In this work we present experimental results on the behavior of diamond at megabar pressure. The experiment was performed using the PHELIX facility at GSI in Germany to launch a planar shock into solid multi-layered diamond samples. The target design allows shock velocity in diamond and in two metal layers to be measured as well as the free surface velocity after shock breakout. As diagnostics, we used two velocity interferometry systems for any reflector (VISARs). Our measurements show that for the pressures obtained in diamond (between 3 and 9 Mbar), the propagation of the shock induces a reflecting state of the material. Finally, the experimental results are compared with hydrodynamical simulations in which we used different equations of state, showing compatibility with dedicated SESAME tables for diamond.

中文翻译：

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在兆巴压力范围内反射金刚石中的激光驱动冲击

在这项工作中，我们展示了钻石在兆巴压力下的行为的实验结果。该实验是使用德国 GSI 的 PHELIX 设施进行的，以向固体多层金刚石样品发射平面冲击。目标设计允许测量金刚石和两个金属层中的冲击速度以及冲击爆发后的自由表面速度。作为诊断，我们对任何反射器 (VISAR) 使用了两个速度干涉测量系统。我们的测量表明，对于金刚石中获得的压力（3 到 9 Mbar 之间），冲击的传播会引起材料的反射状态。最后，将实验结果与我们使用不同状态方程的流体动力学模拟进行比较，显示出与金刚石专用 SESAME 表的兼容性。