Space Plasma, Power and Propulsion Group, Research School of Physics and Engineering, The Australian National University,
Department of Electronic Engineering, Tohoku University,
Department of Electrical and Electronic Engineering, Iwate University
Space Plasma, Power and Propulsion Group, Research School of Physics and Engineering,
The Australian National University
Space Plasma, Power and Propulsion Group, Research School of Physics and Engineering,
The Australian National University
Space Plasma, Power and Propulsion Group, Research School of Physics and Engineering,
The Australian National University,
Department of Electrical Engineering and Computer Sciences, University of California
Department of Electronic Engineering, Tohoku University
登録日
2011-01-19
雑誌名
Journal of Physics D: Applied Physics
巻
43
号
16
ページ
162001
発行年
2010-04-08
ISSN
0022-3727
Abstract
Electron temperature is characterized in a low-pressure argon plasma diffusing from a magnetically expanding radiofrequency plasma containing a current-free double layer (DL) over the argon gas pressure of 0.3–3 mTorr. The measured electron energy probability function (EEPF) is Maxwellian at the downstream side of the DL, while the upstream EEPF shows a depleted tail corresponding to free electrons, which can overcome the potential drop of the DL and diffuse into the downstream side. The free electrons relating to the amplitude of the DL electrically neutralize a supersonic ion beam accelerated by the DL. The electron temperature measured at the downstream plasma is found to be in good agreement with that of the free electrons in the upstream source tube and agrees with the numerical result given from low-pressure diffusion theory.
出版者
IOP Publishing
権利
This is an author-created, un-copyedited version of an article accepted for publication in Journal of Physics D: Applied Physics . IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at 10.1088/0022-3727/43/16/162001.
Characterization of the temperature of free electrons diffusing from a magnetically expanding current-free double layer plasma
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