Spectroscopic study of a long high-electron-density argon plasma column generated at atmospheric pressure

Shou-Zhe Li; Wen-Tong Huang; Dezhen Wang
February 2010
Physics of Plasmas;Feb2010, Vol. 17 Issue 2, p020702
Academic Journal
A stable plasma column is generated in a quartz tube using a pair of hollow electrodes driven by a sinusoidal power supply of 45 kHz at atmospheric pressure in argon. Two distinct operating modes (low-current and high-current modes) are identified through observing its discharge phenomena, measuring its electrical characteristics, and determining the gas temperatures by spectroscopic diagnosis of Q branch of UV OH spectrum. The electron density in the high-current mode is diagnosed by Stark broadening and is found to be two orders higher than that in low-current mode.


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