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Numerical simulations of current driven in tokamaks by fast waves (FWCD) have been performed in the ion cyclotron and lower frequency ranges by the 3-D code ICTOR. The effects of trapped particles were taken into account in the calculation of the FWCD efficiency and the bootstrap current generation. Typically, at a central electron temperature of 10 keV, the global FWCD efficiency is found to be 0.1 x 1.0 E20 A/W.m2 in JET. Non-inductive current density profiles are studied. Broad FWCD current profiles are obtained for flat reactor temperature and density profiles with bootstrap current concentrated at the plasma edge. The possibility of a steady-state reactor on FW with a large fraction of bootstrap current is discussed. It appears to be impractical to rely on such an external CD scheme for a reactor as long as the efficiency is less than 2 x 1.0 E20 A/W.m2.

Additional information

Authors: DMITRIEVA M V, JET Joint Undertaking, Abingdon, Oxon. (GB);ERIKSSON L-G, JET Joint Undertaking, Abingdon, Oxon. (GB);GAMBIER D J, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-R(92)9 EN (1992) 36 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
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