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Scaling model for high-aspect-ratio microballoon direct-drive implosions at short laser wavelengths

Published online by Cambridge University Press:  09 March 2009

Daniel Schirmann ,
Denis Juraszek ,
Stephen M. Lane  and
E. Michael Campbell
Daniel Schirmann
Affiliation:
CEL-V, Villeneuve Saint-Georges 94195 Cedex, France
Denis Juraszek
Affiliation:
CEL-V, Villeneuve Saint-Georges 94195 Cedex, France
Stephen M. Lane
Affiliation:
LLNL P.O. Box 808, Livermore, CA 94550
E. Michael Campbell
Affiliation:
LLNL P.O. Box 808, Livermore, CA 94550
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Abstract

A scaling model for hot spherical ablative implosions in direct-drive mode is presented. The model results have been compared with experiments from LLE, ILE, and LLNL. Reduction of the neutron yield due to illumination nonuniformities is taken into account by the assumption that the neutron emission is cut off when the gas shock wave reflected off the center meets the incoming pusher, i.e., at a time when the probability of shell breakup is greatly enhanced. The main advantage of this semiempirical scaling model is that it elucidates the principal features of these simple implosions and permits one to estimate very quickly the performance of a high-aspect-ratio direct-drive target illuminated by short-wavelength laser light.

Type
Research Article
Information
Laser and Particle Beams , Volume 10 , Issue 1 , March 1992 , pp. 91 - 108
Copyright
Copyright © Cambridge University Press 1992

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