TRANSPORT MODELING INCLUDING RADIAL ELECTRIC-FIELD AND PLASMA ROTATION

In order to study the role of the radial electric field in the tokamak transport, a one-dimensional transport code which describes the toroi dal and poloidal plasma rotation as well as the radial electric field has been developed. The neoclassical transport, turbulent transport an d ion orbit loss are included. Using a simple turbulent transport mode l with a constant diffusion coefficient and a fixed temperature profil e, the density profile in a steady state and the transient behavior du ring the co and counter neutral beam injection are studied. More consi stent analysis has been initiated with a turbulent transport model bas ed on the current diffusive high-n ballooning mode. The enhancement of the radial electric field due to ion orbit losses and the reduction o f the transport due to the poloidal rotation shear are demonstrated. T he preliminary calculation indicates a sensitive temperature dependenc e of the density profile.