Temperature measurements by a spectroscopic method in high-density nitrogen positive corona discharges

Spectroscopic study of corona discharges is one way to analyze the physics of these type of  discharges. In particular, measuring the discharge temperatures gives access to information concerning the chemical reactivity of the medium [1]. The different temperatures: electronic Te, rotational Tr and vibrational Tv can be evaluated from the spectral analysis of the light emitted by the discharge [2, 3, 4]. Measurements of Te, Tr and Tv in nitrogen at atmospheric pressure (or lower) have already been published [3, 4, 5]. Rotational and vibrational