EFFECT BY RADIATIVE ENERGY TRANSPORT IN PUSHER LAYER AND TRANSPORT PROPERTY OF FUEL ON NONUNIFORM IMPLOSION OF TARGET IRRADIATED BY ION BEAM

Résumé
La compressibilité du combustible dépend fortement de son équation d'état. Les effets de nonuniformité peuvent abaisser fortement le taux de compression. Le transport d'énergie radiative dans la couche où s'effectue l'essentiel du ralentissement, homogénéise les nonuniformités de pression, lorsque la température de la couche considérée dépasse 1 keV, et que l'irradiance du pilote est supérieure à 10⁵ W/cm².

Abstract
In order to obtain a high pressure to compress DT fuel in target for ICF, momenta of pusher and fuel itself are converted to impulse. Compressibility of fuel depends strongly on its equation of state. Target is usually not illuminated by energy driver in spherically symmetric way. Nonuniform implosion decreases severely the rate of fuel compression. Radiative energy transport in pusher layer homogenizes profile of nonuniform pressure which is originated by a nonuniform deposition of driver energy, if the pusher temperature exceeds 1 keV, so that the driver intensity exceeds 10⁵ W/cm². With lower driver intensity, effects of nonuniform pusher pressure must be decreased by the target structure.