ICF target ignition studies in planar, cylindrical, and spherical geometries

A model for nonlocal ct particle transport is implemented in a one-dimensio nal radiation hydrodynamics code and applied for typical directly and indir ectly driven ICF target simulations. Ignition criteria are compared for fou r configurations; spherical, cylindrical, planar with a central hot spot, a nd another planar configuration with a hot spot on one side. This last plan ar configuration is then used for fast ignitor studies, since it is able to simulate hot spot formation by direct laser heating and free expansion tow ards the incoming beam. Ignition requirements as a unction of laser intensi ty and pulse length, taking into account the relationship between intensity , hot electron temperature, and range, are then determined.