Accuracy examination of shock speed measurement by imaging velocity interferometer system for any reflector

Based on SG-Ⅲ prototype laser facility, an experimental method to examine the accuracy of shock speed measurement by imaging velocity interferometer system for any reflector(VISAR) was developed. The conventional double-sensitivity method leads to multiple results. Whereas, with samples of known thickness, the accurate curve of shock wave velocity and accuracy of shock speed measurement were achieved by the proposed method. Also a theoretical calculation of this system was carried out. The theoretical and experimental results agree with each other perfectly. This method can also help to acquire the number of lost fringes on single-sensitivity VISAR. With only one streak camera, the accurate curve of shock wave velocity can be achieved.