Capsule and hohlraum design studies for a high energy NIF upgrade

Ignition was recently achieved on the NIF with 3.15 MJ yield from 2.05 MJ of laser energy (gain > 1.5). The NIF facility is evaluating potential future upgrades from the planned 2.6 MJ NIF Step 1 upgrade to further increase laser performance with the goal of robustly producing 10 MJ yields with reduced reliance on capsule quality. Two options are currently being considered, either 3.0 MJ at 450 TW (high energy) or 2.6 MJ at 600 TW (high power). We present HYDRA/HyPyd radiation-hydrodynamic simulation studies of proposed integrated hohlraum designs for the 3.0 MJ/450 TW high energy upgrade option, considering various ablator materials and drives. Robustness to low-mode asymmetry and shock de-timing will be considered.