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
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Cody W Chang
- Massachusetts Institute of Technology MI
- Massachusetts Institute of Technology