Experimental observation of nonlocal electron transport in warm dense matter

ORAL

Abstract

We present the first experimental observation of electron transport in warm dense matter using X-ray Thomson Scattering (XRTS) measurement from low-density CH foams compressed by a strong laser-driven shock at the OMEGA laser facility [1]. The XRTS measurement was combined with VISAR and optical pyrometry (SOP) providing a robust measurement of thermodynamic conditions in the shock. Evidence of significant preheat contributing to elevated temperatures reaching 17.5-35 eV in shocked CH foam was measured by XRTS. These measurements were complemented by abnormally high shock velocities observed by VISAR and early emission seen by SOP. These results were compared to radiation hydrodynamics simulations that include first-principles treatment of nonlocal electron transport in WDM with excellent agreement.

[1] K. Falk et al., Phys. Rev. Lett. 120, 025002 (2018).

*This research was supported by the US DOE/NNSA under contract no. DE-AC52- 06NA25396 and the Helmholtz Association under contract no. VH-NG-1338.

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Presenters

  • Katerina Falk

    • Helmholtz Zentrum Dresden-Rossendorf

Authors

  • Katerina Falk

    • Helmholtz Zentrum Dresden-Rossendorf

  • Milan Holec

    • Lawrence Livermore Natl Lab

  • Christopher J Fontes

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab

  • Chris L Fryer

    • Los Alamos Natl Lab

  • Carl W Greeff

    • Los Alamos Natl Lab

  • Heather M Johns

    • Los Alamos Natl Lab
    • Los Alamos National Lab

  • David S Montgomery

    • Los Alamos Natl Lab
    • Los Alamos National Laboratory

  • Derek W Schmidt

    • Los Alamos Natl Lab

  • Michal Smid

    • Helmholtz Zentrum Dresden-Rossendorf
    • Helmholtz-Zentrum Dresden-Rossendorf