Linear theory of electron-plasma waves at arbitrary collisionality
Abstract
We report the dynamics of electron-plasma waves is described at arbitrary collisionality by considering the full Coulomb collision operator. The description is based on a Hermite–Laguerre decomposition of the velocity dependence of the electron distribution function. The damping rate, frequency and eigenmode spectrum of electron-plasma waves are found as functions of the collision frequency and wavelength. A comparison is made between the collisionless Landau damping limit, the Lenard–Bernstein and Dougherty collision operators and the electron–ion collision operator, finding large deviations in the damping rates and eigenmode spectra. A purely damped entropy mode, characteristic of a plasma where pitch-angle scattering effects are dominant with respect to collisionless effects, is shown to emerge numerically, and its dispersion relation is analytically derived. It is shown that such a mode is absent when simplified collision operators are used, and that like-particle collisions strongly influence the damping rate of the entropy mode.
- Authors:
-
- Ecole Polytechnique Federale Lausanne (EPFL) (Switzerland); University of Lisbon (Portugal)
- Ecole Polytechnique Federale Lausanne (EPFL) (Switzerland)
- Ecole Polytechnique Federale Lausanne (EPFL) (Switzerland); Politecnico di Milano (Italy)
- Massachusetts Institute of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
- University of Lisbon (Portugal)
- Publication Date:
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); Swiss National Science Foundation (SNSF); Euratom Research and Training Programme; Portuguese Fundação para a Ciência e Tecnologia
- OSTI Identifier:
- 1610181
- Grant/Contract Number:
- FG02-91ER54109; 633053; PD/BD/105979/2014; PD/00505/2012
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Journal of Plasma Physics
- Additional Journal Information:
- Journal Volume: 85; Journal Issue: 2; Journal ID: ISSN 0022-3778
- Publisher:
- Cambridge University Press
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; plasma waves
Citation Formats
Jorge, R., Ricci, P., Brunner, S., Gamba, S., Konovets, V., Loureiro, N. F., Perrone, L. M., and Teixeira, N. Linear theory of electron-plasma waves at arbitrary collisionality. United States: N. p., 2019.
Web. doi:10.1017/s0022377819000266.
Jorge, R., Ricci, P., Brunner, S., Gamba, S., Konovets, V., Loureiro, N. F., Perrone, L. M., & Teixeira, N. Linear theory of electron-plasma waves at arbitrary collisionality. United States. https://doi.org/10.1017/s0022377819000266
Jorge, R., Ricci, P., Brunner, S., Gamba, S., Konovets, V., Loureiro, N. F., Perrone, L. M., and Teixeira, N. 2019.
"Linear theory of electron-plasma waves at arbitrary collisionality". United States. https://doi.org/10.1017/s0022377819000266. https://www.osti.gov/servlets/purl/1610181.
@article{osti_1610181,
title = {Linear theory of electron-plasma waves at arbitrary collisionality},
author = {Jorge, R. and Ricci, P. and Brunner, S. and Gamba, S. and Konovets, V. and Loureiro, N. F. and Perrone, L. M. and Teixeira, N.},
abstractNote = {We report the dynamics of electron-plasma waves is described at arbitrary collisionality by considering the full Coulomb collision operator. The description is based on a Hermite–Laguerre decomposition of the velocity dependence of the electron distribution function. The damping rate, frequency and eigenmode spectrum of electron-plasma waves are found as functions of the collision frequency and wavelength. A comparison is made between the collisionless Landau damping limit, the Lenard–Bernstein and Dougherty collision operators and the electron–ion collision operator, finding large deviations in the damping rates and eigenmode spectra. A purely damped entropy mode, characteristic of a plasma where pitch-angle scattering effects are dominant with respect to collisionless effects, is shown to emerge numerically, and its dispersion relation is analytically derived. It is shown that such a mode is absent when simplified collision operators are used, and that like-particle collisions strongly influence the damping rate of the entropy mode.},
doi = {10.1017/s0022377819000266},
url = {https://www.osti.gov/biblio/1610181},
journal = {Journal of Plasma Physics},
issn = {0022-3778},
number = 2,
volume = 85,
place = {United States},
year = {Mon Apr 08 00:00:00 EDT 2019},
month = {Mon Apr 08 00:00:00 EDT 2019}
}
Web of Science
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