Study of the balmer beta core in a pulsed plasma

Abstract

The center of the H β line with Stark broadening has been studied in a pulsed source. Self-absorption and noise were eliminated. Electron densities ranged from 1.3×10 16 to 4×10 16cm -3 and were obtained by fitting the half-widths to the theory of Kepple and Griem. Comparisons have been made with other experimental data on wall-stabilized arcs. Our measured dip was a little lower than that of Wiese et al. Systematic asymmetries are observed and our data show good agreement with the experimental values of Wiese and Kelleher and of Helbig and Nick.