激光速度干涉仪在大板实验中的应用研究

Application of VISAR in Bigplate Experiment

在大板实验中,为了测量不同位置飞片的运动历史,提出了测量任意反射面的速度干涉仪（VISAR）斜入射测试方法。实验时,VISAR初始测试位置X分别为0,10,20,40和80 mm,对应的测试角度β分别为0°、4.5°、7.5°、10°和11.5°。试验结果表明：各测点均获得了完整的飞片运动速度时间曲线,有效测试时间达到8~12μs。建立的VISAR斜入射测试技术是可行的。

Velocity interferometer system for any reflector（VISAR） interferometer was used in bigplate experiment to measure the movement of the flyer.The measured places of VISAR are： 0,10,20,40 and 80 mm,the corresponding angles of incidence are decided： 0°,4.5°,7.5°,10° and 11.5°.Results show that the velocity curves measured at different places are completely.The effective time of measuremnet is from 8 μs to 12 μs.VISAR testing technology with slanting incidence is feasible.