Abstract
AbstractWe re‐examine several Balmer spectra obtained from high‐pressure arc discharges (Radtke and Günther, Contrib. Plasma Phys. 26, 143 (1986); Radtke, Günther, and Spanke, ibid. 26, 151 (1986)). By matching synthetic spectra to the experimental line profiles, we infer plasma parameters such as density, temperature, and composition. Spectral line modeling is based on a microscopic quantum statistical approach. Corrections accounting to the merging lines near the threshold are describe following a model of D'yachkov. Self‐absorption is clearly visible in the spectra and accounted for in one‐dimensional model assuming thermal equilibrium. A consistency check is performed by comparing to the broadening of silicon impurity lines, where present in some of the spectra. Furthermore, a comparison is made with predictions from a fluid variational model for the composition and the equation of state of the plasma (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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