High-Resolution Spatial and Temporal Probing of Dynamically-Compressed Silicon using X-Ray Diffraction and Imaging
ORAL
Abstract
We present the results of tunable x-ray temporal and spatial probing of silicon under laser-driven compression at the Matter in Extreme Conditions hutch of the Linac Coherent Light Source. Using simultaneous x-ray diffraction and x-ray contrast imaging diagnostics, we identify the influence of pressure on the multiple-shockwave sequence of compression, phase transition, and melt, and we compare our in-situ, dynamic results to previous static compression data and Hugoniot relations. We examine simulated and observed mechanisms for relieving high material strains ahead of plastic deformation and discuss the kinetics of multiple-shockwave formation and propagation. Lastly, we outline future work using the upgraded 60 J, high-power laser at the MEC hutch.
*The Linac Coherent Light Source, SLAC National Accelerator Laboratory is supported by the U.S. Department of Energy (DOE), Office of Basic Energy Sciences under DE-AC02-76SF00515. MEC is supported by the Office of Fusion Energy Sciences under SF00515.
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Presenters
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Shaughnessy Brown
- Mechanical Engineering, Stanford University
- SLAC