APS Logo

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.

–

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