Simulation of turbulence and transport for Tokamak plasmas in general geometry

Summary form only given. Direct numerical simulation of microturbulence and the induced anomalous transport in Tokamak plasmas had long been thwarted by the difficulty with large time step due to fast electron parallel motion, and by the difficulty to accurately account for the effects of magnetic perturbations, both arising from the large ion/electron mass ratio. Recently an electromagnetic kinetic electron particle simulation model that uses a generalized split-weight scheme has been developed in three dimensional geometry using the field-line-following coordinates. The model includes electron-ion collisional effects and has been linearly benchmarked with continuum codes. The model is most suitable for studying the Ion-Temperature-Gradient-Driven drift-wave instabilities and turbulent transport, but can also be employed to study the nonlinear behavior of tearing modes. General magnetic field configuration in the form of Miller equilibrium has been implemented. Effects of plasma elongation, triangularity and flux surface shift on turbulence and transport level will be reported.