Abstract

The wave-induced current by electron cyclotron resonance heating (ECRH) is investigated in an axisymmetric toroidal plasma. The plasma is assumed to be so weakly relativistic that the only relativistic correction to the resonance condition is considered. The effect of trapped electrons are also calculated to the order of \(\sqrt{\varepsilon}\), where e is the inverse aspect ratio. The trapped electrons and the relativistic resonance condition are shown to have important effect on the efficiency of current drive by ECRH.

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