Spectral Modeling of Opacity-on-NIF experiments

The Opacity-on-NIF project has the goal of verifying the higher-than-expected iron opacity measurements done on the Z-machine. We describe our procedure for post-processing xRage radiation-hydrodynamics simulation results to create synthetic spectra for comparison to data collected by the spectrometer. These simulations are post-processed with the backlighter shining through the sample (or the hohlraum without a sample) to create synthetic spectra that include contributions from the sample and CH tamper, the tamper by itself, and the background that includes sample self-emission. We show select synthetic spectra for several different electron temperatures and electron densities for iron, compare them to the equivalent data and comment on the quality of the comparison.