Interfacial instabilities in high-energy-density plasmas are important topics in various research fields such as inertial confinement fusion, planetary sciences, and astrophysics. The growth of the instabilities can be examined in the laboratory by using high-power lasers coupled with high-resolution imaging technique. The resolutions both in space and time are essential for the observation of tiny and transient phenomena in high-energy-density plasmas. Here, the growth of a sinusoidal corrugation on the surface of a polystyrene foil during the laser-driven Richtmyer-Meshkov instability was measured by high-resolution X-ray shadowgraphy. In our experiment, a high-intensity short-pulse laser produced the X-ray flash that ensures a better temporal resolution. A Fresnel Phase Zone Plate was used for the improvement of spatial resolution, which realized an accuracy of 5.0 ± 1.0 µm in our system.

高能密度等离子体中的界面不稳定性是各种研究领域的重要课题，例如惯性约束聚变，行星科学和天体物理学。不稳定性的增长可以在实验室中通过使用高功率激光器和高分辨率成像技术来检查。时空分辨率对于观察高能密度等离子体中的微小瞬态现象至关重要。此处，通过高分辨率的X射线阴影照相法测量了激光驱动的Richtmyer-Meshkov不稳定性期间聚苯乙烯箔表面正弦波纹的生长。在我们的实验中，高强度短脉冲激光产生了X射线闪光，可以确保更好的时间分辨率。菲涅耳相带板用于改善空间分辨率，