Hohlraum Designs for High Velocity Implosions on NIF Hohlraum Designs for High Velocity Implosions on NIF

Abstract. In this paper, we compare experimental shock and capsule trajectories to design calculations using the radiation-hydrodynamics code hydra. The measured trajectories from surrogate ignition targets are consistent with reducing the x-ray flux on the capsule by about 85 %. A new method of extracting the radiation temperature as seen by the capsule from x-ray intensity and image data shows that about half of the apparent 15 % flux deficit in the data with respect to the simulations can be explained by hydra overestimating the x-ray flux on the capsule