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Extracting Transport Properties of Turbulent and Magnetized Plasmas using Thomson scattering

ORAL

Abstract

In conventional gases and plasmas, the coefficient of thermal conduction is given by Spitzer's theory, which assumes that heat fluxes are proportional to temperature gradients. However, experimental work which recreated astrophysical conditions at the Laboratory for Laser Energetics' (LLE) OMEGA and Lawrence Livermore National Laboratory's National Ignition Facility (NIF) demonstrated that the presence of turbulent-dynamo-amplified magnetic fields in large magnetic Prandtl number regimes lead to an observed reduction of heat transport by at least two orders of magnitude. This effect was inferred using line-integrated X-ray emission diagnostics. This work presents new optical Thomson scattering data where time-resolved ion acoustic wave (IAW) and electron plasma wave (EPW) scattering was performed on NIF and OMEGA. Thomson scattering provides detailed information on the small-scale plasma conditions, improving the accuracy of line-integrated X-ray emission analysis. In addition, the autocorrelation analysis of the Thomson scattering data can yield information on relevant transport properties, such as thermal diffusion, furthering understanding of the mechanisms that give rise to the suppression of heat conduction.

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Presenters

  • Hannah Poole

    University of Oxford

Authors

  • Hannah Poole

    University of Oxford

  • Archie F Bott

    University of Oxford

  • Charlotte A Palmer

    Queen's University Belfast

  • Petros Tzeferacos

    University of Rochester

  • Kasper Moczulski

    University of Rochester

  • Dustin H Froula

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

  • Joseph D Katz

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

  • Anthony Scopatz

    University of Rochester

  • Nicolas Lopez

    University of Oxford

  • Steven S Ross

    Lawrence Livermore Natl Lab, LLNL, Lawrence Livermore National Laboratory

  • Hye-Sook Park

    LLNL

  • Yingchao Lu

    University of Rochester

  • Adam Reyes

    University of Rochester

  • George F Swadling

    Lawrence Livermore Natl Lab

  • Colin Bruulsema

    Lawrence Livermore Natl Lab, Lawrence Livermore National Laboratory, LLNL

  • Jena Meinecke

    University of Oxford

  • Alexander A Schekochihin

    University of Oxford

  • Don Q Lamb

    University of Chicago

  • Sean P Regan

    Laboratory for Laser Energetics, University of Rochester

  • Gianluca Gregori

    University of Oxford