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30 September 2013 High energy density plasmas produced by x-ray and extreme ultraviolet lasers
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A comprehensive simulation study is presented, examining the interaction of an EUV capillary discharge laser, operating at 46.9nm, within carbon at solid density. By incorporating a detailed model of photoionization, equation of state calculations, electronic term accounting and refractive index calculation into a pre-existing 2D radiative-hydrodynamic code POLLUX, target ablation and subsequent plasma expansion has been simulated for target material under intense (1011 W cm-2) EUV irradiation. Unique ablation based on direct photoionization by EUV photons creates solid density plasma with a temperature below 20eV. Plasma in this warm dense matter state is of particular interest to inertial con_nement fusion research. A reduction in focal spot size, due to a decrease in the di_raction limit, combined with increased target penetration allows for high-aspect ratio hole drilling and a signi_cant increase in the ejected target mass. This work outlines a comprehensive computational environment used to simulate the EUV/x-ray laser interaction within solid material and expanding plasma.
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Andrew K. Rossall, Valentin Aslanyan, and Greg J. Tallents "High energy density plasmas produced by x-ray and extreme ultraviolet lasers", Proc. SPIE 8849, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications X, 884912 (30 September 2013);

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