Augsburg 2006 – wissenschaftliches Programm

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P: Plasmaphysik

P 33: Diagnostik 4

P 33.5: Vortrag

Donnerstag, 30. März 2006, 12:15–12:30, 1002

Theoretical Study of the Balmer Line Profile of Neutral Hydrogen — •Banaz Omar¹, August Wierling¹, Sibylle Günter², and Gerd Röpke¹ — ¹Universität Rostock, Institut für Physik, D-18051 Rostock, Germany — ²Max-Planck-Institut für Plasmaphysik, D-85748 Garching, Germay

The profiles of Balmer lines for neutral hydrogen are calculated using a microscopic quantum-statistical approach, assuming local thermal equilibrium (S. Günter et al. 1991). Self absorption is taken into account by solving a one-dimensional radiation transport equation for a plasma layer (S. Sorge et al. 2000), the bound-free and free-free contributions to the continuous spectrum are also considered. The calculated synthetic spectra are compared with the experimental results (R. Radtke and K. Günter 1986) of H_α, H_β and H_γ for plasmas generated by a wall-stabilized discharge arc in a temperature range (13000−22000) K and the corresponding electron density (10²³−10²⁴) m⁻³. The present results are in good agreement with other calculated and experimentally measured spectra.

S. Günter, L. Hitzschke and G. Röpke 1991 Phys. Rev. A44, 6834.

S. Sorge, A. Wierling, G. Röpke, W. Theobald, R. Sauerbrey, T. Wilhein 2000 J. Phys. B: At. Mol. Opt. Phys. 33, 2983.

R. Radtke and K. Günter 1986 Contrib. Plasma Phys. 26, 143