Using hard-X-ray images of ignition hohlraums on NIF to characterize hot electrons generated by laser-plasma interaction

ORAL

Abstract

Using multi-channel hard X-ray images of an ignition hohlraum taken along two axis and the time-integrated FFLEX broadband spectrometer that measures Bremsstrahlung hard X-rays emitted in the hohlraum wall by energetic electrons, we characterize the location of hot electron generation. We distinguish two hot electron components of the spectrum: a 20 keV thermal-like component related to Stimulated Raman scattering and a ``super ho'' ($>$ 60 keV) component due to LPI at higher density. In addition, the effect of the hohlraum thermal emission (with Thot $\approx $ 2-4 keV) on this analysis will be assessed.

*This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.

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Authors

  • Laurent Divol

    • LLNL
    • Lawrence Livermore National Laboratory

  • T. Doeppner

    • Lawrence Livermore National Laboratory

  • C. Thomas

    • Lawrence Livermore National Laboratory

  • E. Dewald

    • Lawrence Livermore National Laboratory

  • H. Park

    • Lawrence Livermore National Laboratory

  • M. Schneider

    • Lawrence Livermore National Laboratory

  • G. LaCaille

    • Lawrence Livermore National Laboratory

  • P. Michel

    • Lawrence Livermore National Laboratory

  • R. Town

    • Lawrence Livermore National Laboratory

  • N. Meezan

    • Lawrence Livermore National Laboratory

  • J. Moody

    • Lawrence Livermore National Laboratory

  • J. Kline

    • Los Alamos National Laboratory

  • S. Glenzer

    • Lawrence Livermore National Laboratory

  • O. Landen

    • Lawrence Livermore National Laboratory