Heat-release EOS and thermal conductivity of warm dense carbon by proton differential heating

ORAL

Abstract

Measurements of amorphous carbon thermal conductivity at 2-8 eV temperatures using differential heating platform will be presented. This platform has previously demonstrated such measurements for Al (Y. Ping et al. Phys. Plasmas, 2015; A. Mckelvey, et al. Sci. Reports 2017). A temperature gradient is induced in a Au/C dual-layer target by proton differential heating. The subsequent heat flow from the hotter Au to the carbon rear surface is detected by two simultaneous time-resolved diagnostics: streak optical pyrometry for surface temperature and Fourier domain interferometry for surface motion. The comparison between the data and 7 EOS tables shows that only one EOS model can reasonably reproduce all the data. By using a chi-square statistical analysis to quantify the comparison, the thermal conductivity model is constrained with uncertainties down to +-10%.

*This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344 with support from DOE OFES Early Career program.

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Presenters

  • Yuan Ping

    • LLNL
    • Lawrence Livermore National Laborator
    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory
    • Lawrence Livermore National Lab

Authors

  • Yuan Ping

    • LLNL
    • Lawrence Livermore National Laborator
    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory
    • Lawrence Livermore National Lab

  • Gregory Elijah Kemp

    • LLNL
    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Lab

  • Andrew McKelvey

    • LLNL, University of Michigan
    • Lawrence Livermore Natl Lab

  • Philip A Sterne

    • Lawrence Livermore Natl Lab
    • LLNL

  • Heather D Whitley

    • Lawrence Livermore Natl Lab

  • Ronnie Lee Shepherd

    • LLNL
    • Lawrence Livermore Natl Lab

  • Rui Hua

    • UCSD
    • Univ of California - San Diego
    • UC San Diego

  • Farhat N Beg

    • Univ of California - San Diego
    • Center for Energy Research, University of California, San Diego
    • UC San Diego
    • University of California, San Diego

  • J H Henry Eggert

    • Lawrence Livermore Natl Lab