V. A. Korolenko, A. I. Zagoskin, K. V. Kozlov, T. A. Nikitina, G. S. Fedoseev, V. G. Samoilovich
Plasma diagnostics of the
barrier discharge plasma torch in argon flow in a capillary by
Radiation kinetics of the barrier discharge plasma
torch was studied by means of the technique of cross-correlation spectroscopy.
The emission spectrum was found to consist of the lines of the excited states
of argon, and of the bands of the hydroxyl radical and of the bands of the 2nd
positive system of molecular nitrogen. The analysis of the spatio-temporal
distributions of the radiation intensities of the selected spectral indicators
has shown the following. The torch emerges due to the ionizing waves that
propagate inside the capillary from the electrode system at a velocity of about
105 m/s and come outside to a distance of 3–4 mm. The dominant
channel of the formation of the excited molecular nitrogen N2(C3Pu) was found to be the reaction between the molecules of nitrogen in the
ground state and the atoms of argon in the excited states.
Copyright (C) Chemistry Dept., Moscow State University, 2002