Degradation of radiatively driven inertial confinement fusion capsule implosions by multifluid interpenetration mixing

Wilson, D.C.; Scannapieco, A.J.; Cranfill, C.W.; Clover, M.R.; Hoffman, N.M.; Collins, J.
November 2003
Physics of Plasmas;Nov2003, Vol. 10 Issue 11, p4427
Academic Journal
The observed degradation of radiatively driven single shell capsule yield with increasing convergence ratio can be quantitatively understood by mixing between the gaseous deuterium-tritium (DT) or deuterium (DD) and the pusher. Calculations using a multifluid interpenetration mix model can replicate the performance of experiments at the NOVA [C. Bibeau et al., Appl. Opt. 31, 5799 (1992)] and OMEGA [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] lasers, using a single fitting parameter, a mixing length ratio. When mix is similarly treated at the ablator–solid DT interface, cryogenic single shell ignition capsules for the National Ignition Facility [J. A. Paisner, E. M. Campbell, and W. J. Hogan, Fusion Technol. 26, 755 (1994)] and the Laser Mega Joule [ P. A. Holstein et al., Laser Part. Beams 17, 403 (1999)] calculate to ignite and burn with gains of several due to isolation of the ignition hot spot from the pusher material. © 2003 American Institute of Physics.


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