成像型任意反射面速度干涉仪是激光驱动冲击波研究的重要诊断设备,主要应用于惯性约束聚变脉冲整形实验、高压状态方程实验研究和材料特性研究。基于传统任意反射面速度干涉仪的特点,研制了一台基于神光Ⅲ原型装置的成像型任意反射面速度干涉仪,该系统可用于测量自由面速度及透明介质中的冲击波速度。给出了成像型任意反射面速度干涉仪的详细设计要点。对系统性能进行了分析及测试,结果表明时间分辨优于30 ps,物方空间分辨约为10 μm,测速范围为6-45 km/s。

Imaging velocity interferometer system for any reflector (VISAR) is an important diagnostic tool for a variety of experiments involving laser-driven shock-wave propagation,including pulse shaping tool experiments for inertial confinement fusion research,high-pressure state equation experiments and materials characterization experiments.On the basis of conventional VISAR,an imaging VISAR has been implemented at the shenguang-Ⅲ prototype.Making use of the imaging VISAR,velocity of free surface and shock wave traveling through transparent media can be measured.The key points in designing an imaging VISAR are described in detail.Analyzing and testing the capability of the imaging VISAR indicate that the instrumen′s temporal resolution is 30 ps,spatial resolution about 10 μm,and velocity can be measured over the range from 6-45 km/s.