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Equality of Higher-Order Diffusion Coefficients between Component and Composite Electron Swarms in Gas

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Title: Equality of Higher-Order Diffusion Coefficients between Component and Composite Electron Swarms in Gas
Authors: Sugawara, Hirotake Browse this author →KAKEN DB
Sakai, Yosuke Browse this author
Keywords: electrical discharge
plasma
simulation
transport parameter
electron swarm
diffusion coefficient
drift equilibrium
cumulant
moment
Issue Date: 8-Jun-2006
Publisher: Japan Society of Applied Physics
Journal Title: Japanese Journal of Applied Physics
Volume: 45
Issue: 6a
Start Page: 5189
End Page: 5196
Publisher DOI: 10.1143/JJAP.45.5189
Abstract: When an electron swarm in gas is composed of component electron swarms individually in drift equilibrium, the higher-order diffusion coefficients (HDCs) of the composite electron swarms are equal to those of the component electron swarms. We have derived this equality theoretically and have examined it by numerical simulation. The HDCs are the time derivatives of higher-order cumulants, which are quantities characterizing the shape of a spatial electron distribution. This fact seemingly indicates the dependence of the HDCs of the composite electron swarms on the arrangement of the component electron swarms. However, the equality holds irrespective of the relative positions and electron populations of the component electron swarms. We have given a consistent explanation to these facts. We have also discussed electron swarm development from dispersed or multiple electron sources that may appear in practical experiments.
Rights: Copyright © 2006 The Japan Society of Applied Physics
Type: article (author version)
URI: http://hdl.handle.net/2115/33071
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 菅原 広剛

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