The results are given of measuring the distributions of velocity and density in high-speed (1. 7- 4 km/s) shock-induced particle flows ejected from the free surface of tin and copper liners into a vacuum (less {10^3} Pa) or nitrogen ({10^5} and 8 {10^5} Pa). On the surface of the liners, periodically repeating triangular grooves with a depth of 50 and a width of 250 μm were applied (2{a₀}/ = 50/250 μm). The experiments used multiframe registration using synchrotron radiation and laser heterodyne interferometry. Pressure of 1pt 45 GPa in the shock waves reaching the free surfaces of the liners caused the tin to melt, while the copper remained in a solid state. There is a significant difference in the structure of the flows ejected from the surface of copper and tin liners, and the speed of their deceleration in gas.
Antipov et al. (Sun,) studied this question.