Shock-Compressed Methane to 400 GPa

POSTER

Abstract

Methane plays an important role in planetary physics and is a major constituent of giant planet atmospheres. Methane is predicted to have an intricate phase diagram at high pressures, including the conditions inside planet interiors.\footnote{ M. Ross, Nature \textbf{292}, 435 (1981).\par $^{\mathrm{2}}$ M. Ross and F. Rogers, Phys. Rev. B \textbf{74}, 024103 (2006).\par $^{\mathrm{3}}$ G. Gao \textit{et al.}, J. Chem. Phys. \textbf{133}, 144508 (2010).}$^{\mathrm{-3}}$ We present shock-compression data to 400~GPa for methane. The methane samples were precompressed in a diamond-anvil cell to access a broader range of extreme conditions. Data are referenced to a quartz standard. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856, the University of Rochester, and the New York State Energy Research and Development Authority.

Authors

  • G. Tabak

    • Laboratory for Laser Energetics, University of Rochester, USA

  • T. R. Boehly

    • Laboratory for Laser Energetics, University of Rochester, USA

  • G. W. Collins

    • Laboratory for Laser Energetics, University of Rochester, USA

  • L. Crandall

    • Laboratory for Laser Energetics, University of Rochester, USA

  • B. J. Henderson

    • Laboratory for Laser Energetics, University of Rochester, USA

  • J. R. Rygg

    • Laboratory for Laser Energetics, University of Rochester, USA

  • M. Zaghoo

    • Laboratory for Laser Energetics, University of Rochester, USA

  • M. Millot

    • Lawrence Livermore National Laboratory, USA

  • S. Ali

    • Lawrence Livermore National Laboratory, USA

  • P. M. Celliers

    • Lawrence Livermore National Laboratory, USA

  • J. H. Eggert

    • Lawrence Livermore National Laboratory, USA

  • D. E. Fratanduono

    • Lawrence Livermore National Laboratory, USA

  • S. Hamel

    • Lawrence Livermore National Laboratory, USA

  • A. Lazicki

    • Lawrence Livermore National Laboratory, USA

  • D. C. Swift

    • Lawrence Livermore National Laboratory, USA

  • S. Brygoo

    • CEA, France

  • P. Loubeyre

    • CEA, France

  • R. Kodama

    • Osaka University, Japan

  • K. Miyanishi

    • Osaka University, Japan

  • T. Ogawa

    • Osaka University, Japan

  • N. Ozaki

    • Osaka University, Japan

  • T. Sano

    • Osaka University, Japan

  • R. Jeanloz

    • University of California, Berkeley, USA

  • D. G. Hicks

    • Swinburne University of Technology, Australia