On L to H-mode transitions of tokamak and entropy reduction

In an ideal case it is assumed that the models for tokamak and stellarator plasma behaviour lead to the theory of invariant manifolds by Rastovic ( Chaos , SOlitons & Fractals , 2007 ) . But , in present state of knowledge , more realistic concept for describing L to H transitions and edge localized modes ( ELMs ) are reduction of entropy and appropriate methods .