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Proceedings Paper

Analysis of vibrational temperature of patterns in two-gas-species discharge by using photoelectronic detection systems
Author(s): Lichun Li; Lifang Dong; Yanzhao Zhang; Yuyan Qi; Zengchao Zhao
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Paper Abstract

The non-intrusive optical emission spectroscopy of the N2 second positive band system (C3Πu→B3Πg) are used to measure the vibrational temperature in N2/Ar and air/Ar discharges at atmospheric pressure, respectively. In N2/Ar discharges, the strip patterns can be obtained at the concentration of N2 from 9.5% to 38% at 10kV and 60kHz, and its vibrational temperature increases approximately from 1600K to 1750K with increasing the N2 concentration. Increasing the concentration of N2 from 38% to 96%, the hexagon patterns are formed and its vibrational temperature increases from 1750K to 1950K. In air/Ar discharges, three patterns (strips, quasisuperlattice and hexagon) are obtained with air concentration increasing from 9.5% to 96% at 10kV and 60kHz. The vibrational temperature ranges approximately from 1850K to 2750K, which is about 250~600K higher than that in N2/Ar discharges under the same concentration of N2 and air in two-gas-species. In addition, the quasisuperlattice can be observed at the air concentration from 19% to38%, and its vibrational temperature is from 2000K to 2300K approximately. It indicates that the gas species and the mixing ratios affect the patterns and their vibrational temperatures. Furthermore, it is also found that the breakdown voltage and the moment of discharge initiation are different as a function of the gas species and the mixing ratios.

Paper Details

Date Published: 22 February 2008
PDF: 7 pages
Proc. SPIE 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology, 66220G (22 February 2008); doi: 10.1117/12.790737
Show Author Affiliations
Lichun Li, Hebei Univ. (China)
Lifang Dong, Hebei Univ. (China)
Yanzhao Zhang, Hebei Univ. (China)
Yuyan Qi, Hebei Univ. (China)
Zengchao Zhao, Hebei Univ. (China)


Published in SPIE Proceedings Vol. 6622:
International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology

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