The characteristics of laser‐driven shock wave investigated by time‐resolved Raman spectroscopy
The characteristics of laser‐driven shock wave investigated by time‐resolved Raman spectroscopy
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DOI：
10.1002/jrs.2708
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发表时间：
2011-03
影响因子：
2.5
通讯作者：
Yunfei Song;Xian-xu Zheng;Guoyang Yu;Jun Zhao;Li-lin Jiang;Yuqiang Liu;Bin Yang;Yanqiang Yang
中科院分区：
文献类型：
--
作者：
Yunfei Song;Xian-xu Zheng;Guoyang Yu;Jun Zhao;Li-lin Jiang;Yuqiang Liu;Bin Yang;Yanqiang Yang
提出了一种准确而简单的确定激光驱动冲击波特性的方法--拉曼峰位移法。利用拉曼峰在高压下移动的原理和规范层中的压力分布，可以数值模拟拉曼峰的轮廓。结合时间分辨拉曼光谱，确定了冲击波的一些主要特征。在实验中，使用了多晶菲作为压力计。利用泵浦探测技术获得了在冲击载荷作用下菲的时间分辨拉曼光谱。通过对实验频谱的数值模拟，确定了冲击波速度、峰值压力和激波前沿上升时间。结果表明，拉曼峰位移模拟方法是获得激光驱动冲击波特性的有效方法。版权所有©2010 John Wiley&Sons，Ltd.
An accurate and simple method, Raman peak-shift simulation, is proposed to determine the characteristics of a laser-driven shock wave. Using the principle of the Raman peaks shifting at high pressure and the pressure distribution in the gauge layer, the profile of the Raman peak can be numerically simulated. Combined with time-resolved Raman spectroscopy, some main characteristics of the shock wave were determined. In the experiment, polycrystalline anthracene was used as the pressure gauge. The pump–probe technique was used to obtain the time-resolved Raman spectra of anthracene under shock loading. The velocity of the shock wave, the peak pressure and the rise time of the shock front were determined by simulating the experimental spectra numerically. The result shows that the method of Raman peak-shift simulation is effective in obtaining the characteristics of a laser-driven shock wave. Copyright © 2010 John Wiley & Sons, Ltd.