期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 43, 期 6, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/0022-3727/43/6/062001
关键词
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资金
- Japan ministry of education, culture, sports, science and technology (MEXT)
- DFG [TPA3]
Rapid formation of electric field profiles has been observed directly for the first time in nanosecond narrow-gap parallel-plate discharges at near-atmospheric pressure. The plasmas examined here are of hydrogen, and the field measurement is based on coherent Raman scattering (CRS) by hydrogen molecules. Combined with the observation of spatio-temporal light emission profiles by a high speed camera, it has been found that the rapid formation of a high-voltage thin cathode sheath is accompanied by fast propagation of an ionization front from a region near the anode. Unlike well-known parallel-plate discharges at low pressure, the discharge formation process at high pressure is almost entirely driven by electron dynamics as ions and neutral species are nearly immobile during the rapid process.
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