Numerical simulation of disruption mitigation by applying non-resonant magnetic perturbation and massive gas injection on J-TEXT

A lot of experimental and theoretical researches have been carrying out to examine the disruption mechanism and the methods to mitigate disruption, including massive gas injection (MGI) and shattered pellet injection (SPI). Based on NIMROD (non-Ideal Magnetohydrodynamics with Rotation, Open Discussion), numerical simulations of the synergistic effect between non-resonant magnetic perturbations and massive gas injection on disruption mitigation is carrying out in J-TEXT. In this paper, we investigate thermal quench, current quench time and the growth of
$\mathrm{n}=1-3$
component MHD instabilities responsed to different amplitudes of non-RMPs. The results indicates that non-RMPs can prolong thermal quench and current quench durations and create stronger perturbations during disruption, leading to a high loss of runaway electrons seeds and reducing the hazard of disruption.