期刊
IEEE TRANSACTIONS ON PLASMA SCIENCE
卷 37, 期 6, 页码 852-858出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPS.2009.2015949
关键词
Argon microdischarge; atmospheric pressure microplasma; diode laser absorption spectroscopy; metastable density; plasma diagnostics
资金
- Department of Energy [DE-FG02-03ER54713]
- University of Houston
- Texas Advanced Research Program
Tunable diode laser absorption spectroscopy was employed to measure the spatially resolved density of argon metastables (1s(5)) in a high-pressure direct-current argon microdischarge. Analysis of absorption lineshapes provided the gas temperature. The metastable density peaked near the cathode and decayed rapidly in the bulk plasma. The metastable density increased with increasing pressure but decreased with increasing discharge current. Neutral gas heating and the resulting drop in gas density were responsible for the metastable density decrease with increasing current.
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