Experimental and theoretical studies of the optical and electrical characteristics of a high-pressure pulsed discharge in argon

The optical and electrical characteristics of pulsed discharges in pure Ar at pressures of up to 7 atm, at which the discharge becomes unstable, are studied in a simple experimental device with automatic preionization. The gas temperature in the discharge is estimated from the width of the recorded...

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Bibliographic Details
Published inPlasma physics reports Vol. 30; no. 12; pp. 1052 - 1060
Main Authors Dem’yanov, A. V., Lo, D.
Format Journal Article
LanguageEnglish
Published United States 01.12.2004
Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON
ATOM COLLISIONS
ATOMS
ELECTRIC DISCHARGES
ELECTRODES
ELECTRON TEMPERATURE
EMISSION SPECTRA
ION TEMPERATURE
IONIZATION
MOLECULES
NUMERICAL ANALYSIS
PLASMA
PLASMA DIAGNOSTICS
PLASMA INSTABILITY
PLASMA PRESSURE
RELAXATION
TIME DEPENDENCE
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Summary:The optical and electrical characteristics of pulsed discharges in pure Ar at pressures of up to 7 atm, at which the discharge becomes unstable, are studied in a simple experimental device with automatic preionization. The gas temperature in the discharge is estimated from the width of the recorded emission spectrum. An analytical model of the vibrational relaxation of Ar*{sub 2}(v) is used to better determine the constants of the vibrational-translational relaxation of Ar*{sub 2}(v) molecules in their collisions with Ar atoms. The zero-dimensional numerical model of a pulsed discharge in Ar is modified. The experimental and calculated results are compared in detail. Good agreement is achieved between the measured and calculated time dependences of the electrode voltage and the intensity of spontaneous emission in the pressure range of 1-6 atm, as well as between the measured and calculated values of the gas temperature at pressures of 3-6 atm. Preliminary results from numerical studies of the possibility of achieving generation are discussed.
ISSN:1063-780X
1562-6938
DOI:10.1134/1.1839958