Optical Radiation of Atmospheric Pressure Plasma Jets Excited by a Barrier Discharge

Abstract

The luminescence spectra of plasma jets formed by a barrier discharge at atmospheric pressure in argon–air and helium–air mixtures have been studied experimentally in the spectral region of 270–900 nm. It is shown that the emission spectra of plasma jets are represented mainly by electronic-vibrational transitions of the second positive system of neutral nitrogen molecules in the ultraviolet range of the spectrum. The radiation powers of the studied mixtures are compared.