Ambipolar field role in formation of electron distribution function in gas discharge plasma.
作者信息
Yuan Chengxun, Bogdanov E A, Kudryavtsev A A, Rabadanov K M, Zhou Zhongxiang
机构信息
Department of Physics, Harbin Institute of Technology, Harbin, 150001, China.
Saint Petersburg State University, St. Petersburg, 199034, Russia.
出版信息
Sci Rep. 2017 Nov 6;7(1):14613. doi: 10.1038/s41598-017-15073-6.
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 . 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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