Multi-Mbar re-solidification of Pb on the nanosecond timescale at the National Ignition Facility

ORAL

Abstract

Here we present results investigating high-pressure re-solidification of molten Pb on the nanosecond timescale. We have performed a series of experiments using the TARDIS platform at the National Ignition Facility (NIF) to measure x-ray diffraction of samples dynamically compressed to multi-Mbar pressure. Samples are initially shock compressed into the molten state, which is probed with x-ray diffraction. In the same experiment, the samples are then shocklessly compressed along the adiabat set by the initial shock pressure back into the solid state, which is probed with a second x-ray diffraction measurement. We report a series of experiments that provide a new constraint on the Pb melt curve up to ~6 Mbar as well as the crystal structure just below the melt curve.

*This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under ContractDE-AC52-07NA27344.

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Presenters

  • Andrew Krygier

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab

Authors

  • Andrew Krygier

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab

  • Amy E Lazicki

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Richard G Kraus

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Joel V Bernier

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Gilbert W Collins

    • University of Rochester
    • Department of Mechanical Engineering, University of Rochester, Rochester, NY, USA. Laboratory for Laser Energetics, Rochester, NY, USA. Department of Physics and Astronomy,

  • James M McNaney

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • J. Ryan Rygg

    • University of Rochester

  • Raymond F Smith

    • Lawrence Livermore Natl Lab

  • Damian C Swift

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab

  • Christopher Wehrenberg

    • Lawrence Livermore National Laboratory
    • LLNL

  • Jon H Eggert

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory