Expediting Higher Fidelity Plasma State Reconstructions for the DIII-D National Fusion Facility Using Leadership Class Computing Resources

The OMFIT CAKE workflow for plasma state reconstruction has been automated on the DIII-D National Fusion Facility to run on a combination of computational resources at DIII-D and the National Energy Research Computing (NERSC) Center, utilizing the emerging DOE Integrated Research Infrastructure (IRI). The reconstruction of the plasma state is vital for understanding what occurred in the DIII-D machine during the pulse. This understanding allows informed decisions to be made on how to change the configuration for the next pulse. The initial reconstruction workflow was performed on DIII-D resources for a benchmark case in 62 minutes. The wall-clock time for the benchmark case was reduced to 11 minutes by running on the Perlmutter system at NERSC, which opens the possibility to influence decisions between DIII-D pulses during an experiment. The reconstruction results can be used as inputs for other modeling analyses; the determination of the classification of the microturbulence modes is given as an example model analysis.