Sheared Rotation Effects on Kinetic Stability in Enhanced Confinement Tokamak Plasmas, and Nonlinear Dynamics of Fluctuations and Flows in Axisymmetric Plasmas

Abstract

25, 1167 (1985)], with reversed magnetic shear regions in the plasma interior. The high-n toroidal drift modes destabilized by the combined eects of ion temperature gradients and trapped particles in toroidal geometry can be strongly aected by radially-sheared toroidal and poloidal plasma rotation. In previous work with the FULL linear microinstability code, a simplied rotation model including only toroidal rotation was employed, and results were obtained. Here, a more complete rotation model, that includes contributions from toroidal and poloidal rotation and the ion pressure gradient to the total radial electric eld, is used for a proper self-consistent treatment of this key problem. Relevant advanced operating mode cases for TFTR are presented. In addition, the complementary problem of the dynamics of uctuation-driven E B ow i s investigated by a n i n tegrated program of gyrokinetic simulation in annulus 1 geometry and gyrouid simulation in ux tube geometry. 52.35Qz, 52.65Tt, 52.55FaTypeset using REVT E X 2