Observation of laser-driven shock propagation by nanosecond time-resolved Raman spectroscopy
Observation of laser-driven shock propagation by nanosecond time-resolved Raman spectroscopy
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DOI：
10.1063/1.4906211
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发表时间：
2015-01
影响因子：
3.2
通讯作者：
Guoyang Yu;Xian-xu Zheng;Yunfei Song;Yangyang Zeng;Wencan Guo;Jun Zhao;Yanqiang Yang
中科院分区：
文献类型：
--
作者：
Guoyang Yu;Xian-xu Zheng;Yunfei Song;Yangyang Zeng;Wencan Guo;Jun Zhao;Yanqiang Yang
利用改进的纳秒时间分辨拉曼光谱技术对蒽/环氧树脂胶层中激光驱动冲击波的传播过程进行了研究。采用数字延迟代替光学延迟线，实现了对冲击加载和冲击卸载的连续观测。利用拉曼峰移模拟方法对蒽的拉曼光谱进行拟合，确定了激波的峰值压力、压力分布以及激波在规范层中的位置。并根据激波阵面位置随时间的变化计算了激波的速度。
An improved nanosecond time-resolved Raman spectroscopy is performed to observe laser-driven shock propagation in the anthracene/epoxy glue layer. The digital delay instead of optical delay line is introduced for sake of unlimited time range of detection, which enables the ability to observe both shock loading and shock unloading that always lasts several hundred nanoseconds. In this experiment, the peak pressure of shock wave, the pressure distribution, and the position of shock front in gauge layer were determined by fitting Raman spectra of anthracene using the Raman peak shift simulation. And, the velocity of shock wave was calculated by the time-dependent position of shock front.