论文标题
XUV探测辐射冲击实验的目标设计
Target Design for XUV Probing of Radiative Shock Experiments
论文作者
论文摘要
辐射冲击是在高温下等离子体的强烈冲击，其作为辐射的重要一部分。辐射冲击通常在许多天体物理系统中发现，并且是辐射流体动力流的模板，可以使用高功率激光器对其进行实验研究。这不仅在实验室天体物理学的背景下很重要，而且对于基准数值研究也很重要。我们介绍了有关在KJ量表PALS激光设施进行的Xenon气体辐射冲击实验设计的详细信息。它包括针对试管目标设计和数值研究的技术规格，其中包括1-D辐射流体动力学代码。重点是具有21 nm（〜58 eV）探测光束的XUV成像诊断的技术可行性，这使得可以同时探测震动后的后震后和前体区域。目标的新型设计以及改进的X射线光学元件和XUV源允许显示辐射冲击的致密后震后结构和前体。
Radiative shocks are strong shocks characterized by plasma at a high temperature emitting an important fraction of its energy as radiation. Radiative shocks are commonly found in many astrophysical systems and are templates of radiative hydrodynamic flows, which can be studied experimentally using high-power lasers. This is not only important in the context of laboratory astrophysics but also to benchmark numerical studies. We present details on the design of experiments on radiative shocks in xenon gas performed at the kJ scale PALS laser facility. It includes technical specifications for the tube targets design and numerical studies with the 1-D radiative hydrodynamics code MULTI. Emphasis is given to the technical feasibility of an XUV imaging diagnostic with a 21 nm (~58 eV) probing beam, which allows to probe simultaneously the post-shock and the precursor region ahead of the shock. The novel design of the target together with the improved X-ray optics and XUV source allow to show both the dense post-shock structure and the precursor of the radiative shock.
