Abstract
This work is divided into two parts. In the first one, a study of radiative properties (such as monochromatic and the Rosseland and Planck mean opacities, monochromatic emissivities, and radiative power loss) and of the average ionization and charge state distribution of xenon plasmas in a range of plasma conditions of interest in laboratory astrophysics and extreme ultraviolet lithography is performed. We have made a particular emphasis in the analysis of the validity of the assumption of local thermodynamic equilibrium and the influence of the atomic description in the calculation of the radiative properties. Using the results obtained in this study, in the second part of the work we have analyzed a radiative shock that propagated in xenon generated in an experiment carried out at the Prague Asterix Laser System. In particular, we have addressed the effect of plasma self-absorption in the radiative precursor, the influence of the radiation emitted from the shocked shell and the plasma self-emission in the radiative precursor, the cooling time in the cooling layer, and the possibility of thermal instabilities in the postshock region.
Highlights
High-energy-density (HED) laboratory plasma astrophysics is a research field whose popularity has grown considerably over the past three decades
In this work we have analyzed the microscopic properties of xenon plasmas in ranges of matter densities (10−3–10−1 g cm−3) and electron temperatures (1–50 eV) typically found in extreme ultraviolet (EUV) lithography and some laboratory astrophysical experiments such as those related to the study of radiative shocks
We have found that the detailed level accounting (DLA) description does not introduce significant improvements with respect to the detailed configuration accounting (DCA) description, whereas the configuration interaction effects are considerable in both monochromatic and mean radiative properties
Summary
High-energy-density (HED) laboratory plasma astrophysics is a research field whose popularity has grown considerably over the past three decades. As far as we know, there is no exhaustive study of microscopic properties of xenon plasmas in the range of conditions of interest of many of laboratory astrophysics experiments on radiative shocks and of the influence of several issues on their calculations, such as the population kinetic model, atomic description, plasma self-absorption, or external radiation fields. These plasma properties (such as, for example, the average ionization, charge state distribution, opacities, and emissivities) are key ingredients in radiative-hydrodynamic simulations or to interpret experimental spectra.
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