EFFECTS INDUCED BY ICRF WAVES ON VARIOUS CONFINEMENT SCHEMES IN TORE-SUPRA

The 1993-94 experimental campaign has seen a significant increase of t he application of waves in the ion cyclotron range of frequency on Tor e Supra. Ion cyclotron resonant heating has been applied to plasmas wi th strongly radiating layers, pellet-enhanced performance and lower hy brid enhanced performance. Initial experiments on direct coupling of t he fast magnetosonic wave to the electrons have demonstrated coupling up to 5 MW to the plasma and have demonstrated an efficient electron h eating in these discharges. A significant bootstrap current fraction i s observed. This heating scheme leads to a stationary improvement in e nergy confinement, with implications for the Rebut-Lallia-Watkins loca l transport model. Finally, preliminary experiments on antenna phasing have shown clear evidence of fast wave current drive.