Rigorous temperature analysis for colored and Fe-bearing minerals

ORAL

Abstract

Colored and iron (Fe)-bearing minerals pose a unique challenge to taking temperature measurements in shock experiments. The uneven absorption across the visible spectrum and added reflectivity from Fe require additional corrections and considerations. We correct for wavelength-dependent absorption and then use a Monte Carlo calculation to fit a multi-wavelength solution for Sandia Z machine Streaked Visible Spectroscopy (SVS) measurements on Fe-free and Fe-bearing enstatite ((Mg,Fe)SiO3) and on pyrolite (~(Mg,Fe)2SiO4 + (Mg,Fe)SiO3). These results are compared to temperature measurements on the OMEGA-EP Streaked Optical Pyrometry (SOP) system to determine how well results from these facilities correlate considering their different specializations. We observed good temperature agreement between Z and OMEGA within error.

*This work was supported by NNSA DOE grants DE-NA0004084, DE-NA0003904; Center for Matter under Extreme Conditions (DOE grant DE-NA0003842); Center for Matter at Atomic Pressures (NSF PHY-2020249); and Sandia Z Fundamental Science Program.Part of this work was performed under the auspices of the U.S. DOE by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344.SNL is managed by NTESS, LLC under contract DE-NA0003525. This work describes objective technical results and analysis. Any subjective views or opinions that might be expressed in the work do not necessarily represent the views of the U.S. Department of Energy or the United States Government.

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Publication: Bethany A. Chidester, Marius Millot, Kaitlyn Amodeo, Dylan K. Spaulding, Patricia Kalita, Seth Root, Dayne Fratanduono, Sarah T. Stewart, Stein B. Jacobsen. The shock Hugoniot of Fe-free and Fe-bearing enstatite to 1.7 TPa. In Preparation.

Presenters

  • Kaitlyn M Amodeo

    • University of California, Davis

Authors

  • Kaitlyn M Amodeo

    • University of California, Davis

  • Bethany A Chidester

    • Los Alamos National Laboratory

  • Marius Millot

    • LLNL
    • Lawrence Livermore National Lab

  • Dylan K Spaulding

    • University of California, Davis

  • Pat Kalita

    • Sandia National Laboratories

  • Seth Root

    • Sandia National Laboratories

  • Dayne Fratanduono

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Lab

  • Stein B Jacobsen

    • Harvard

  • Razvan Caracas

    • Univ Lyon I UA 442 CNRS

  • Margaret F Huff

    • Lab for Laser Energetics

  • James Badro

    • Institut de Physique du Globe de Paris

  • Sarah T Stewart

    • University of California, Davis