Complex Behavior of Internal Collapse Due to Self-Generated Radial Electric Field

The density gradient effect is taken into account in the gyro-kinetic nonlinear simulation of the kinetic n = I internal kink mode to clarify the nonlinear behavior of the internal collapse. Even when the density gradient is not so large enough to change the process of the full reconnection, the later process is changed considerably due to the self-generated radial electric field. The nonlinear growth of the 0/0 mode after the internal collapse violates the symmetrical flow of the parallel current, restricting the secondary reconnection.