Structural Dynamics at High-Strain Rate in Solid Studied with Time-Resolved X-Ray Diffraction Using Synchrotron Source

Abstract

In this article, we describe some of our studies which exploit time-resolved X-ray measurement using the X-ray pulse of synchrotron source and nanosecond laser pulse to investigate the real-time structural change of shocked material around Hugoniot Elastic Limit (HEL). Dynamics of lattice response, deformation, and elastic-plastic transition of solid under high-strain rate has not been well known, because the shock compression is an irreversible and extreme phenomena in a short time scale. We measured the lattice response of shocked CdS single crystal under anomalous elastic compression and the intermediate structural change of elastic shock-compressed silica glass using time-resolved X-ray diffraction and scattering. We have also developed sub-nanosecond time-resolved X-ray measurement system using high-power Nd:Glass laser in order to measure a lattice response in an elastic-plastic transition.