Interference of robust tori on the resonance overlap

Abstract

We study a dynamical system which describes the overlap of resonances in a global integrable context and we present a new topological scenario for the reconnection of three resonance island chains in the presence of two robust tori. These tori induce this new scenario and they play the role of transport barriers which are relevant for plasma confinement in Tokamaks.

The non-twist standard map with robust tori

“…We propose in this work that the radial transport inside the tokamak plasma can be blocked by creating other barriers, called robust tori (RT) [16][17][18], which remain intact under the action of any generic perturbation. In fact, from the theoretical point of view, these new barriers constitute insurmountable barriers.…”