Comparison of capsule deformations induced by radiation asymmetries in spherical and cylindrical hohlraums lighted by the laser MégaJoule

Abstract
The nominal configuration of inertial confinement fusion with the Laser MégaJoule (LMJ) uses a cylindrical hohlraum with two polar holes for the entrance of 60 laser quads. But the LMJ facility makes it possible to use a spherical hohlraum with more than two holes. We have studied two alternate configurations, in which 56 and 44 laser quads enter a spherical hohlraum through four and six holes respectively, with the same wall surface as in the nominal cylindrical hohlraum. We have estimated the intrinsic and random radiation asymmetries on the nominal capsule A1040 in these two configurations.