Initial Experimental Results of indirectly-driven ICF implosions in the I-Raum

ORAL

Abstract

A new advanced hohlraum concept, the I-Raum [1], has been experimentally tested on the NIF. Initial results show enhanced inner beam propagation compared to a typical cylindrical hohlraum. This enhanced propagation is achieved by recessing the location where the outer beam cones hit the hohlraum wall. This target modification delays when the Au wall material, driven by the outer beam cones, obstructs the inner beam and reduces propagation. X-ray images of the Au wall motion and measurements of the shape of the imploded capsule show improvements over the standard cylinder geometry. Detailed hohlraum simulations are presented in a companion talk by Robey et al.

[1] H. F. Robey et al., “The I-Raum: A new shaped hohlraum for improved inner beam propagation in indirectly-driven ICF implosions on the National Ignition Facility”, Phys Plasmas 25, 012711 (2018).

*This work was performed under the auspices of the Lawrence Livermore National Security, LLC, (LLNS) under Contract No. DE-AC52-07NA27344

–

Presenters

  • J. Steven Steven Ross

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

Authors

  • J. Steven Steven Ross

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

  • Harry Francis Robey

    • Lawrence Livermore Natl Lab

  • Hui Chen

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Nobuhiko Izumi

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore Natl Lab, Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Steve Johnson

    • Lawrence Livermore Natl Lab

  • Tammy Yee Wing Ma

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab

  • Nathan B. Meezan

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Marius Adrien Millot

    • Lawrence Livermore Natl Lab

  • John D Moody

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Alastair S Moore

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Arthur E. Pak

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Brandon Nathan Woodworth

    • Lawrence Livermore Natl Lab