Vortex electron flux and EDF nonlocality of moderate and high-pressure gas discharge plasmas

Research outputpeer-review

1 Citation (Scopus)

Abstract

Even at medium and high pressures, when the standard, commonly accepted in the literature as the criterion of the applicability of the local field approximation (LFA) L > λ ϵ is fulfilled, the ambipolar field is shown to be dominant on the periphery of plasma, which leads to the formation of a vortex motion of electrons on the phase plane and LFA non-applicability for the solution of the Boltzmann kinetic equation. The spinning direction of the vortex depends on the behavior of the momentum transfer cross sections. In most cases, the vortex rotates counterclockwise; however, for decreasing cross-sections, a clockwise direction is possible. One manifestation of the vortexes is complex spatial profiles of the excitation rates and their constants on the periphery of the plasma volume.

Original languageEnglish
Article number045007
JournalPlasma Sources Science and Technology
Volume27
Issue number4
DOIs
Publication statusPublished - 25 Apr 2018

Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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title = "Vortex electron flux and EDF nonlocality of moderate and high-pressure gas discharge plasmas",
abstract = "Even at medium and high pressures, when the standard, commonly accepted in the literature as the criterion of the applicability of the local field approximation (LFA) L > λ ϵ is fulfilled, the ambipolar field is shown to be dominant on the periphery of plasma, which leads to the formation of a vortex motion of electrons on the phase plane and LFA non-applicability for the solution of the Boltzmann kinetic equation. The spinning direction of the vortex depends on the behavior of the momentum transfer cross sections. In most cases, the vortex rotates counterclockwise; however, for decreasing cross-sections, a clockwise direction is possible. One manifestation of the vortexes is complex spatial profiles of the excitation rates and their constants on the periphery of the plasma volume.",
keywords = "Boltzmann equation, gas discharge, low-temperature plasma, nonlocal electron distribution function",
author = "C. Yuan and Bogdanov, {E. A.} and Kudryavtsev, {A. A.} and Z. Zhou",
year = "2018",
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language = "English",
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T1 - Vortex electron flux and EDF nonlocality of moderate and high-pressure gas discharge plasmas

AU - Yuan, C.

AU - Bogdanov, E. A.

AU - Kudryavtsev, A. A.

AU - Zhou, Z.

PY - 2018/4/25

Y1 - 2018/4/25

N2 - Even at medium and high pressures, when the standard, commonly accepted in the literature as the criterion of the applicability of the local field approximation (LFA) L > λ ϵ is fulfilled, the ambipolar field is shown to be dominant on the periphery of plasma, which leads to the formation of a vortex motion of electrons on the phase plane and LFA non-applicability for the solution of the Boltzmann kinetic equation. The spinning direction of the vortex depends on the behavior of the momentum transfer cross sections. In most cases, the vortex rotates counterclockwise; however, for decreasing cross-sections, a clockwise direction is possible. One manifestation of the vortexes is complex spatial profiles of the excitation rates and their constants on the periphery of the plasma volume.

AB - Even at medium and high pressures, when the standard, commonly accepted in the literature as the criterion of the applicability of the local field approximation (LFA) L > λ ϵ is fulfilled, the ambipolar field is shown to be dominant on the periphery of plasma, which leads to the formation of a vortex motion of electrons on the phase plane and LFA non-applicability for the solution of the Boltzmann kinetic equation. The spinning direction of the vortex depends on the behavior of the momentum transfer cross sections. In most cases, the vortex rotates counterclockwise; however, for decreasing cross-sections, a clockwise direction is possible. One manifestation of the vortexes is complex spatial profiles of the excitation rates and their constants on the periphery of the plasma volume.

KW - Boltzmann equation

KW - gas discharge

KW - low-temperature plasma

KW - nonlocal electron distribution function

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U2 - 10.1088/1361-6595/aab75f

DO - 10.1088/1361-6595/aab75f

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