Material Strength Hohlraum Development

We have demonstrated Omega hohlraums that remain open past 80 ns. These hohlraums deliver a drive that is uniform over a 1 mm$^{2}$ area (1). We also demonstrated hohlraums on Janus, a 2-beam 800 J facility at LLNL, with a uniform area 500 $\mu $m in diameter. These hohlraums drive ICE configurations, in which the hohlraum radiation drive shocks up an ablator, which then unloads across a vacuum gap to quasi-isnetropically drive a metal foil. We have also devised a new technique to measure M-band radiation preheat. These hohlraums will be extended to NIF in 2008. (1) R.F. Smith, S.M. Pollaine, S.J. Moon, H.S. Park, K.T. Lorenz, P.M. Celliers, J.H. Eggert, G.W. Collins, ``High planarity x-ray drive for ultra-fast shockless-compression experiments,'' accepted Physics of Plasmas (2007)