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.

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Presenters

  • Shaughnessy Brown

    Mechanical Engineering, Stanford University, SLAC

Authors

  • Shaughnessy Brown

    Mechanical Engineering, Stanford University, SLAC

  • Haeja Lee

    SLAC National Accelerator Laboratory, SLAC

  • Eric Galtier

    SLAC National Accelerator Laboratory

  • Arianna Gleason

    Los Alamos National Laboratory, LANL

  • Eduardo Granados

    SLAC National Accelerator Laboratory, SLAC

  • Franz Tavella

    SLAC National Accelerator Laboratory

  • Andreas Schropp

    Deutsches Elektronen-Synchrotron

  • Frank Seiboth

    SLAC National Accelerator Laboratory

  • Christian Schroer

    Deutsches Elektronen-Synchrotron

  • Emma McBride

    SLAC National Accelerator Laboratory

  • Andrew Higginbotham

    Physics, University of York

  • Akel Hashim

    University of California, Berkeley

  • Brice Arnold

    SLAC National Accelerator Laboratory

  • Alan Fry

    SLAC National Accelerator Laboratory

  • Robert Nagler

    SLAC National Accelerator Laboratory, SLAC