Be capsule implosions driven by dynamic hohlraum x-rays

Be is a promising ablator material for ICF capsule implosions. Ignition-size 2-mm-diameter capsules filled with 20 atm D$_{2}$ + 0.085 atm Ar absorbing up to 80 kJ were driven with a dynamic hohlraum (peak Tr $>$ 200 eV). The capsule wall was $\sim $20 microns CH overcoated with 33-55 microns Be. The thin-wall capsules produced implosion cores with T$_{e} \quad \sim $ 1 keV, $\rho \quad \sim $ 1 g cm$^{-3}$, convergence $\sim $ 7.5, neutron yield up to 3 x10$^{11}$, and pole/equator symmetry ratio of $\sim $ 1. The thickest wall capsules implode into multiple hot spots. These first-ever indirect drive Be implosions provide a foundation for examining issues such as the fill tube effects, sensitivity to columnar growth in sputtered Be fabrication, and of Cu dopant effects.