Surrogate Model for M3D-C1 Linear Resistive-MHD Stability

Development toward a surrogate model for M3D-C1, an extended-MHD code primarily used to model the large-scale stability of magnetically confined fusion plasmas, is presented. Initial progress has centered on training a surrogate model on a large database of M3D-C1 calculations performed with a linear resistive model over a range of equilibria and physical parameters. The surrogate model is intended to enable the calculation of linear resistive-MHD eigenfunctions and growth rates in a small fraction of the time required for a typical linear M3D-C1 calculation. This surrogate could be a useful tool for itegrated modeling, pulse design, between-shot analysis, and, potentially, real-time control. It will also serve as a proof-of-concept for future work on more compute-intensive nonlinear models.