Modeling disruptive instabilities and feedback control in JT-60SA high betaN scenarios

The superconducting tokamak JT-60SA is being built in Naka (Japan) and has and important supporting mission for the development of fusion energy: designed to achieve long pulses (100 s) and break-even equivalent plasmas, it will help in both the exploitation of ITER and in the definition of an optimized DEMO design. The off-axis Negative-NBI at 0.5 MeV beam energy, allows current profile tailoring for Advanced Tokamak scenarios with fully non-inductive current drive. The focus is set on high betaN scenarios, in which kink-like instabilities (e.g. one or more RWMs) are potentially unstable and possibly lead to disruptions. In the framework of a joint European-Japanese collaboration, coordinated effort on MHD stability and control modeling is ongoing for the safe realization and exploitation of high betaN plasmas. A summary of the activities carried out within EUROfusion WPSA on RWM stability (MARS-F/K) and control is given, with first application to JT-60SA of modeling tools that allow the implementation and testing of active control strategies (CarMa based dynamic simulator).