High-areal-density fuel assembly in direct-drive cryogenic implosions

The first observation of ignition-relevant areal-density deuterium from implosions of capsules with cryogenic fuel layers at ignition-relevant adiabats is reported. The experiments were performed on the 60-beam, 30-kJUV OMEGA Laser System [T. R. Boehly, Opt. Commun. 133, 495 (1997)10.1016/S0030-4018...

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Bibliographic Details
Published in:Physical review letters 2008-05, Vol.100 (18), p.185006-185006
Main Authors: Sangster, T C, Goncharov, V N, Radha, P B, Smalyuk, V A, Betti, R, Craxton, R S, Delettrez, J A, Edgell, D H, Glebov, V Yu, Harding, D R, Jacobs-Perkins, D, Knauer, J P, Marshall, F J, McCrory, R L, McKenty, P W, Meyerhofer, D D, Regan, S P, Seka, W, Short, R W, Skupsky, S, Soures, J M, Stoeckl, C, Yaakobi, B, Shvarts, D, Frenje, J A, Li, C K, Petrasso, R D, Séguin, F H
Format: Article
Language:English
Subjects:
CAPSULES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DENSITY
DEUTERIUM
FUEL ASSEMBLIES
IMPLOSIONS
NEUTRONS
PULSES
SIMULATION
THERMONUCLEAR IGNITION
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Summary:The first observation of ignition-relevant areal-density deuterium from implosions of capsules with cryogenic fuel layers at ignition-relevant adiabats is reported. The experiments were performed on the 60-beam, 30-kJUV OMEGA Laser System [T. R. Boehly, Opt. Commun. 133, 495 (1997)10.1016/S0030-4018(96)00325-2]. Neutron-averaged areal densities of 202+/-7 mg/cm2 and 182+/-7 mg/cm2 (corresponding to estimated peak fuel densities in excess of 100 g/cm3) were inferred using an 18-kJ direct-drive pulse designed to put the converging fuel on an adiabat of 2.5. These areal densities are in good agreement with the predictions of hydrodynamic simulations indicating that the fuel adiabat can be accurately controlled under ignition-relevant conditions.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.100.185006