Conductivity and Permittivity in Plasma with nonequilibrium Electron Distribution Function

Jinming Li, Igor Getmanov, Anatoliy A. Kudryavtsev , Chengxun Yuan, Xiaoou Wang, Zhou Zhongxiang

Research output

Abstract

Electron conductivity and dielectric permittivity are essential parameters that determine the external characteristics of laboratory and space plasmas in terms of electromagnetic (EM) wave propagation. In most problems, σ and ϵ are calculated using the elementary theory under the assumption that the electron distribution function (EDF) is under equilibrium (Maxwellian). But, in real plasma, the EDF is, as a rule, non-Maxwellian. Therefore, the form of EDF can significantly affect the characteristics of various processes involving electrons. In this article, the calculations of the correction coefficients for conductivity and permittivity in argon were performed in a wide frequency range for typical two-temperature EDFs, with which almost any EDF in the laboratory and ionospheric plasma can be approximated. The results show that the form of EDF has a significant effect on the conductivity and the permittivity in plasma. Most substantial differences are observed under conditions when the frequency of the EM wave is less than the transport electron-gas collision frequency of electrons.
Original languageEnglish
Number of pages6
JournalIEEE Transactions on Plasma Science
Early online date24 Dec 2019
Publication statusE-pub ahead of print - 24 Dec 2019

Fingerprint

electron distribution
distribution functions
permittivity
conductivity
electromagnetic radiation
space plasmas
electrons
ionospherics
electron gas
wave propagation
frequency ranges
argon
collisions
coefficients
temperature

Cite this

@article{2a97a94b6c6b4da59dfb2bfca3083ed3,
title = "Conductivity and Permittivity in Plasma with nonequilibrium Electron Distribution Function",
abstract = "Electron conductivity and dielectric permittivity are essential parameters that determine the external characteristics of laboratory and space plasmas in terms of electromagnetic (EM) wave propagation. In most problems, σ and ϵ are calculated using the elementary theory under the assumption that the electron distribution function (EDF) is under equilibrium (Maxwellian). But, in real plasma, the EDF is, as a rule, non-Maxwellian. Therefore, the form of EDF can significantly affect the characteristics of various processes involving electrons. In this article, the calculations of the correction coefficients for conductivity and permittivity in argon were performed in a wide frequency range for typical two-temperature EDFs, with which almost any EDF in the laboratory and ionospheric plasma can be approximated. The results show that the form of EDF has a significant effect on the conductivity and the permittivity in plasma. Most substantial differences are observed under conditions when the frequency of the EM wave is less than the transport electron-gas collision frequency of electrons.",
keywords = "dielectric permittivity, electron conductivity, non-Maxwellian electron distribution function (EDF).",
author = "Jinming Li and Igor Getmanov and Kudryavtsev, {Anatoliy A.} and Chengxun Yuan and Xiaoou Wang and Zhou Zhongxiang",
year = "2019",
month = "12",
day = "24",
language = "English",
journal = "IEEE Transactions on Plasma Science",
issn = "0093-3813",
publisher = "Institute of Electrical and Electronics Engineers Inc.",

}

TY - JOUR

T1 - Conductivity and Permittivity in Plasma with nonequilibrium Electron Distribution Function

AU - Li, Jinming

AU - Getmanov, Igor

AU - Kudryavtsev , Anatoliy A.

AU - Yuan, Chengxun

AU - Wang, Xiaoou

AU - Zhongxiang, Zhou

PY - 2019/12/24

Y1 - 2019/12/24

N2 - Electron conductivity and dielectric permittivity are essential parameters that determine the external characteristics of laboratory and space plasmas in terms of electromagnetic (EM) wave propagation. In most problems, σ and ϵ are calculated using the elementary theory under the assumption that the electron distribution function (EDF) is under equilibrium (Maxwellian). But, in real plasma, the EDF is, as a rule, non-Maxwellian. Therefore, the form of EDF can significantly affect the characteristics of various processes involving electrons. In this article, the calculations of the correction coefficients for conductivity and permittivity in argon were performed in a wide frequency range for typical two-temperature EDFs, with which almost any EDF in the laboratory and ionospheric plasma can be approximated. The results show that the form of EDF has a significant effect on the conductivity and the permittivity in plasma. Most substantial differences are observed under conditions when the frequency of the EM wave is less than the transport electron-gas collision frequency of electrons.

AB - Electron conductivity and dielectric permittivity are essential parameters that determine the external characteristics of laboratory and space plasmas in terms of electromagnetic (EM) wave propagation. In most problems, σ and ϵ are calculated using the elementary theory under the assumption that the electron distribution function (EDF) is under equilibrium (Maxwellian). But, in real plasma, the EDF is, as a rule, non-Maxwellian. Therefore, the form of EDF can significantly affect the characteristics of various processes involving electrons. In this article, the calculations of the correction coefficients for conductivity and permittivity in argon were performed in a wide frequency range for typical two-temperature EDFs, with which almost any EDF in the laboratory and ionospheric plasma can be approximated. The results show that the form of EDF has a significant effect on the conductivity and the permittivity in plasma. Most substantial differences are observed under conditions when the frequency of the EM wave is less than the transport electron-gas collision frequency of electrons.

KW - dielectric permittivity

KW - electron conductivity

KW - non-Maxwellian electron distribution function (EDF).

UR - https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=8941105

UR - https://ieeexplore.ieee.org/search/searchresult.jsp?newsearch=true&queryText=Conductivity%20and%20Permittivity%20in%20Plasma%20with%20nonequilibrium%20Electron%20Distribution%20Function

M3 - Article

JO - IEEE Transactions on Plasma Science

JF - IEEE Transactions on Plasma Science

SN - 0093-3813

ER -