Study of Shock-Induced Flows of Tin and Copper Particles in Vacuum and Gaseous Environments Using Synchrotron Radiation

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 10³ Pa) or nitrogen ( 10⁵ and 8 × 10⁵ Pa). On the surface of the liners, periodically repeating triangular grooves with a depth of 50 and a width of 250 μm were applied ( 2a₀/λ = 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.