论文标题
开发用于高重复率XFEL实验的浆液靶
Development of slurry targets for high repetition-rate XFEL experiments
论文作者
论文摘要
将X射线游离电子激光器（XFEL）与高功率激光驱动器相结合，可以研究相变，状态方程，晶粒的生长，强度和转化途径，这是沿不同热力学压缩路径的压力到100S GPA的函数。未来的高重复速率激光器运行将使数据累积在> 1 Hz的情况下，这带来了许多实验挑战，包括需要快速补充目标。在这里，我们提出了对体积％环氧树脂（50）-Crystalline Grains（50）（Slurry）靶标的休克压缩和X射线衍射研究，可以将其形成挤压丝带，以进行高重复率操作。对于负载减震的NaCl-Slurry样品，我们观察到嵌入式NaCl晶粒内的压力，密度和温度态，与观测到冲击压缩的单晶NaCl一致。
Combining an x-ray free electron laser (XFEL) with high power laser drivers enables the study of phase transitions, equation-of-state, grain growth, strength, and transformation pathways as a function of pressure to 100s GPa along different thermodynamic compression paths. Future high-repetition rate laser operation will enable data to be accumulated at >1 Hz which poses a number of experimental challenges including the need to rapidly replenish the target. Here, we present a combined shock-compression and X-ray diffraction study on vol% epoxy(50)-crystalline grains(50) (slurry) targets, which can be fashioned into extruded ribbons for high repetition-rate operation. For shock-loaded NaCl-slurry samples, we observe pressure, density and temperature states within the embedded NaCl grains consistent with observations for shock-compressed single-crystal NaCl.
