Abstract
ITER current drive and heating system has to provide various functions, such as initial plasma formation, current ramp-up assist, heating to ignition, current drive, current profile control, and burn control. The system is composed of radio-frequency waves with several frequencies and neutral beams with high energy to cover those multi-functions. The first option is based on a neutral beam (75MW, 1.3MeV), lower hybrid waves (50MW, 5GHz) and electron cyclotron waves (20MW, 120GHz). Another candidate uses ion cyclotron waves (130MW, 15-80MHz) instead of the neutral beam. The conceptual designs for those four systems are described here.
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