Next steps in solving the “Drive-Deficit” problem in modeling ICF experiments

ORAL

Abstract

Recently we have identified [1] the gold atomic data for the hohlraum coronal plasma to be the key contributor to the discrepancy between the measured and modeled radiation flux particularly for > 1.8 keV radiation. A revised model to bring the predicted radiation flux and the coronal plasma temperature into agreement with the measurement is presented. This model is shown to have partially solved the “Drive-Deficit” problem by reducing the discrepancy between the predicted and measured peak compression time (“Bang-time”) by more than half (from 300 ps to ~100 ps) [2]. The contributing factors to the remaining discrepancy are physical properties such as the equation-of-state and opacity of the capsule materials. To isolate the effect from variables experimentally, several targets are being pursued including the variations in high-Z dopant percentages and ablation materials.

[1] H. Chen et al., Phys. Rev. E 110, L013201 (2024); Phys. Plasmas 32, 042704 (2025)

[2] G. . Swadling et al., Phys. Plasmas 32, 052707 (2025); W. Farmer et al., Phys. Plasmas 32, 072709 (2025)

*This work was performed under the auspices of the U.S. Department of Energy by LLNS, LLC, under Contract No. DE-AC52- 07NA27344.

–

Presenters

  • Hui Chen

    • Lawrence Livermore National Laboratory

Authors

  • Hui Chen

    • Lawrence Livermore National Laboratory

  • Tod T Woods

    • Lawrence Livermore National Laboratory (LLNS)
    • Lawrence Livermore National Laboratory

  • William A Farmer

    • Lawrence Livermore National Laboratory

  • Nicholas Aybar

    • Lawrence Livermore National Laboratory

  • Duane A Liedahl

    • Lawrence Livermore National Laboratory

  • Steve A MacLaren

    • Lawrence Livermore National Laboratory

  • M. B. Beth Schneider

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore National Lab

  • Judy A Harte

    • Lawrence Livermore National Laboratory

  • Denise E Hinkel

    • Lawrence Livermore National Laboratory

  • Otto L Landen

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore National Lab

  • John D Moody

    • Lawrence Livermore National Laboratory

  • Mordy D Rosen

    • Lawrence Livermore National Laboratory

  • James S Ross

    • Lawrence Livermore National Laboratory
    • Livermore

  • Sonja Rogers

    • Lawrence Livermore National Laboratory

  • Nicholas Roskopf

    • Lawrence Livermore National Laboratory

  • George F Swadling

    • Lawrence Livermore National Laboratory

  • Scott Vonhoff

    • Lawrence Livermore National Laboratory

  • George B Zimmerman

    • Lawrence Livermore National Laboratory