Line-imaging and framing plane-imaging velocity interferometer for laser driven flyer diagnostics

A potential of line and plane imaging velocity interferometer system for any reflector (VISAR) in hypervelocity impact study was exampled by velocity filed measurement of laser driven flyer. A streak camera and a framing camera were simultaneously used to captures the comb fringe, which allows to measure the velocity histories of different points along line segments and to measure velocity field across a plane at several times. A spatial resolution better than 10 m and a velocity resolution of 15 m/s were realized. The technique was employed to measure a temporal-spatial velocity field of Al foils flyer driven by a pulse laser, and to reveal the continuous evolution of flyers. These results demonstrate that the line and plane imaging VISAR can yield reliable experimental data for theoretical study and mathematical simulation of laser driven flyer or hypervelocity impact.