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

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 th} >> 1, Landau damping by the light ions provides the dissipation. In the intermediate regime when k{lambda}{sub th} {approx} 1, the damping is at least as large as the sum of the collisional and Landau damping.

Authors:
;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC) (US)
OSTI Identifier:
834521
Report Number(s):
PPPL-3997
TRN: US0407235
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 18 Aug 2004
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; COLLISIONS; ION ACCOUSTIC WAVES; LASER-PLASMA INTERACTIONS

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:10.2172/834521.
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/10.2172/834521
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/10.2172/834521. https://www.osti.gov/servlets/purl/834521.
@article{osti_834521,
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 th} >> 1, Landau damping by the light ions provides the dissipation. In the intermediate regime when k{lambda}{sub th} {approx} 1, the damping is at least as large as the sum of the collisional and Landau damping.},
doi = {10.2172/834521},
url = {https://www.osti.gov/biblio/834521}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Aug 18 00:00:00 EDT 2004},
month = {Wed Aug 18 00:00:00 EDT 2004}
}