Imaging velocity interferometer system for any reflector based on Shenguang-Ⅲ prototype laser facility

The active precision diagnosis technique for shock wave with two-sensitivity is a critical technology in inertial confined fusion (ICF). The main purpose is to diagnose the shock-timing trace generated by the shaped laser pulse. The imaging velocity interferometer system for any reflector (VISAR) is introduced in this paper. Some important techniques are provided, including the probe laser with single mode and shaped capability, imaging technique with high resolution and calibration character. The new target design can be widely used after analyzing the interaction of laser and target. The new flood algorithm with high confidence is programmed. The space resolution of the imaging VISAR is 5 m , and the time resolution is 10-30 ps. The uncertainty is less than 2%, which has reached the international level. The multi-shocks in transparent material can be continuously measured with this interferometer system.