Diagnosing the hot-spot electron temperature from x-ray continnum emission measurements on NIF and OMEGA implosions

ORAL

Abstract

The hot-spot electron temperature (Te) is a key metric in determining the performance of inertial confinement fusion (ICF) implosions. The Continuum Spectrometer (ConSpec) infers hot-spot Te from the slope of the x-ray continuum emission in the photon energy range of 20 to 30 keV, where ion velocity and opacity effects are negligible. Additionally, the ConSpec provides spatial resolution to resolve background x-ray sources from the hot-spot emission. We present initial x-ray spectra, from which we infer hot-spot Te for DT cryogenic implosions at both the National Ignition Facility (NIF) and the OMEGA laser facility. In the NIF experiments, we infer the hot-spot Te from the continuum emission and measure the emission spectra from the laser deposition region near the hohlraum wall (the gold bubble). For the OMEGA direct-drive implosions, we evaluate the effectiveness of spatially resolving the hot-spot emission in the time-integrated measurement from coronal plasma emission.

*This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 and 18-ERD-015. This material is based upon work supported by the Department Of Energy National Nuclear Security Administration under Award Number DE NA0001944.

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Presenters

  • M. J. MacDonald

    • Lawrence Livermore Natl Lab

Authors

  • M. J. MacDonald

    • Lawrence Livermore Natl Lab

  • Daniel B. Thorn

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Andrew G. MacPhee

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Benjamin Bachmann

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Lab

  • David K. Bradley

    • Lawrence Livermore Natl Lab

  • Bernard Kozioziemski

    • Lawrence Livermore Natl Lab

  • Otto L Landen

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Sabrina R Nagel

    • Lawrence Livermore Natl Lab

  • Marilyn Beth Schneider

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Lab
    • Lawrence Livermore National Laboratory

  • Rahul C Shah

    • Lab for Laser Energetics
    • Laboratory for Laser Energetics
    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics, U. of Rochester
    • Lab for Laser Energetics, Univ of Rochester

  • Raymond E. Bahr

    • Lab for Laser Energetics

  • Duc M Cao

    • Lab for Laser Energetics
    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics U. of Rochester
    • Laboratory for Laser Energetics, U. of Rochester

  • Timothy Filkins

    • Lab for Laser Energetics

  • Sean P Regan

    • Univ of Rochester, Univ of Rochester
    • Univ of Rochester
    • Laboratory for Laser Energetics
    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics U. of Rochester
    • Laboratory for Laser Energetics, U. of Rochester
    • Laboratory for Laser Energetics, Rochester, New York
    • University of Rochester
    • Lab for Laser Energetics

  • Chuck Sorce

    • Laboratory for Laser Energetics, U. of Rochester
    • Lab for Laser Energetics
    • Laboratory for Laser Energetics

  • Christian Stoeckl

    • Univ of Rochester, Univ of Rochester
    • Univ of Rochester
    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics
    • Laboratory for Laser Energetics U. of Rochester
    • Lab for Laser Energetics
    • University of Rochester
    • Laboratory for Laser Energetics, U. of Rochester

  • Wolfgang R. Theobald

    • Univ of Rochester, Univ of Rochester
    • Univ of Rochester
    • Laboratory for Laser Energetics, U. of Rochester
    • Laboratory for Laser Energetics
    • University of Rochester
    • Lab for Laser Energetics

  • Joe D. Kilkenny

    • General Atomics
    • Lawrence Livermore Natl Lab