Ambipolar field role in formation of electron distribution function in gas discharge plasma

It is shown that the local approximation for electron distribution function (EDF) determination at plasma periphery, where the ambipolar field is dominant, is not applicable even at high pressures when the characteristic plasma size exceeds the energy relaxation length of the electrons R > λ(ε)....

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Autores principales: Yuan, Chengxun, Bogdanov, E. A., Kudryavtsev, A. A., Rabadanov, K. M., Zhou, Zhongxiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5668321/
https://www.ncbi.nlm.nih.gov/pubmed/29097805
http://dx.doi.org/10.1038/s41598-017-15073-6
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author Yuan, Chengxun
Bogdanov, E. A.
Kudryavtsev, A. A.
Rabadanov, K. M.
Zhou, Zhongxiang
author_facet Yuan, Chengxun
Bogdanov, E. A.
Kudryavtsev, A. A.
Rabadanov, K. M.
Zhou, Zhongxiang
author_sort Yuan, Chengxun
collection PubMed
description It is shown that the local approximation for electron distribution function (EDF) determination at plasma periphery, where the ambipolar field is dominant, is not applicable even at high pressures when the characteristic plasma size exceeds the energy relaxation length of the electrons R > λ(ε). Therefore, consistent results can be obtained only when solving the complete kinetic equation in both energy and spatial variables (i.e. it is necessary to solve nonlocal kinetic equation).
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spelling pubmed-56683212017-11-15 Ambipolar field role in formation of electron distribution function in gas discharge plasma Yuan, Chengxun Bogdanov, E. A. Kudryavtsev, A. A. Rabadanov, K. M. Zhou, Zhongxiang Sci Rep Article It is shown that the local approximation for electron distribution function (EDF) determination at plasma periphery, where the ambipolar field is dominant, is not applicable even at high pressures when the characteristic plasma size exceeds the energy relaxation length of the electrons R > λ(ε). Therefore, consistent results can be obtained only when solving the complete kinetic equation in both energy and spatial variables (i.e. it is necessary to solve nonlocal kinetic equation). Nature Publishing Group UK 2017-11-03 /pmc/articles/PMC5668321/ /pubmed/29097805 http://dx.doi.org/10.1038/s41598-017-15073-6 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Yuan, Chengxun
Bogdanov, E. A.
Kudryavtsev, A. A.
Rabadanov, K. M.
Zhou, Zhongxiang
Ambipolar field role in formation of electron distribution function in gas discharge plasma
title Ambipolar field role in formation of electron distribution function in gas discharge plasma
title_full Ambipolar field role in formation of electron distribution function in gas discharge plasma
title_fullStr Ambipolar field role in formation of electron distribution function in gas discharge plasma
title_full_unstemmed Ambipolar field role in formation of electron distribution function in gas discharge plasma
title_short Ambipolar field role in formation of electron distribution function in gas discharge plasma
title_sort ambipolar field role in formation of electron distribution function in gas discharge plasma
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5668321/
https://www.ncbi.nlm.nih.gov/pubmed/29097805
http://dx.doi.org/10.1038/s41598-017-15073-6
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