, and by a Maxwellian distribution for the dust grains is kinetically investigated. The dust acoustic waves are found in the range of kv{sub d}<<{omega}<<kv{sub i}<<kv{sub e}, where v{sub {alpha}} is the thermal velocity of species {alpha}(=i,e,d). The damping rate is shown to be dependent on the spectral index {kappa} as well as the ratio of ion density to electron. The maximum Landau damping rate is derived and found to be approximately 0.2{sigma}{sub {kappa}}{omega}{sub pd} where {omega}{sub pd} is the dust plasma frequency and {sigma}{sub {kappa}} is a {kappa}-dependent factor, which has the maximum value of 1.33 (for the smallest {kappa}) and reduces to unity as the nonthermal effect disappears.},
doi = {10.1063/1.2716661},
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}
}
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