J. Phys. IV France
Volume 133, June 2006
Page(s) 379 - 383
Publié en ligne 16 juin 2006
Inertial Fusion Sciences and Applications 2005
J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 379-383

DOI: 10.1051/jp4:2006133076

Low-adiabat implosions for fast-ignition inertial confinement fusion

R. Betti and C. Zhou

Fusion Science Center for Extreme States of Matter and Fast Ignition Physics, Laboratory for Laser Energetics, University of Rochester, 250 E. River Rd., Rochester, NY 14623-1299, USA

A method to assemble thermonuclear fuel for fast ignition with high densities, high $\rho R$, and a small size hot spot is presented. Massive cryogenic shells can be imploded with a low implosion velocity VI on a low adiabat $\alpha $ using the relaxation-pulse technique. While the low VI yields a small hot spot, the low $\alpha $ leads to large peak values of the density and areal density. It is shown that a 750-kJ laser can assemble fuel with $V_{I}\cdot 1.7\times 10^{7}$ cm/s, $\alpha \cdot 0.7$, $\rho \cdot 400$ g/cc, $\rho R \cdot 3$ g/cm2, and hot-spot volume less than 10% of the compressed core. If ignited, this fuel assembly can produce yields up to $5\times 10^{19}$ of interest to IFE applications.

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