Modelling of Electron Cyclotron Resonance Heating and Current Drive in the T-15-MD Tokamak with GENRAY and CQL3D Codes

Full text: The T-15-MD tokamak is planned as a normal magnetic-coil tokamak with a flexible ITERlike configuration of the poloidal magnetic field. The main goal of the tokamak T-15-MD is the achievement of long pulse, noninductive current drive regimes for a high-aspect-ratio divertor plasma configurations. The simulations of the ECRH and ECCD in T-15-MD tokamak are carried out with the ray-tracing code GENRAY and the kinetic Fokker–Planck code CQL3D for two formerly predicted regimes of tokamak operation, namely hybrid scenario with 12 MW auxiliary heating and 2 MA total plasma current, including inductive (Ohmic) current, and the steady-state scenario with 18 MW auxiliary heating and 1 MA fully noninductive current. The results for 2D distribution of the ECRH power density and ECCD efficiency in the tokamak poloidal cross-section on the flat-top stage of discharge are presented for various injections angles and EC wave modes. It is shown that for the ECCD in the hybrid scenario the injection of the X2-wave from the LFS is more effective than injection of the X1-wave from the HFS. (author)