Real-time plasma event monitoring on TCV

A tokamak reactor plasma control system (PCS) supervisor must take decisions about discharge segment scheduling, exception handling (e.g. emergency shutdown), and prioritized control tasks [D. Humphreys et al, 2015 Physics of Plasmas 22 021806], based on chains of plasma events, such as stability limit violations, deviations from targets and expected/predicted behavior, and actuator failure [P.C. de Vries et al, 2011 Nuclear Fusion 51 053018]. We present first results of a real-time plasma event monitor for NTMs and locked modes on the TCV tokamak. The event monitor contains finite-state automata, with events based on user-defined thresholds on MHD amplitude signals [C. Galperti et al, 2017 IEEE Transactions on Nuclear Science 64]. This work supports the integration of high-level plasma supervision, control and actuator management for disruption avoidance experiments.