Study of Shock-Induced Flows of Tin and Copper Particles in Vacuum and Gaseous Environments Using Synchrotron Radiation
M. V. Antipov, S. V. Erunov, D. N. Zamyslov, V. A. Ogorodnikov, D. A. Polshkov, A. V. Fedoseev, E. A. Chudakov
Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Nizhny Novgorod, Russia
Keywords: shock wave, dusting, nitrogen, particles, flow, density, synchrotron radiation
Abstract
The paper presents the results of measuring the velocity and density distributions in high-velocity (1.7 ÷ 4 km/s) shock-induced particle flows ejected from the free surface of tin and copper liners into vacuum (less than 103 Pa) or nitrogen (105 and 8 ⸱ 105 Pa). Periodically repeating triangular grooves 50 μm deep and 250 μm wide (2a0 / λ = 50/250 μm) were applied to the liner surfaces. Multi-frame recording using synchrotron radiation and laser heterodyne interferometry were used in the experiments. A pressure of ≈45 GPa in the shock waves emerging on the free surfaces of the liners led to the melting of tin, while copper remained in the solid state. A significant difference in the structure of the flows ejected from the surface of copper and tin liners and their deceleration velocities in the gas is observed.
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