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Progress in Plasma Processing of Materials, 1999

ISBN:
1-56700-126-2 (Print)

EMISSION SPECTRA AND THE ELECTRON PARAMETERS OF HIGHLY IONIZED ARGON AND NITROGEN ARC-PRODUCED PLASMA JETS IN DIVERGENT CHANNELS WITH A VORTEX STABILIZATION

A. A. Belevtsev
Associated Institute for High Temperatures, Russian Academy of Science, Izhorskaya 13/19, Moscow, 125412 Russia

V. F. Chinnov
Associated Institute for High Temperatures, Russian Academy of Science, Izhorskaya 13/19, Moscow, 125412 Russia

E. Kh. Isakaev
Science and Engineering Center for Energy-Efficient Processes and Equipment of Joint, Institute for High Temperatures of Russian Academy of Sciences Izhorskaya 13/19, Moscow, 127412, Russia

A. V. Markin
Science and Engineering Centre for Energy Efficient Processes and Equipment, Associated Institute for High Temperatures, Russian Academy of Sciences Izhorskaya 13/19, Moscow, 127412, Russia

S.A. Tereshkin
Science and Technological Center of Associated Institute of High Temperature Russian Academy of Science - 13/19 Izhorskya St, Moscow, 127 412 - Russia

Abstract

Emission spectra of argon and nitrogen plasmas realized in a high current (I ≤ 500A) plasmatron with a divergent stabilizing channel have been taken in the range 220−860nm by the use of two automated systems for multichannel analysis. The spectra of highly ionized argon and nitrogen plasmas at atmospheric pressure thus obtained have been extensively investigated in the vicinity of the cathode where the specific energy released is about 50 kW/cm3 as well as in the plasma relaxation zone at different distances downstream from the energy input region. For all the domains mentioned the electron component parameters concentration ne and temperature Te have been determined.