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Title: The frequency and damping of ion acoustic waves in collisional and collisionless two-species plasma

Abstract

The dispersion properties of ion acoustic waves (IAW) are sensitive to the strength of ion-ion collisions in multi-species plasma in which the different species usually have differing charge-to-mass ratios. The modification of the frequency and damping of the fast and slow acoustic modes in a plasma composed of light (low Z) and heavy (high Z) ions is considered. In the fluid limit where the light ion scattering mean free path, {lambda}{sub th} is smaller than the acoustic wavelength, {lambda} = 2{pi}/k, the interspecies friction and heat flow carried by the light ions scattering from the heavy ions causes the damping. In the collisionless limit, k{lambda}{sub lh} >> 1, Landau damping by the light ions provides the dissipation. In the intermediate regime when k{lambda}{sub lh} {approx} 1, the damping is at least as large as the sum of the collisional and Landau damping.

Authors:
;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
15011581
Report Number(s):
UCRL-JRNL-205400
Journal ID: ISSN 1070-664X; TRN: US0501297
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 12; Journal Issue: 3; Other Information: Journal published February 10, 2005; PBD: 15 Jul 2004; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACOUSTICS; DAMPING; FRICTION; HEAT FLUX; HEAVY IONS; ION ACOUSTIC WAVES; ION-ION COLLISIONS; LANDAU DAMPING; LIGHT IONS; MEAN FREE PATH; MODIFICATIONS; PLASMA; SCATTERING

Citation Formats

Berger, R L, and Valeo, E J. The frequency and damping of ion acoustic waves in collisional and collisionless two-species plasma. United States: N. p., 2004. Web. doi:10.1063/1.1855923.
Berger, R L, & Valeo, E J. The frequency and damping of ion acoustic waves in collisional and collisionless two-species plasma. United States. https://doi.org/10.1063/1.1855923
Berger, R L, and Valeo, E J. 2004. "The frequency and damping of ion acoustic waves in collisional and collisionless two-species plasma". United States. https://doi.org/10.1063/1.1855923. https://www.osti.gov/servlets/purl/15011581.
@article{osti_15011581,
title = {The frequency and damping of ion acoustic waves in collisional and collisionless two-species plasma},
author = {Berger, R L and Valeo, E J},
abstractNote = {The dispersion properties of ion acoustic waves (IAW) are sensitive to the strength of ion-ion collisions in multi-species plasma in which the different species usually have differing charge-to-mass ratios. The modification of the frequency and damping of the fast and slow acoustic modes in a plasma composed of light (low Z) and heavy (high Z) ions is considered. In the fluid limit where the light ion scattering mean free path, {lambda}{sub th} is smaller than the acoustic wavelength, {lambda} = 2{pi}/k, the interspecies friction and heat flow carried by the light ions scattering from the heavy ions causes the damping. In the collisionless limit, k{lambda}{sub lh} >> 1, Landau damping by the light ions provides the dissipation. In the intermediate regime when k{lambda}{sub lh} {approx} 1, the damping is at least as large as the sum of the collisional and Landau damping.},
doi = {10.1063/1.1855923},
url = {https://www.osti.gov/biblio/15011581}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 3,
volume = 12,
place = {United States},
year = {Thu Jul 15 00:00:00 EDT 2004},
month = {Thu Jul 15 00:00:00 EDT 2004}
}

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