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Title: Vlasov simulations of electron-ion collision effects on damping of electron plasma waves

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4943194· OSTI ID:1829015
 [1];  [2];  [3];  [2]
  1. Rensselaer Polytechnic Inst., Troy, NY (United States)
  2. Ecole Polytechnique Federale Lausanne (Switzerland)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Collisional effects can play an essential role in the dynamics of plasma waves by setting a minimum damping rate and by interfering with wave-particle resonances. Kinetic simulations of the effects of electron-ion pitch angle scattering on Electron Plasma Waves (EPWs) are presented here. In particular, the effects of such collisions on the frequency and damping of small-amplitude EPWs for a range of collision rates and wave phase velocities are computed and compared with theory. Both the Vlasov simulations and linear kinetic theory find the direct contribution of electron-ion collisions to wave damping significantly reduced from that obtained through linearized fluid theory. To our knowledge, this simple result has not been published before. Simulations have been carried out using a grid-based (Vlasov) approach, based on a high-order conservative finite difference method for discretizing the Fokker-Planck equation describing the evolution of the electron distribution function. Details of the implementation of the collision operator within this framework are presented. Such a grid-based approach, which is not subject to numerical noise, is of particular interest for the accurate measurements of the wave damping rates.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC52-07NA27344; 12-ERD-061; 15-ERD-038
OSTI ID:
1829015
Alternate ID(s):
OSTI ID: 1349320
Report Number(s):
LLNL-JRNL-669228; 790422; TRN: US2216343
Journal Information:
Physics of Plasmas, Vol. 23, Issue 3; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

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Cited By (7)

Linear Theory of Electron-Plasma Waves at Arbitrary Collisionality text January 2018
Kinetic Simulation of Collisional Magnetized Plasmas with Semi-implicit Time Integration journal May 2018
Kinetic Simulation of Collisional Magnetized Plasmas with Semi-Implicit Time Integration preprint January 2017
Plasma waves excitation by a short pulse of focused laser radiation journal August 2018
Coherent phase space structures in a 1D electrostatic plasma using particle-in-cell and Vlasov simulations: A comparative study journal September 2018
Linear theory of electron-plasma waves at arbitrary collisionality journal April 2019
Test cases for grid-based direct kinetic modeling of plasma flows journal June 2018