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Progress in Plasma Processing of Materials, 2001

ISBN:
1-56700-165-3 (Print)

GAS TEMPERATURE IN CONTRACTED ATMOSPHERIC PRESSURE DISCHARGES SUSTAINED IN CYLINDRICAL TUBES BY MICROWAVES AT 2450 MHZ

Y. Kabouzi
Groupe de physique des plasmas, Universite de Montreal, Montreal H3C 3J7, Quebec

M. D. Calzada
Departemento de Fisica, Universidad de Cordoba, 14071-Cordoba, Spain

Michel Moisan
Groupe de physique des plasmas, Universite de Montreal, BP 6128, succursale Centre-ville, Montreal H3C 3J7, Quebec, Canada

C. Trassy
UPR 9033 CNRS - EPM, ENSHMG BP 95 - 38402 Saint-Martin-d'Heres - France

Abstract

Emission spectroscopy has been used to carry out temperature measurements on atmospheric pressure surface-wave sustained plasmas in argon and neon gases. OH molecular spectra and atomic spectral line profiles were employed to determine the discharge rotational and translational temperatures, respectively. The rotational temperature (Trot) is found to be lower than the translational temperature (Tg). Although radial constriction of the discharge is higher in argon than in neon, we found Tg(neon) ~ Tg(argon) and Trot(neon) ~ Trot(argon).