Indirectly Driven, High Convergence Inertial Confinement Fusion Implosions

A series of high convergence, indirectly driven implosions has been done with the Nova Laser Fusion facility. These implosions were well characterized by a variety of measurements; computer models are in good agreement. The imploded fuel areal density was measured using a technique based on secondary neutron spectroscopy. At capsule convergences of 24:1, comparable to what is required for the hot spot of ignition scale capsules, these capsules achieved fuel densities of 19 g/${\mathrm{cm}}^{3}$. Independent measurements of density, burn duration, and ion temperature gave $n\ensuremath{\tau}\ensuremath{\theta}=1.7\ifmmode\pm\else\textpm\fi{}0.9\ifmmode\times\else\texttimes\fi{}{10}^{14}\mathrm{keV} \frac{\mathrm{s}}{{\mathrm{cm}}^{3}}$.