Determining the spatially resolved hot-spot conditions of Kr-doped implosions at the National Ignition Facility

ORAL

Abstract

Inertial confinement fusion implosions at the National Ignition Facility (NIF) have achieved significant alpha-particle self-heating. The ion temperatures inferred from deuterium-tritium (DT) reactions are higher than predicted by theory or simulations with a leading hypothesis for those high inferences being residual kinetic energy in the hot spot in the form of fluid velocity flows and turbulence. Due to the high thermal velocity of electrons, electron temperature measurements are not sensitive to residual kinetic energy effects. The Mass-Temperature Distribution using Spectroscopy (MTDS) platform at the NIF is designed to characterize the hot-spot electron temperature and electron density using a combination of x-ray spectroscopy and x-ray imaging. We present experimental results from the MTDS platform, demonstrating the ability to constrain the spatially resolved hot-spot profile using Markov Chain Monte Carlo analysis of multiple independent diagnostics.

*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 supported by Laboratory Directed Research and Development (LDRD) Grant No. 18-ERD-015.

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Presenters

  • Michael J MacDonald

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

Authors

  • Michael J MacDonald

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

  • D.B. Thorn

    • Lawrence Livermore Natl Lab
    • LLNL

  • Benjamin Bachmann

    • Lawrence Livermore Natl Lab
    • LLNL

  • Manfred L Bitter

    • Princeton Plasma Physics Laboratory

  • Eduard L Dewald

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • P.C. C Efthimion

    • Princeton Plasma Physics Laboratory
    • PPPL

  • Lan Gao

    • Princeton Plasma Physics Laboratory
    • PPPL
    • Princeton University

  • Ming F Gu

    • University of California, Berkeley

  • Kenneth W Hill

    • Princeton University
    • Princeton Plasma Physics Laboratory

  • Joseph D Kilkenny

    • General Atomics

  • Brian F Kraus

    • Princeton Plasma Physics Laboratory
    • PPPL
    • Princeton Plasma Physics Laboratory (PPPL), USA

  • Keith LeChien

    • Lawrence Livermore Natl Lab

  • Duane A Liedahl

    • Lawrence Livermore Natl Lab
    • LLNL

  • Andrew G MacPhee

    • Lawrence Livermore Natl Lab
    • LLNL

  • Yitzhak Maron

    • Weizmann Institute of Science

  • Pravesh K Patel

    • Lawrence Livermore Natl Lab

  • Howard A Scott

    • Lawrence Livermore Natl Lab

  • Charles B Yeamans

    • Lawrence Livermore Natl Lab
    • LLNL
    • Lawrence Livermore National Lab
    • Lawrence Livermore Natl. Lab

  • Marilyn B Schneider

    • Lawrence Livermore Natl Lab
    • LLNL