Mix mitigation by continuous capsule doping in high-performance implosions on the National Ignition Facility

ORAL

Abstract

Mixing of high-density carbon (HDC) ablator material with deuterium tritium fuel has long been identified as a yield degradation mechanism in implosion experiments at the National Ignition Facility (NIF). Recent high-resolution simulations suggest that the source for much of this mixing is the opacity discontinuity caused by the thin layer of tungsten dopant added to the inside of the HDC shell to control x-ray pre-heating. To mitigate this mix source, a continuous doping scheme has been proposed where the dopant ramps up in a piece-wise continuous fashion from zero to its peak concentration, flattops, and then ramps smoothly back to zero. High resolution simulations show that this substantially mitigates short-wavelength mixing and could lead to a factor of two yield enhancement for current NIF implosions. This presentation discusses the design and modeling of this continuous dopant profile. The following presentation will detail the first experimental results testing this new dopant profile on NIF.

*This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 and General Atomics under Contract 89233119CNA000063.

–

Presenters

  • Daniel S Clark

    • Lawrence Livermore National Laboratory
    • LLNL

Authors

  • Daniel S Clark

    • Lawrence Livermore National Laboratory
    • LLNL

  • Matthias Hohenberger

    • Lawrence Livermore National Laboratory

  • Sean M Hayes

    • Lawrence Livermore National Laboratory

  • Tilo Doeppner

    • Lawrence Livermore National Laboratory

  • Arthur E Pak

    • Lawrence Livermore National Laboratory

  • Andrea L Kritcher

    • Lawrence Livermore National Laboratory

  • Anthony Allen

    • General Atomics

  • Benjamin Bachmann

    • Lawrence Livermore National Laboratory

  • Salmaan H Baxamusa

    • LLNL

  • Juergen Biener

    • Lawrence Livermore National Laboratory

  • Richard Marshall Bionta

    • Lawrence Livermore National Laboratory

  • Noah Watson Birge

    • Los Alamos National Laboratory (LANL)

  • Tom Braun

    • Lawrence Livermore National Laboratory

  • Travis M Briggs

    • Lawrence Livemore National Laboratory

  • Daniel T Casey

    • Lawrence Livermore National Laboratory
    • Lawrence LIvermore National Laboratory

  • Tom D Chapman

    • Lawrence Livermore National Laboratory

  • Christopher R Danly

    • Los Alamos National Laboratory (LANL)

  • Seth Davidovits

    • Lawrence Livermore National Laboratory

  • Thomas Ralph Dittrich

    • Lawrence Livermore National Laboratory

  • Laurent Divol

    • Lawrence Livermore National Laboratory

  • Alex A Do

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Tobias Fehrenbach

    • Diamond Materials, GmbH

  • Matthew Freeman

    • Los Alamos National Laboratory (LANL)

  • Verena Geppert-Kleinrath

    • Los Alamos National Laboratory (LANL)

  • Steven W Haan

    • Lawrence Livermore National Laboratory

  • Kelly D Hahn

    • Lawrence Livermore National Laboratory

  • Kelli D Humbird

    • Lawrence Livermore National Laboratory

  • Omar A Hurricane

    • Lawrence Livermore National Laboratory

  • Maria Gatu Johnson

    • Massachusetts Institute of Technology
    • MIT Plasma Science and Fusion Center

  • Shahab Khan

    • Lawrence Livermore National Laboratory

  • Casey W Kong

    • General Atomics

  • Bernard Kozioziemski

    • Lawrence Livermore National Laboratory

  • Otto L Landen

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore National Lab

  • Xavier Lepro-Chavez

    • Lawrence Livermore National Laboratory

  • Brian James MacGowan

    • Lawrence Livermore National Laboratory

  • Steve A MacLaren

    • Lawrence Livermore National Laboratory

  • Kevin D Meaney

    • Los Alamos National Laboratory (LANL)

  • Rachel M Merlo

    • Lawrence Livermore National Laboratory

  • Alastair S Moore

    • Lawrence Livermore National Laboratory

  • Abbas Nikroo

    • Lawrence Livermore National Laboratory

  • Ryan C Nora

    • Lawrence Livermore National Laboratory

  • Joseph E Ralph

    • Lawrence Livermore National Laboratory

  • Mark Ratledge

    • General Atomics

  • David Schlossberg

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore National Lab

  • Alexander Schwartz

    • Lawrence Livermore Natl Lab

  • Michael Stadermann

    • Lawrence Livermore Natl Lab

  • Stanislav Stoupin

    • Lawrence Livermore National Laboratory

  • Clement A Trosseille

    • Lawrence Livermore National Laboratory

  • Christopher R Weber

    • Lawrence Livermore National Laboratory

  • Christopher Wild

    • Diamond Materials, GmbH

  • Carl Wilde

    • Los Alamos National Lab

  • Brandon Woodworth

    • Lawrence Livermore National Laboratory

  • Christopher V Young

    • Lawrence Livermore National Laboratory