High energy density plasmas produced by x-ray and extreme ultraviolet lasers
High energy density plasmas produced by x-ray and extreme ultraviolet lasers
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X 射线和极紫外激光产生的高能量密度等离子体
DOI：
10.1117/12.2023232
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Rossall A
中科院分区：
文献类型：
--
作者：
Rossall A
一个全面的模拟研究，研究的EUV毛细管放电激光器，在46.9nm，在固体密度的碳内的相互作用。通过将详细的光电离模型，状态方程计算，电子项会计和折射率计算到一个预先存在的二维辐射流体动力学程序POLLUX，目标烧蚀和随后的等离子体膨胀已模拟强（1011 W cm-2）EUV照射下的目标材料。基于EUV光子直接光电离的独特烧蚀产生温度低于20 eV的固体密度等离子体。在这种热的稠密物质状态下的等离子体对惯性聚变研究特别有意义。焦斑尺寸的减小，由于减少的di_raction限制，结合增加的目标穿透允许高深宽比钻孔和喷射的目标质量的显着增加。这项工作概述了一个全面的计算环境，用于模拟固体材料和膨胀等离子体内的EUV/x射线激光相互作用。
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 (1011W 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.