T. Watari


Plasma Heating and Current Drive

Date of publication:

Oct. 1997

Key words:

Plasma Heating, ECH, ICH, ICRF, LHH, IBWH, NBI, ECCD, fast wave current drive, LHCD, NBCD, current drive efficiency, wave dispersion relation, wave absorption


Plasma heating is one of the very important aspects of nuclear fusion research, by which plasma is heated up to a few 10's of keV to obtain large enough fusion reaction rate to sustain chain reaction. Among the heating methods examined in the past in the experiments Electron Cyclotron Heating. Ion Cyclotron Heating, Lower Hybrid Heating, and Neutral Beam Heating were proven their usefulness. They have their own unique features and. therefore, survived their competition in tokamak experiments. This lecture intend to give the audience some essence of the physics related to Plasma Heating to help understand intriguing evolution of this field in the past and new applications. The lecture will also refer to the fact that the same heating methods can be used in driving current in plasmas. Current drive is important idea to facilitate steady state tokamak reactor. This lecture also gives a handy account of the mechanism of current drive, requirement of the current drive efficiency, and an assessment of achievable maximum current drive efficiencies in the future.

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