Dynamic evolution of resistive kink mode with electron diamagnetic drift in tokamaks

The dynamic evolution of the m/n = 1/1 resistive kink mode with electron diamagnetic drift is investigated by employing a three-dimensional toroidal Hall-MHD code CLT. It is found that the dependence of the linear growth rate of the resistive kink mode on the electron diamagnetic drift velocity is associated with thermal conductivity. For a large thermal conductivity, the linear growth rate of the resistive kink mode monotonically decreases with increasing electron diamagnetic drift velocity. But, for a small thermal conductivity, the linear growth rate increases first and then decreases with increasing electron diamagnetic drift velocity, which is different from previous studies. The saturation level of the resistive kink mode decreases with increasing electron diamagnetic drift velocity. Published under license by AIP Publishing.