Cryogenic D-T Fuel Layers Formed in 1 mm Spheres by Beta-Layering

摘要: Solid D-T fuel smoothly layered on the interior of spherical capsules is required for all inertial confinement fusion ignition target designs. One process forming these layers, beta-layering, has been studied in surrogate geometries such as open cylinders or tori to allow accurate characterization DT surfaces. We present first results from beta layering 1 mm containers, will be used upcoming Omega experiments. These are also directly relevant National Ignition Facility. find that layers can form with roughness small 1.2 microns rms, and strongly dependent upon freezing rate well layer thickness.