Multimode simulations of indirectly-driven high-convergence plastic capsules on Omega

An extensive Omega database of indirect-drive implosions with Ge-doped CH ablators and deuterium (DD) fuel has been developed over the past several years. Previously, nominally smooth capsules with fuel pressures from 5 to 50 atm were successfully analyzed [1] using the weakly nonlinear Haan saturation model. More recently, high-convergence (10 atm DD) targets were fielded with intentionally roughened ablators to test our modeling tools in a more nonlinear regime. Improved hohlraum modeling to accommodate the measured ($\approx$ 2x) enhancement (relative to nominal XSN opacity modeling) in gold M-band (2-5 keV) preheat and the use of thin walls ($\approx$ 2 micron) for non-perturbative diagnosis of core symmetry is implemented. A frequency-dependent source is then extracted to drive separate capsule-only simulations with HYDRA [2] in 2-D. Results of multimode simulations spanning RMS capsule roughness from 10-350 nm are presented and compared with data. \newline [1] P. Amendt, R.E. Turner, and O.L. Landen, PRL 89, 165001 (2002). \newline [2] M. Marinak \textit{et al}., PoP 8, 2275 (2001).