Time-resolved electron density measurements in PF-1000 device by means of the Mechelle® 900 optical spectrometer

Abstract

The report presents the main results of the recent spectroscopic investigations of plasma produced within the PF-1000 facility. That experimental device was operated mostly with the pure deuterium filling. The initial pressure was 5 hPa D2 or H2 and the charging voltage of a capacity bank was 28 kV. The electron density was estimated by means of three different techniques: the linear Stark broadening of the Balmer series, the quadratic Stark broadening of copper and carbon spectral lines (including the lines of multi-charged ions), and using the Inglis-Teller correlation for a shift of the boundary serial. At all the stages of the data processing there was applied a convenient and effective software of the GRAMS-32 type (attached to the MECHELLE®900 spectrometer). A critical evaluation of the obtained results, taking into consideration their accuracy and reliability, has been performed.