X-Ray Diffraction of Diamond on the Double-Shock Hugoniot

ORAL

Abstract

The high-pressure equation of state of carbon is integral to inertial confinement fusion and the modeling of gas giants such as Uranus and Neptune. Numerous studies have investigated the compression and melting curve along the principal Hugoniot, where the liquid--solid coexistence regime exists between 6 and 10 Mbar. Here we explore the secondary Hugoniot of dynamically compressed diamond using velocity interferometry and optical pyrometry. Simultaneous x-ray diffraction measurements are performed to determine the crystal structure and to detect the onset of melting at higher pressures than those accessible by a single shock. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856.

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Authors

  • Danae Polsin

    U. of Rochester's Laboratory for Laser Energetics, University of Rochester

  • Mohamed Zaghoo

    University of Rochester, Laboratory for Laser Energetics

  • Gilbert W. Collins

    Laboratory for Laser Energetics, University of Rochester

  • J. Ryan Rygg

    Laboratory for Laser Energetics, University of Rochester

  • Xuchen Gong

    University of Rochester

  • Grigory Tabak

    University of Rochester

  • Zaire Sprowal

    University of Rochester

  • Peter Celliers

    Lawrence Livermore National Laboratory

  • Dayne Fratanduono

    Lawrence Livermore National Laboratory

  • Yuan Ping

    Lawrence Livermore Natl Lab, LLNL, Lawrence Livermore National Laboratory

  • Jon Eggert

    Lawrence Livermore National Laboratory

  • Dave Munro

    Lawrence Livermore National Laboratory

  • Amy Jenei

    Lawrence Livermore Natl Lab, Lawrence Livermore National Laboratory

  • Damien Hicks

    Swinburne U. of Technology

  • Tom Boehly

    Laboratory for Laser Energetics