Landau damping of electrostatic modes in nonthermal plasmas

The dispersion relation (DR) and Landau damping of basic electrostatic modes propagating in an electron-ion plasma modeled by a Cairn's distribution with a spectral index α are kinetically investigated. In the high-frequency range, i.e., ω / k > v t e , the DR and Landau damping of the elect...

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Bibliographic Details
Published in:Physics of plasmas 2017-10, Vol.24 (10)
Main Authors: Hadi, Fazli, Ata-ur-Rahman, Qamar, Anisa
Format: Article
Language:English
Subjects:
Ion acoustic waves
Landau damping
Langmuir waves
Phase velocity
Plasma
Plasma physics
Plasmas (physics)
Propagation modes
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Summary:The dispersion relation (DR) and Landau damping of basic electrostatic modes propagating in an electron-ion plasma modeled by a Cairn's distribution with a spectral index α are kinetically investigated. In the high-frequency range, i.e., ω / k > v t e , the DR and Landau damping of the electron Langmuir wave (LW) are obtained. In the low-frequency range where v t e > ω / k > v t i , the DR of ion acoustic wave (IAW) is investigated. The phase velocity and damping of both the Langmuir and the IAWs are shown to be significantly influenced by the nonthermality parameter α.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.5006802