Inferring the equation of state of shocked liquid deuterium

ORAL

Abstract

The equation of state of light elements is essential to understanding the structure of Jovian planets. Here we present a combination of experimental techniques used to characterize warm dense deuterium. The OMEGA laser was used to directly drive a shock wave in a planar liquid-deuterium target. The shocked D2 conditions were diagnosed using VISAR and pyrometry to obtain the shock velocity and temperature. Two shock waves were launched with velocities of 17$\pm$0.9 and 23$\pm$1.0 km/s, as a result of intensity variations in the staggered laser beam drive. Using a blackbody approximation, a temperature of 0.4 to 0.8 eV range was inferred. Various equation of state models including SESAME, PROPACEOS, DFT-MD and Saumon \& Chabrier EOS were used to obtain a range pressures (0.4-0.5 Mbar) and densities (0.65-0.88 g/cc). Differences between models will be discussed. Preliminary data from X-ray scattering, providing a direct measurement of microscopic state of the deuterium for extreme conditions not accessible with VISAR, will also be presented.

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Authors

  • K. Falk

    • U. Oxford
    • University of Oxford

  • C.D. Murphy

    • U. Oxford
    • University of Oxford

  • G. Gregori

    • University of Oxford

  • Sean Regan

    • Laboratory for Laser Energetics Rochester
    • University of Rochester/ LLE
    • University of Rochester

  • P.B. Radha

    • University of Rochester/ LLE

  • T.R. Boehly

    • LLE
    • University of Rochester/ LLE

  • M.A. Barrios

    • University of Rochester/ LLE

  • D.E. Fratanduono

    • University of Rochester/ LLE

  • S.X. Hu

    • University of Rochester/ LLE

  • D.O. Gericke

    • University of Warwick

  • J. Vorberger

    • University of Warwick

  • S. Glenzer

    • LLNL
    • Lawrence Livermore National Laboratory

  • D.G. Hicks

    • LLNL