Sensitivity analysis of cross-field transport coeffcients with autoUEDGE

Using an autoUEDGE workflow, a large number of UEDGE simulations were performed to systematically examine the effects of various simulation parameters and assumptions on interpretive transport results.  Edge simulations codes such as UEDGE are regularly used to study SOL and divertor topics. However, important parameters, such as recycling and neutral density, in the tokamak edge are often not fully diagnosed, and are often assumed based on previous studies when they are not the focus of the current experiment. The automatic interpretive UEDGE workflow, autoUEDGE, has been upgraded by improving its accuracy in modeling the divertor, as well as adding cross-field drifts. This has enabled the workflow to robustly produce simulations approximating the accuracy of expert-made simulations automatically. This ability is used to perform systematic scans of past DIII-D experiments, to examine sensitivities and uncertainties. Some parameters considered includes neutral density, neutral density asymmetry, T_e,sep and T_i,sep, recycling rates, electron/ion power ratio. Neutral density and asymmetry are found to be under-constrained but important for divertor region.