Abstract

The aim of the contribution is to give a short review about our spectroscopical temperature measuremęnts in an argon jet. These measurements have been carried out in our Institute as a part of the programme of heat exchange between high-temperature gases and their neighbourhood. 

In our experiments a plasma-generator has been used as a source of heated gases. The used plasma-generator, designed in our Institute for measuring purposes, is described in [1]. In an argon jet heated by this tool, two regions can readily be distinguished, namely a bright core and a far less radiating outer zone. The spectra of these two regions are different. In the spectrum of the core continuous radiation and neutral argon lines are present. Ionized argon lines are absent. Some neutral argon lines are apparently broadened. This broadening grows with upper level energy. The lines with upper level energy above 15.45 eV cannot usually be distinguished from continuum.