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Core conditions for alpha heating attained in direct-drive inertial confinement fusion

Author(s)
Bose, A.; Woo, K. M.; Betti, R.; Campbell, E. M.; Mangino, D.; Christopherson, A. R.; McCrory, R. L.; Nora, R.; Regan, S. P.; Goncharov, V. N.; Sangster, T. C.; Forrest, C. J.; Glebov, V. Yu; Knauer, J. P.; Marshall, F. J.; Stoeckl, C.; Theobald, W.; Frenje, Johan A; Gatu Johnson, Maria; ... Show more Show less
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Abstract
It is shown that direct-drive implosions on the OMEGA laser have achieved core conditions that would lead to significant alpha heating at incident energies available on the National Ignition Facility (NIF) scale. The extrapolation of the experimental results from OMEGA to NIF energy assumes only that the implosion hydrodynamic efficiency is unchanged at higher energies. This approach is independent of the uncertainties in the physical mechanism that degrade implosions on OMEGA, and relies solely on a volumetric scaling of the experimentally observed core conditions. It is estimated that the current best-performing OMEGA implosion [Regan et al., Phys. Rev. Lett. 117, 025001 (2016)10.1103/PhysRevLett.117.025001] extrapolated to a 1.9 MJ laser driver with the same illumination configuration and laser-target coupling would produce 125 kJ of fusion energy with similar levels of alpha heating observed in current highest performing indirect-drive NIF implosions.
Date issued
2016-07
URI
http://hdl.handle.net/1721.1/110486
Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Journal
Physical Review E
Publisher
American Physical Society
Citation
Bose, A.; Woo, K. M.; Betti, R.; Campbell, E. M.; Mangino, D.; Christopherson, A. R.; McCrory, R. L.; Nora, R.; Regan, S. P.; Goncharov, V. N. et al "Core conditions for alpha heating attained in direct-drive inertial confinement fusion." Physical Review E 94, 011201(R) (July 2016): 1-5
Version: Final published version
ISSN
2470-0045
2470-0053

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