期刊
PLASMA SOURCES SCIENCE & TECHNOLOGY
卷 29, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6595/ab8177
关键词
electron sheaths; fireballs; double layer; plasma
资金
- Office of Fusion Energy Science at the U.S. Department of Energy [DE-AC04-94SL85000, DE-SC0016473]
- U.S. Department of Energy (DOE) [DE-SC0016473] Funding Source: U.S. Department of Energy (DOE)
Biased electrodes are common components of plasma sources and diagnostics. The plasma-electrode interaction is mediated by an intervening sheath structure that influences properties of the electrons and ions contacting the electrode surface, as well as properties of the bulk plasma. A rich variety of sheath structures have been observed, including ion sheaths, electron sheaths, double sheaths, double layers, anode glow, and fireballs. These represent complex self-organized responses of the plasma that depend not only on the local influence of the electrode, but also on the global properties of the plasma and the other boundaries that it is in contact with. This review summarizes recent advances in understanding the conditions under which each type of sheath forms, what the basic stability criteria and steady-state properties of each are, and the ways in which each can influence plasma-boundary interactions and bulk plasma properties. These results may be of interest to a number of application areas where biased electrodes are used, including diagnostics, plasma modification of materials, plasma sources, electric propulsion, and the interaction of plasmas with objects in space.
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