Pressure enhancement by conically convergent shocks in composite cylinders and its application to shock recovery experiments

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Abstract
Pressure enhancement due to conically convergent shocks is experimentally demonstrated in the composite cylinder assembly made of materials with different shock velocities and shock impedances. The formation of the Mach configuration leads to a remarkable energy accumulation in the central part of the composite cylinder. The shock pressure achieved in the 2024 Al-copper assembly is 122.5 GPa with an impact velocity of 2.1 km/s of copper flyer, which is about 2.4 times greater than that expected from the standard shock condition. The application of the technique to recovery experiments for shock-loaded materials in the megabar range is proved to be successful.

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