An ICF Mix Model with Experimental Input

A buoyancy drag type mix model is adapted to the study of mix in the deceleration phase of an ICF capsule. The time dependent Atwood number and acceleration are essential inputs to the model. A range of values for these parameters reflecting experimental data and 1D simulations are studied. The simulations are based on HYDRA, FLASH and the Stony Brook code FronTier. Physical quantities from HYDRA at deceleration time provide inputs to the other simulations. Time dependent density profiles and accelerations taken from HYDRA simulations suggest only a minor level of mix for the deceleration phase. Results from FLASH and FronTier simulations with modified input and having an Atwood number closer to experiment at the time of maximum neutron production, suggest a significant level of mixing.