Development of Single-Shot Multi-Frame Imaging of Cylindrical Shock Waves in a Multi-Layered Assembly

TL;DR

This paper introduces a novel single-shot multi-frame imaging technique for visualizing and analyzing cylindrically converging shock waves in multi-layered targets, revealing new interface effects and wave structures.

Contribution

The work develops a new tabletop imaging method using Fabry-Perot cavities for multi-frame visualization of shock waves, enabling detailed analysis of interface effects and wave coupling.

Findings

Visualized shock propagation with up to 16 images per shot

Identified coupled wave structures caused by interface effects

Demonstrated technique's potential for large-scale shock experiments

Abstract

We demonstrate single-shot multi-frame imaging of quasi-2D cylindrically converging shock waves as they propagate through a multi-layer target sample assembly. We visualize the shock with sequences of up to 16 images, using a Fabry-Perot cavity to generate a pulse train that can be used in various imaging configurations. We employ multi-frame shadowgraph and dark-field imaging to measure the amplitude and phase of the light transmitted through the shocked target. Single-shot multi-frame imaging tracks geometric distortion and additional features in our images that were not previously resolvable in this experimental geometry. Analysis of our images, in combination with simulations, shows that the additional image features are formed by a coupled wave structure resulting from interface effects in our targets. This technique presents a new capability for tabletop imaging of shock waves that can be easily extended to experiments at large-scale facilities.