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Experimental study on attenuation of high power laser-induced shock waves in copper

机译：大功率激光诱导铜中冲击波衰减的实验研究

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摘要

When a high power laser is focused onto a solid, the blow-off of the high temperature plasma generated at the target surface can induce a shock wave inside the material. The ultrahigh pressures generated in the material are useful in the dynamic high-pressure technology and inertial-confinement-fusion. Although many investigations have been made on laser-induced shock waves and the estimated pressures were obtained by Gu Yuan et al. using optical methods, few direct measurements of pressures have been made in order to dig out the attenuation of laser-induced shock waves up to now. In this note shock pressures in copper are measured by use of PVDF gauges made by the authors, and the attenuation of laser-induced shock waves is experimentally obtainedfor the first time. These results are very useful for studying constitutive relations of materials at the ultrahigh pressures and strain rates, and also useful for laser shock processing.
机译：当高功率激光聚焦到固体上时，在目标表面产生的高温等离子体的吹散会在材料内部引起冲击波。材料中产生的超高压可用于动态高压技术和惯性约束融合。尽管已经对激光诱发的冲击波进行了许多研究，并且估计的压力是由Gu Yuan等人获得的。迄今为止，使用光学方法进行压力的直接测量很少，以便找出激光诱导的冲击波的衰减。在本说明中，使用作者制造的PVDF压力表测量了铜中的冲击压力，并且首次通过实验获得了激光感应冲击波的衰减。这些结果对于研究超高压和应变速率下材料的本构关系非常有用，也可用于激光冲击加工。

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