Investigation of ECCD on the first and second harmonics ECR

Electron cyclotron current drive (ECCD) on the 1st and 2nd harmonics of the electron cyclotron resonance (ECR) is considered. Mainly the T-10 experimental results are described and comparison with the experimental data from various devices is performed. Features of ECCD are studied by comparison of Fokker-Planck (FP) calculations with measurements of X-ray spectra in discharges with ECCD. It is shown that ECCD efficiency is in a good agreement with FP calculations. Database obtained on various devices allows to assume that in ITER the ECCD efficiency can be achieved as high as eta CD =0.3*10 20 A/Wm 2 .