Kappa Distribution Function Effects on Landau Damping in Electrostatic Vlasov Simulation

The non-thermal high-energy electron effects on Langmuir wave-particle interaction are investigated using an initial value approach. A Vlasov-Poisson simulation is employed based on the splitting scheme by Cheng and Knorr (1976). The kappa distribution function is taken as an example of non-thermal...

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Published in:TAO : Terrestrial, atmospheric, and oceanic sciences atmospheric, and oceanic sciences, 2013-04, Vol.24 (2), p.273-281
Main Authors: Chen, Yue-Hung, Nishimura, Yasutaro, Cheng, Chio-Zong
Format: Article
Language:English
Subjects:
Damping
Dispersion
Distribution
Distribution functions
Electron effects
Kappa distribution function
Landau damping
Langmuir waves
Modified plasma dispersion function
Nonlinear Landau damping
Particle interactions
Simulation
Vlasov equilibria
Wave dispersion
Wave-particle interactions
Wavelength
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Nishimura, Yasutaro
Cheng, Chio-Zong
description The non-thermal high-energy electron effects on Langmuir wave-particle interaction are investigated using an initial value approach. A Vlasov-Poisson simulation is employed based on the splitting scheme by Cheng and Knorr (1976). The kappa distribution function is taken as an example of non-thermal electrons. The modification is manifested as an increase in the Landau damping rate and a decrease in the real frequency for a long wavelength limit. A part of the analyses using the modified plasma dispersion function (Summers and Thorne 1991) is reproduced for κ = 2, 3 and 6. The dispersion relation from the initial value simulation and the plasma dispersion function compare favorably. (PACS numbers: 52.35.Fp, 52.35.Sb, 52.65.Ff).
doi_str_mv 10.3319/TAO.2012.10.26.01(SEC)
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subjects Damping
Dispersion
Distribution
Distribution functions
Electron effects
Kappa distribution function
Landau damping
Langmuir waves
Modified plasma dispersion function
Nonlinear Landau damping
Particle interactions
Simulation
Vlasov equilibria
Wave dispersion
Wave-particle interactions
Wavelength
title Kappa Distribution Function Effects on Landau Damping in Electrostatic Vlasov Simulation
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