A multi-material NLTE code for HEDP simulations

Abstract

Summary form only given. We introduce Spooky, a fast multi-material non-LTE solver developed for large scale three-dimensional HEDP simulations. This highly optimized DCA code is sufficiently streamlined to run in parallel with the resistive Eulerian MHD code Gorgon1 in order to predict the thermodynamic and radiative properties of synthetic plasmas and generate filtered synthetic diagnostics outputs. An offline version of the model, including plasma motion Doppler, Stark, self absorption and lifetime broadening makes use of an original data structure to provide a more detailed post-processing treatment of spectral features. Results from simulations of shock interaction experiments2 performed with the MAGPIE generator are used to benchmark the code and non-LTE plasma effects are discussed. The capabilities of the model are illustrated with inline simulations of cylindrical wire array Z-pinch experiments carried out on the Z facility at Sandia National Laboratories and SPHINX facility at CEA. The high level of spectral details provided by the offline version of the code allows us to study the time-dependant evolution of spectral line broadening and the effect of plasma motion on the apparent ion temperature for the entire simulation volume.