ALFVEN-WAVE DRIVING FORCES AND PLASMA-FLOW IN TOKAMAK PLASMAS

The resonant and non-resonant current drive and plasma how produced by the Alfven and fast waves are discussed for both collisional and coll isionless magnetized plasmas. The magneto-hydrodynamics approach is us ed to study collisional plasma regimes, and the kinetic model is consi dered for the weakly collisional plasmas. Time-averaged poloidal and t oroidal ponderomotive forces driven by the Alfven waves are estimated analytically and calculated numerically. The effect of plasma flow on the driving forces is found. Balancing the ponderomotive force with th e ion viscosity, strong sheared toroidal and poloidal plasma rotations are found for wave dissipated power about 400 kW in small tokamaks. I n this case hollow current profiles (inverted magnetic shear) can also be achieved. This configuration can help create internal transport ba rriers.