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.

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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