Initial 3-D HYDRA Simulations of OMEGA Cryogenic Implosions

The Laboratory for Laser Energetics continues to examine the performance of cryogenically fueled D$_{2}$ and DT direct-drive capsule implosions. Of particular concern is the interplay between the initial uniformity of the ice layer which is usually directed into a north--south attitude and the target offset nonuniformity, that is mainly an east--west perturbation. Such combinations are inherently three-dimensional in nature and have not previously been accurately examined. This paper will first present a comparison of the results from both 2-D and 3-D simulations of target offset. Additional 3-D results will then be presented examining the combined effect of target offset and ice-layer smoothness on target performance. These 3-D results will be compared with 2-D simulations to examine the differences made when approximations to 3-D perturbations are applied to the 2-D simulations. This work was supported by the U.S. Department of Energy Office of Inertial Confinement Fusion under Cooperative Agreement No. DE-FC52-08NA28302.