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Title: Collisional damping rates for electron plasma waves reassessed

Abstract

Collisional damping of electron plasma waves, the primary damping for high phase velocity waves, is proportional to the electron-ion collision rate, ν ei,th. Here in this work, it is shown that the damping rate normalized to ν ei,th depends on the charge state, Z, on the magnitude of ν ei,th and the wave number k in contrast with the commonly used damping rate in plasma wave research. Only for weak collision rates in low-Z plasmas for which the electron self-collision rate is comparable to the electron-ion collision rate is the damping rate given by the commonly accepted value. The result presented here corrects the result presented in textbooks at least as early as 1973. Lastly, the complete linear theory requires the inclusion of both electron-ion pitch-angle and electron-electron scattering, which itself contains contributions to both pitch-angle scattering and thermalization.

Authors:
 [1];  [2];  [3];  [3];  [2]
  1. Rensselaer Polytechnic Institute, Troy, NY (United States). Department of Mathematical Sciences
  2. Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne (Switzerland)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1409933
Alternate Identifier(s):
OSTI ID: 1399290
Report Number(s):
LLNL-JRNL-703319
Journal ID: ISSN 2470-0045; TRN: US1703321
Grant/Contract Number:  
AC52-07NA27344; 12-ERD-061; 15-ERD-038
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 96; Journal Issue: 4; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Banks, J. W., Brunner, S., Berger, R. L., Arrighi, W. J., and Tran, T. M. Collisional damping rates for electron plasma waves reassessed. United States: N. p., 2017. Web. doi:10.1103/PhysRevE.96.043208.
Banks, J. W., Brunner, S., Berger, R. L., Arrighi, W. J., & Tran, T. M. Collisional damping rates for electron plasma waves reassessed. United States. doi:10.1103/PhysRevE.96.043208.
Banks, J. W., Brunner, S., Berger, R. L., Arrighi, W. J., and Tran, T. M. Fri . "Collisional damping rates for electron plasma waves reassessed". United States. doi:10.1103/PhysRevE.96.043208. https://www.osti.gov/servlets/purl/1409933.
@article{osti_1409933,
title = {Collisional damping rates for electron plasma waves reassessed},
author = {Banks, J. W. and Brunner, S. and Berger, R. L. and Arrighi, W. J. and Tran, T. M.},
abstractNote = {Collisional damping of electron plasma waves, the primary damping for high phase velocity waves, is proportional to the electron-ion collision rate, νei,th. Here in this work, it is shown that the damping rate normalized to νei,th depends on the charge state, Z, on the magnitude of νei,th and the wave number k in contrast with the commonly used damping rate in plasma wave research. Only for weak collision rates in low-Z plasmas for which the electron self-collision rate is comparable to the electron-ion collision rate is the damping rate given by the commonly accepted value. The result presented here corrects the result presented in textbooks at least as early as 1973. Lastly, the complete linear theory requires the inclusion of both electron-ion pitch-angle and electron-electron scattering, which itself contains contributions to both pitch-angle scattering and thermalization.},
doi = {10.1103/PhysRevE.96.043208},
journal = {Physical Review E},
number = 4,
volume = 96,
place = {United States},
year = {2017},
month = {10}
}

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