Plasma diagnostics of barrier-torch discharge in argon flow in a capillary by cross-correlation spectroscopy |
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Authors: | V A Korolenko A I Zagoskin K V Kozlov T A Nikitina G S Fedoseev V G Samoilovich |
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Institution: | 1.Division of Physical Chemistry,Moscow State University,Moscow,Russia |
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Abstract: | The radiation kinetics of the plasma of barrier-torch disrcharge in argon flow in a capillary has been studied by cross-correlation
spectroscopy. It was established that the discharge emission spectrum consists of peaks of electronically excited states of
argon, bands of hydroxyl radicals, and a second positive system of nitrogen. An analysis of the spatio-temporal distributions
of emission intensity for the selected spectral indicators showed that the causes of the torch are ionization waves that extend
through the capillary from the electrode system with a speed of 105 m/s and project up to 3–4 mm. It was established that the formation of electronically excited molecules of nitrogen N2(C
3Π
u
) in the torch of discharge occurs mainly on the reaction between metastable electronically excited atoms of argon and molecules
of nitrogen in the electronic ground state. |
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Keywords: | |
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