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Proceedings Paper

Spectroscopic determination of gas temperature in high-pressure nonthermal equilibrium microwave discharge in hydrogen
Author(s): S. I. Gritsinin; I. A. Kossyi; K. F. Sergeichev; V. P. Silakov; I. A. Sychev; N. M. Tarasova; A. V. Chebotarev
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Paper Abstract

Results of theoretical analysis and experimental determinations of the gas temperature and plasma parameters in a microwave discharge not at thermal equilibrium are presented. The investigation is concerned with high-pressure hydrogen under conditions such that radiation is emitted both by atomic and molecular components of the plasma and primarily governed by interaction of the excited atoms and molecules with heavy particles. Because this takes place the approximate models which are successfully applied to analysis data from spectroscopic diagnostics cannot be used to describe the radiative properties of the discharge. One of the main objectives of research consists of making headway in spectral methods of gas-temperature determination in the high-pressure range by invoking for interpretation of experimental data calculations performed in the framework of the kinetic scheme of thermal non-equilibrium discharge in hydrogen as well as general physical reasoning relating to the role of interactions between heavy particles in nonequilibrium plasma radiation. The following measurement techniques have been used: spectral measurements of Balmerseries radiation; spectral measurement of gas temperature Tg by recording the Doppler broadening of the H?; and spectral measurements of Tg by recording the Fulcher band. Measurements ofthe gas temperature agree satisfactorily under the assumption that collisions of excited particles with heavy components of a gas-discharge medium are of considerable importance. Conclusions regarding the ion composition and degree ofdissociation of hydrogen molecules can be drawn.

Paper Details

Date Published: 19 March 2002
PDF: 11 pages
Proc. SPIE 4460, Selected Research Papers on Spectroscopy of Nonequilibrium Plasma at Elevated Pressures, (19 March 2002); doi: 10.1117/12.459405
Show Author Affiliations
S. I. Gritsinin, Institute of General Physics (Russia)
I. A. Kossyi, Institute of General Physics (Russia)
K. F. Sergeichev, Institute of General Physics (Russia)
V. P. Silakov, Institute of General Physics (Russia)
I. A. Sychev, Institute of General Physics (Russia)
N. M. Tarasova, Institute of General Physics (Russia)
A. V. Chebotarev, Institute of General Physics (Russia)

Published in SPIE Proceedings Vol. 4460:
Selected Research Papers on Spectroscopy of Nonequilibrium Plasma at Elevated Pressures
Vladimir N. Ochkin, Editor(s)

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