Fast-wave current drive above the slow-wave density limit.
- Author(s): Sheehan, DP
- McWilliams, R
- Wolf, NS
- Edrich, D
- et al.
Published Web Locationhttps://doi.org/10.1103/physrevlett.64.1258
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. © 1990 The American Physical Society.