Plasma Heating in the Ion Cyclotron Range of Frequencies in DIII-D

Abstract

Experiments on plasma heating with waves in the ion cyclotron range of frequencies that have been performed on the DIII-D tokamak are reviewed. High-power experiments (P_rf ≿ 1 MW) have been performed using the ion Bernstein wave (IBW) (1988–1990), 32-MHz fast waves (FWs) (1990–1991), 60-MHz FWs (1991–1999), and higher-frequency FWs up to 120 MHz (1994–present). Efficient electron heating of the core plasma has been obtained in all of these regimes, with the exception of the IBW experiments.