Sound Velocity in Shocked Iron to ~2500 GPa

ORAL

Abstract

Measurements of the sound speed in a shock-compressed material have long been sought because they provide important information about the thermodynamic derivative in the equation of state of that material at high pressure. Specifically, constraining the sound speed in iron at high pressures can be useful to planetary science and geophysics to understand core formation and dynamo physics. We present measurements of shock‑compressed iron sound speed to pressures of 400 to 2500 GPa using a novel nonsteady wave-analysis technique[1] to infer sound speed from the relative arrival times of pressure perturbations that transited the shocked iron and an adjacent reference material. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0001944.


[1] D. E. Fratanduono et al., J. Appl. Phys. 116, 033517 (2014).

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Presenters

  • Margaret Huff

    Univ of Rochester, University of Rochester, Laboratory for Laser Energetics

Authors

  • Margaret Huff

    Univ of Rochester, University of Rochester, Laboratory for Laser Energetics

  • D E Fratanduono

    Lawrence Livermore Natl Lab

  • Chad A McCoy

    Sandia Natl Labs

  • Peter M Celliers

    Lawrence Livermore Natl Lab, Lawrence Livermore National Lab, Lawrence Livermore National Laboratory, Lawrence Livermore National Laboratory, Livermore, California

  • L. E Crandall

    Univ of Rochester, Laboratory for Laser Energetics, U. of Rochester

  • Brian Joseph Henderson

    Univ of Rochester, University of Rochester, LLE, Laboratory for Laser Energetics, U. of Rochester

  • Mohamed Zaghoo

    Univ of Rochester, University of Rochester, LLE, Laboratory for Laser Energetics, Laboratory for Laser Energetics, U. of Rochester

  • J H Henry Eggert

    Lawrence Livermore Natl Lab

  • Gilbert W Collins

    University of Rochester, Departments of Mechanical Engineering, Physics and Astronomy, and Laboratory for Laser Energetics, Laboratory for Laser Energetics, Univ of Rochester, Laboratory for Laser Energetics, U. of Rochester, Univ of Rochester, Laboratory for Laser Energetics, University of Rochester, University of Rochester, Laboratory for Laser Energetics

  • James Ryan Rygg

    Laboratory for Laser Energetics, Univ of Rochester, Laboratory for Laser Energetics, U. of Rochester, University of Rochester, University of Rochester, Laboratory for Laser Energetics, Univ of Rochester, Univ of Rochester