The krypton-fluoride Nike laser delivers up to 2 KJ in 248 nm ultraviolet radiation to planar targets with the most uniform illumination of all existing high-energy lasers for inertial confinement fusion (ICF) research. That, combined with high-resolution monochromatic x-ray imaging pioneered at NRL in the 1990s and the recently added two-dimensional (2D) VISAR diagnostics, provides a unique platform for experimental studies of hydrodynamic phenomena important to the inertial confinement fusion (ICF). These include absolute experimental determination of the primary Hugoniots of low-density plastic foams in the Mbar pressure range. Although foam materials have many uses for the manufacturing of ICF targets ranging from laser fusion to Z-pinch-driven dynamic hohlraums, no experimental data on their shock compressibility in the ICF-relevant pressure range was available until our experiments. We describe the first systematic experimental study of the nonlinear, multi-mode perturbation evolution triggered by localized target non-uniformities, such as straight grooves and dots, which emulate fill tubes, tents, and other target-mounting structures in laser capsules. The experimental data turned out to be counter-intuitive and challenging for simulations. Finally, the 2D VISAR snap-shot images of the shock velocity field made it possible to directly measure the roughness of a uniformly driven shock front propagating into the target, which is caused by ISI-smoothed laser imprint. Initial measurements for planar CH targets with and without thin high-Z layers added for the imprint mitigation have been successfully performed.

氟化k耐克激光器在248 nm紫外线中向平面目标提供高达2 KJ的辐射，在所有现有的用于惯性约束聚变（ICF）研究的高能激光器中，其照度最高。结合1990年代NRL率先开发的高分辨率单色X射线成像以及最近添加的二维（2D）VISAR诊断，为实验研究对惯性约束聚变（ICF）重要的流体动力学现象提供了独特的平台。这些包括绝对实验确定Mbar压力范围内的低密度塑料泡沫的主要Hugoniots。尽管泡沫材料在制造ICF标靶方面有许多用途，从激光熔合到Z捏合驱动的动态角度仪，在我们进行实验之前，尚没有有关它们在ICF相关压力范围内的冲击可压缩性的实验数据。我们描述了由局部目标不均匀性（例如直槽和点）触发的非线性，多模摄动演变的首次系统实验研究，这些不均匀性模拟了激光管中的填充管，帐篷和其他目标安装结构。实验数据证明是违反直觉的，并且对模拟具有挑战性。最后，冲击速度场的2D VISAR快照图像使得直接测量传播到目标中的均匀驱动的冲击锋面的粗糙度成为可能，这是由ISI平滑的激光压印引起的。