Conservative global gyrokinetic toroidal full- 5D Vlasov simulation

Idomura, Yasuhiro   ; Tokuda, Shinji; Aiba, Nobuyuki; Urano, Hajime

A new global gyrokinetic toroidal full- five dimensional Vlasov simulation GT5D is developed based on the gyrokinetic theory and the linear Fokker-Planck collision operator. In a normal shear tokamak, source driven ion temperature gradient turbulence simulations are performed, and turbulent transport and profile evolutions are evolved over a collision time. It is found that a significant part of the heat flux is carried by avalanches in source free regions, where stiff temperature profiles are sustained. In this region, the equilibrium radial electric field becomes significantly larger than the neoclassical level, and its shear strongly affects the directions of the avalanche propagation and the momentum flux. A non-diffusive momentum flux due to the shear is observed and non-zero (intrinsic) toroidal rotation is sustained without momentum input near the axis.