Stuttgart 2012 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 15: Poster: Theorie/Modellierung
P 15.9: Poster
Mittwoch, 14. März 2012, 16:30–19:00, Poster.III
Plasma diagnostics applying K-line emission profiles of mid-Z materials — •Yiling Chen, Heidi Reinholz, and Gerd Roepke — Institut für Physik, Universität Rostock
Narrow K-line emission of some keV is known as an appropriate light scource for Thomson scattering on warm dense matter with solid and even over-solid electron density. However, as the K-spectra are emitted from a warm dense plasma themselves we are also able to infer plasma parameters by studying the line profiles [1]. Theoretical treatment of spectral line shifts is applied to various moderately ionized mid-Z materials. We focus on the opposing influence of ionization/excitation (blue shift) and plasma polarization effects (red shift).
Results on silicon (semi-conductor) are shown in comparison to titanium [1] (metal) and a chlorine [2] (polymere). Different configurations of the emitting Si ion (1s12s22pα, α=6,5,4) are considered that contribute components (KαLi, i=0,1,2) to the observed Kα line using codes to calculate the atomic states. Synthetic spectra have been evaluated and compared with experimental data [3].
[1] U. Zastrau, A. Sengebusch et al., High Energy Density Phys. 7, 47-53 (2011), [2] A. Sengebusch, H. Reinholz, and G. Röpke, Contrib. Plasma Phys. 49, 748 (2009), [3] J.Rzadkiewicz, A. Gojska et al., Phys.Rev.A 82, 012703 (2010).