Novel studies of magnetized ions and electrons in shock-driven exploding pusher experiments

POSTER

Abstract

We present an experimental investigation of how the implosion symmetry and dynamics of a laser-generated high-energy-density (HED) plasma is affected by a 25-50 T applied magnetic field. In this novel regime, both the ions (χi ~ 1) and electrons (χe >> 1) are magnetized, limiting their mobility perpendicular to the magnetic field because of their gyroradius rather than their mean free path. D3He gas-filled glass capsules were illuminated using a pole-heavy, 16.5 kJ, 1 ns laser pulse at OMEGA. 25 T and 50 T magnetic fields generated by the magneto-inertial fusion electrical discharge system (MIFEDS) were applied to these implosions. Time-resolved, spatially-resolved and integrated x-ray and nuclear measurements were made to study how magnetization affects electron-heat conduction in the plasma core and corona, kinetic ion physics, ion viscosity, and plasma instability and mix. Preliminary results suggest that the suppressed electron heat conduction causes a higher electron temperature (Te) and a steeper Te profile, and that the increased implosion asymmetry from the magnetic field increases the burn duration. Interpretation of the experiment is guided by 2D GORGON simulations.

*This work is partially supported by the DOE, the MIT/NNSA CoE, NLUF, and LLE.

Presenters

  • Cody W Chang

    • Massachusetts Institute of Technology MI
    • Massachusetts Institute of Technology

Authors

  • Cody W Chang

    • Massachusetts Institute of Technology MI
    • Massachusetts Institute of Technology
  • Arijit Bose

    • University of Delaware
    • U Delaware
  • Christopher A Walsh

    • Lawrence Livermore National Laboratory
    • LLNL
    • Lawrence Livermore Natl Lab
  • Jonathan L Peebles

    • Laboratory for Laser Energetics
    • University of Rochester
    • Laboratory for Laser Energetics, University of Rochester
  • Vladimir Y Glebov

    • Lab for Laser Energetics
    • University of Rochester
    • Laboratory for Laser Energetics, University of Rochester
  • Patrick J Adrian

    • Massachusetts Institute of Technology (MIT)
    • MIT
    • Massachusetts Institute of Technology
  • Graeme D Sutcliffe

    • Massachusetts Institute of Technology
  • Tucker E Evans

    • Massachusetts Institute of Technology MI
    • Massachusetts Institute of Technology
  • Maria Gatu-Johnson

    • MIT
    • Massachusetts Institute of Technology MI
    • Massachusetts Institute of Technology
  • Chikang Li

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology
  • Fredrick H Seguin

    • Massachusetts Institute of Technology MIT
  • Richard D Petrasso

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology
  • Johan A Frenje

    • Massachusetts Institute of Technology MIT
    • PSFC, MIT
    • MIT
    • Massachusetts Institute of Technology