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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.

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