Investigation of MHD activity caused by Shattered Pellet Injection via JOREK 3D non-linear MHD simulations

摘要

Introduction Shattered Pellet Injection (SPI) is the baseline concept for ITER disruption mitigation. The ITER system aims on injecting about 10~(25) atoms on a millisecond timescale. Comparing with the established Massive Gas Injection (MGI) technique, SPI is shown to exhibit better penetration, faster assimilation and more efficient mixing [1]. It is desirable for us to acquire a better understanding about the MHD activities stimulated by the injection, as they are important both to the triggering of thermal quench (TQ) and the particle mixing afterward. This will be the focus of the study presented here on simulations of deuterium SPI into a JET plasma.