一种同步研究透明材料折射率和动力学特性的实验方法

An experimental method of simultaneously studying refractive index and dynamic properties of transparent materials

基于电磁加载装置CQ-4,建立了一种同步开展透明材料折射率和高压声速测量的实验方法.完成了聚甲基丙烯酸甲酯(PMMA)窗口材料14 GPa斜波压缩实验,利用多点双光源外差位移干涉测速仪(dual laser heterodyne velocimetry,DLHV),获得了PMMA样品后表面的速度历史曲线.速度曲线表现出明显的双波结构,表明PMMA样品出现了弹塑性转变.通过实验数据处理,一发实验同步获取了PMMA的折射率-粒子速度光学特性和拉氏声速-粒子速度动力学特性.

Based on the electromagnetic loading device CQ-4,an experimental method of simultaneously measuring the refractive index and high pressure sound velocity of transparent material is established.The ramp wave compression experiment of PMMA is carried out under a pressure of 14 GPa.The velocity history curves of PMMA sample rear surface are obtained by dual laser heterodyne velocimetry(DLHV).The velocity curve shows obvious double wave structure,which indicates the elastic-plastic transition.The refractive index particle velocity optical characteristics and Lagrangian sound velocity particle velocity dynamic characteristics of PMMA are obtained simultaneously with the experimental data processing.