Document Type

Article

Publication Date

3-1-1990

Journal Title

Physical Review Letters

Volume Number

64

Issue Number

11

First Page

1258

Last Page

1261

DOI

10.1103/PhysRevLett.64.1258

Version

Publisher PDF: the final published version of the article, with professional formatting and typesetting

Disciplines

Physics

Abstract

Fast-wave and slow-wave current drive near the mean gyrofrequency were compared in the Irvine Torus. The slow-wave current drive density limit observation was extended by an order of magnitude in wave frequency compared to previous tokamak results. At low densities, the fast-wave antenna was observed to launch slow waves which drove currents that suffered from the current drive density limit identical to waves launched from the slow-wave antenna. At higher densities, current was driven by the fast-wave antenna while none was driven by the slow-wave antenna.

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