Collisional damping rates for electron plasma waves reassessed
- Rensselaer Polytechnic Institute, Troy, NY (United States). Department of Mathematical Sciences
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne (Switzerland)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-07NA27344; 12-ERD-061; 15-ERD-038
- OSTI ID:
- 1409933
- Alternate ID(s):
- OSTI ID: 1399290
- Report Number(s):
- LLNL-JRNL-703319; TRN: US1703321
- Journal Information:
- Physical Review E, Vol. 96, Issue 4; ISSN 2470-0045
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Spatial propagation and damping of ordinary electromagnetic mode
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journal | August 2018 |
Theory of the Drift-Wave Instability at Arbitrary Collisionality | text | January 2018 |
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