Orion laser上的反向传播辐射激波实验
Counter-propagating radiative shock experiments on the Orion laser
摘要：
我们提出了新的实验来研究辐射激波的形成和两个反向传播的辐射激波之间的相互作用。实验是在猎户座激光设施，这是用来驱动大纵横比气体细胞内的氙气冲击。两个冲击和它们各自的辐射前体之间的碰撞，加上固有的三维冲击的形成，提供了一个新的平台，特别适合于基准的数字代码。使用点投影X射线背光研究了碰撞前后冲击的动力学，同时通过光学激光干涉测量法测量了辐射前体中的电子密度。模拟实验使用2-D辐射流体动力学代码NYM/PETRA显示出非常好的协议与实验结果。
英文摘要：
We present new experiments to study the formation of radiative shocks and the interaction between two counter-propagating radiative shocks. The experiments were performed at the Orion laser facility which was used to drive shocks in xenon inside large aspect ratio gas-cells. The collision between the two shocks and their respective radiative precursors, combined with the formation of inherently 3-dimensional shocks, provides a novel platform particularly suited for benchmarking of numerical codes. The dynamics of the shocks before and after the collision were investigated using point-projection X-ray backlighting while, simultaneously, the electron density in the radiative precursor was measured via optical laser interferometry. Modelling of the experiments using the 2-D radiation hydrodynamic codes NYM/PETRA show a very good agreement with the experimental results.
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