ITER Predictions Using the GYRO Verified and Experimentally Validated TGLF Transport Model

The trapped gyro-Landau fluid (TGLF) transport model computes the quasi-linear particle and energy driftwave fluxes in tokamaks with shaped geometry, finite aspect ratio, and collisions. The TGLF particle and energy fluxes have been successfully verified against a large database of collisionless nonlinear gyrokinetic simulations using the GYRO code. Using a new collision model in TGLF, we find remarkable agreement between the TGLF quasi-linear fluxes and 64 new GYRO nonlinear simulations with electron-ion collisions. In validating TGLF against DIII-D and JET H-mode and hybrid discharges we find the predicted temperature profiles are in excellent agreement with the measured ion and electron temperature profiles. ITER projections using TGLF show that the fusion gains are somewhat more pessimistic than the previous GLF23 results primarily due to finite aspect ratio effects included only in TGLF. The ITER results are sensitive to the improvements in the TGLF collision model while the results for DIII-D and JET hybrids are not. A new steady-state transport code TGYRO can evolve temperature and density profiles to match power and particle sources using local flux tube nonlinear GYRO simulations or a model like TGLF. TGYRO thus provides a critical verification of the TGLF predictions for ITER using GYRO.