TRANSPORT DYNAMICS OF COLLAPSE IN A GIANT ELM

Dynamics of collapse in a giant ELM (Edge Localized Mode) is presented . A model of transport bifurcation between the H-mode and the magnetic braiding mode (M-mode) is applied to the simulational study of edge p lasma dynamics. The bifurcation contains the hysteresis characteristic s. The pressure profile development, the propagation of the bifurcatio n (transition) fronts and the resultant bursting fluxes are obtained. The appearance of a pivot point in the pressure profile, an avalanche followed to the transition front propagation, and the structure of the burst are shown.