Institute of Plasma Physics;
Hefei Institutes of Physical Science;
Chinese Academy of Sciences;
Hefei 230031;
China;
University of Science and Technology of China;
Hefei 230026;
China;
Department of Engineering Physics;
Tsinghua University;
Beijing 100084;
China;
disruption mitigation; massive gas injection(MGI); Experimental Advanced Superconducting Tokamak(EAST);