Preparing for Disruptions in the SPARC Q>1 Campaign

The first SPARC campaign targets Q>1 in a DT L-mode that will experience disruptions with comparable electromagnetic (EM) loads but reduced thermal loads relative to the Q~11 scenario; here preparations for these disruptions are discussed. Radiative collapses and vertical displacement events (VDEs) during flattop or ramp-down are the most likely disruption types for this campaign. Early commissioning will provide an opportunity to test mitigation actuators and prediction algorithms. Physics-based algorithms will trigger actuators to avoid and mitigate disruptions; these algorithms, as well as machine learning-based alternatives, are under development. The toroidal and poloidal distribution of a 6-valve massive gas injection (MGI) system is finalized, informed by M3D-C1 and NIMROD simulations. Co-located bolometers are optimized using 3D tomographies of simulated data. A test stand and prototype MGI valve are designed and in procurement to validate the delivery characteristics. The runaway electron mitigation coil (REMC) is predicted to prevent relativistic electron beams that could otherwise damage tungsten PFCs and will be commissioned at low plasma current. New M3D-C1 VDE simulations are in progress to inform optimal current quench mitigation and aid the development of EM load diagnostic analysis.