%ATemporal, M
%AAtzeni, S
%D1991
%I; ENEA, Frascati (Italy)
%J
%K70 PLASMA PHYSICS AND FUSION TECHNOLOGY, ION BEAM TARGETS, RADIATION QUALITY, HEAVY ION FUSION REACTIONS, HEAVY IONS, CAPSULES, COVERINGS, GEOMETRY, THREE-DIMENSIONAL CALCULATIONS, INERTIAL CONFINEMENT, SYMMETRY, ENERGY ABSORPTION, 700411, INERTIAL CONFINEMENT DEVICES
%PMedium: X; Size: 35 p.
%T3-D study of radiation symmetrization in some indirectly driven heavy ion ICF targets
%XSymmetrization of the radiation field inside hohlraum targets for indirectly driven heavy ion beam inertial confinement fusion (ICF) is investigated numerically. The considered targets consist of a casing, enclosing the spherical fuel capsule, and a few cylindrical radiators, schematically representing ion beam irradiated converters. Radiation absorption and remission is dealt with as in the paper by Murakami and Meyer-ter-Vehn, but with the geometry extended to 3-D, and with consideration for the finite size of the radiators. It is found that, for practical casing-to-capsule area ratios (of the order of 10) and converter aspect ratios, two converters cannot provide the uniformity required for ICF. A spherical casing with six converters (placed in couples along the axes of a cartesian coordinate system) could instead illuminate a capsule with non-uniformity well below 2%, which could satisfy the ICF requirements. The effects of changing the area ratio, the size and position of the converters and the geometry of hohlraum are also discussed.
%0Technical Report
Italy Other: ON: DE93758937; TRN: 93:000042 ITAN English