Argon radiation behind of shock wave front

In this article, the results of an experimental study of non-equilibrium radiation of pure argon are presented. These results were obtained at the Institute of Mechanics of Lomonosow Moscow State University Shock Tube experimental complex. The main attention is focused to the study of the initial phase of radiation take place before the sharp increase electron concentration. The electron number density was determined with using of Stark broadening of Hα hydrogen line method. The panoramic spectra and individual radiation line evolution are presented. It is noted that radiation evolution at the initial stage depends strongly from radiation wavelength.