Kiel 2011 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 18: Poster: Theorie/Simulation dichter und stark gekoppelter Plasmen
P 18.27: Poster
Mittwoch, 30. März 2011, 16:30–18:30, Foyer
X-ray scattering as diagnostic tool for mixtures in warm dense matter — •Kathrin Wünsch1, Jan Vorberger1, Dave A. Chapman1,2, and Dirk O. Gericke1 — 1Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom — 2Plasma Physics Department, AWE plc. Aldermaston, Reading, Berkshire, United Kingdom
A deeper understanding of warm dense matter (WDM) is of particular interest, not only in the research of astrophysical objects, but also in the progress towards inertial confinement fusion.
The development of powerful lasers makes it possible to study WDM in the laboratory. X-ray scattering has become an effective diagnostic tool to determine basic plasma parameters as well as structural information. A complete diagnostics does however rely on an excellent theoretical understanding of the material under consideration. Recently, attention was brought to multicomponent WDM where the interplay of different ions species gives rise to new features.
We developed a consistent model to analyse the scattering spectra including multicomponent effects. Therefore, we generalised the Chihara formula and determine all the cross correlations required. The results will show that x-ray scattering can also be used to investigate mixtures under extreme conditions due to significant differences of the multicomponent description to a single-ion component approach. Furthermore, we will present results how the scattering spectra will change if non-equilibrium distributions are applied.