HOHLRAUM SYMMETRY EXPERIMENTS WITH MULTIPLE-BEAM CONES ON THE OMEGA-LASER FACILITY

Symmetry experiments have been performed on the Omega laser facility u sing cylindrical hohlraum targets with as many as 40 beams arranged in to multiple beam cones. These experiments constitute a first step in t he development of ''beam phasing'' in which beams are arranged into mu ltiple beam cones, forming multiple rings of beam spots on the inner s urface of a cylindrical hohlraum, and demonstrate the ability to model hohlraums incorporating multiple beam cones and to tune the time-inte grated capsule flux asymmetry by adjustment of the beam painting.