Linear theory of electron-plasma waves at arbitrary collisionality
Journal Article
·
· Journal of Plasma Physics
- Ecole Polytechnique Federale Lausanne (EPFL) (Switzerland); University of Lisbon (Portugal); OSTI
- 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)
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.
- Research Organization:
- Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Organization:
- Euratom Research and Training Programme; Portuguese Fundação para a Ciência e Tecnologia; Swiss National Science Foundation; USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Grant/Contract Number:
- FG02-91ER54109
- OSTI ID:
- 1610181
- Journal Information:
- Journal of Plasma Physics, Journal Name: Journal of Plasma Physics Journal Issue: 2 Vol. 85; ISSN 0022-3778
- Publisher:
- Cambridge University PressCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Nonlinear gyrokinetic Coulomb collision operator
|
journal | November 2019 |
An introductory guide to fluid models with anisotropic temperatures. Part 2. Kinetic theory, Padé approximants and Landau fluid closures
|
journal | December 2019 |
Electron skin depth in low density plasmas
|
journal | January 2020 |
Shocks and phase space vortices driven by a density jump between two clouds of electrons and protons
|
journal | December 2019 |
Similar Records
Linear Theory of Electron-Plasma Waves at Arbitrary Collisionality
Theory of the Drift-Wave Instability at Arbitrary Collisionality
Theory of the Drift-Wave Instability at Arbitrary Collisionality
Dataset
·
Mon Dec 03 23:00:00 EST 2018
·
OSTI ID:1880321
Theory of the Drift-Wave Instability at Arbitrary Collisionality
Dataset
·
Thu Jan 03 23:00:00 EST 2019
·
OSTI ID:1880563
Theory of the Drift-Wave Instability at Arbitrary Collisionality
Journal Article
·
Thu Oct 18 20:00:00 EDT 2018
· Physical Review Letters
·
OSTI ID:1610186