Four sequences laser shadowgraph for the visualization of hypervelocity impact debris cloud

Four sequences laser shadowgraph system has been set up on the hypervelocity im-pact range of Hypervelocity Aerodynamics Institute, CARDC, to visualize the hypervelocity im-pact debris cloud. The system includes YAG laser source, shadowgrapher and imaging system. Satisfying debris cloud image, with impact velocities up to 4. 6km/s, was obtained with the tech-nique of multi-light source divided in space, polarization decomposition, light angle magnification and compensated filter, etc.. Contents introduced in this paper are the principle, the debug of the system and the result of test. Test results show that: (1) Four images of hypervelocity impact debris cloud are gotten at different time which least interval is 1s and time of exposure is 10ns, which satisfies the need of photo of the debris cloud for the research of hypervelocity impact; (2) Eight sequences laser shadowgraph system could be developed at the base of the four sequences laser shadowgraph system, and the system can be used in the field of other hypervelocity process.