Hohlraum Radiation Drive Measurements on the Omega Laser

Time-resolved drive measurements with thin-walled hohlraum targets on Omega [J. M. Soures et al., Phys. Plasmas 3, 2108 (1996)] are presented and compared with two-dimensional hydrodynamical simulations. For the first time, radiation fluxes are measured through the laser entrance hole instead of through a diagnostic side hole. We find improved agreement between time dependent experiments and simulations using this new technique. In addition, the drive history obtained in this manner correlates well with the drive onto the capsule at target center.