nfluence of Radial Electric Fields on Plasma Confinement

Radical electric fields may play an important role in L-Htransition. The influence of sheared flows induced by radical electric fields on the confinement of plasma inTokamak is discussed in this paper. A neoclassical ion heat transport coefficient model is adopted, in which the effect of sheared poloidal rotation is taken into account, and the heat flux function has multiple values with the same plasma density and temperature. This model is applied to MHD equations, with the numerical result showingthatthere is a sharp temperature gradient at the plasma edge in the situation ofHmode.