Progress on the magnetized ignition experimental platform for the National Ignition Facility
ORAL
Abstract
Magnetizing the DT fuel in an inertial confinement fusion (ICF) indirect drive (ID) target is expected to increase the ion temperature by > 0.5 keV and the neutron yield by > 50% relative to unmagnetized fuel due to reduced electron thermal conduction and alpha particle trapping. A magnetized ID project at NIF is underway and has started applying a ~ 25 T seed field to D2 gas-filled capsules in a Au:Ta high electrical resistivity hohlraum to quantify the B-field effects in these room temperature implosions and compare with modeling predictions. Ice-layered DT implosions will follow and require a new pulser design and a modified DT ice layer growth strategy. We will describe the status of the experiments and the project plan.
*This work was performed under the auspices of the U.S. Department of Energy by LLNL under Contract DE-AC52-07NA27344 and LDRD project SI-2020-002.
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Publication: J. D. Moody et al., "Transient magnetic field diffusion considerations relevant to magnetically assisted indirect drive inertial confinement fusion," Phys. Plasmas 27, 112711 (2020).
L. B. Bayu Aji et al., "Sputtered Au–Ta films with tunable electrical resistivity," J. Phys. D 54, 075303 (2020).
Presenters
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John D Moody
- Lawrence Livermore National Laboratory
- Lawrence Livermore Natl Lab
- LLNL
- Lawrence Livermore National Lab