Application of cross-beam energy transfer to control drive symmetry in CH, ICF implosions with a medium gas fill Hohlraum at the NIF

ORAL

Abstract

We present a demonstration of stagnated core symmetry control using a 1 {\AA} wavelength difference between inner and outer drive beams at the National Ignition Facility. Application of a wavelength difference utilizes the process of Cross-Beam Energy Transfer to increase the x-ray drive incident on the waist of the ICF capsule, producing symmetry control in implosions with a plastic ablator. We show these findings over seven experiments by comparing the case of no wavelength difference, $\Delta \lambda =$0 {\AA}, to that of $\Delta \lambda \quad =$ 1{\AA}. We experimentally show implosion symmetry control of \textasciitilde 24 um in Legendre mode 2 (P2) symmetry, based on experimental playbooks this corresponds to a 25{\%} increase of inner beam drive at the waist of the hohlraum.

*Prepared by LLNL under Contract DE-AC52 07NA27344. LLNL-ABS-779872

Authors

  • L. A. Pickworth

    • LLNL
    • Lawrence Livermore National Lab
  • J. Ralph

    • Lawrence Livermore National Lab
  • T. Doppner

    • Lawrence Livermore National Lab
  • D. E. Hinkel

    • Lawrence Livermore National Lab
  • B. Bachmann

    • Lawrence Livermore National Lab
  • L. Masse

    • Lawrence Livermore National Lab
  • H. Chen

    • Lawrence Livermore National Lab
  • J. Park

    • Lawrence Livermore National Lab
  • M. Hohenberger

    • Lawrence Livermore National Lab
  • A. Moore

    • Lawrence Livermore National Lab
  • L. R. Benedetti

    • Lawrence Livermore National Lab
  • S. Khan

    • Lawrence Livermore National Lab
  • D. Mariscal

    • Lawrence Livermore National Lab
  • M. Schneider

    • Lawrence Livermore National Lab
  • N. Lemos

    • Lawrence Livermore National Lab
  • L. Divol

    • Lawrence Livermore National Lab
  • P. A. Michel

    • Lawrence Livermore National Lab
  • D. Callahan

    • Lawrence Livermore National Lab
  • O. Hurricane

    • Lawrence Livermore National Lab