Electron cyclotron resonance heating on TEXTOR
- Westerhof, E.
- Hoekzema, J. A.
- Hogeweij, G. M. D.
- Jaspers, R. J. E.
- Schüller, F. C.
- Barth, C. J.
- Bongers, W. A.
- Donne, A. J. H.
- Dumortier, P.
- van der Grift, A. F.
- van Gorkom, J. C.
- Kalupin, D.
- Koslowski, H. R.
- Kramer-Flecken, A.
- Kruijt, O. G.
- Cardozo, N. J. L.
- Mantica, P.
- van der Meiden, H. J.
- Merkulov, A.
- Messiaen, A.
- Oosterbeek, J. W.
- Oyevaar, T.
- Poelman, A. J.
- Polman, R. W.
- Prins, P. R.
- Scholten, J.
- Sterk, A. B.
- Tito, C. J.
- Udintsev, V.S.
- Unterberg, B.
- Vervier, M.
- van Wassenhove, G.
Publication date
January 2003
DOI ISSN
0029-5515 Citation count (estimate)
17Abstract
The 110 GHz and the new 140 GHz gyrotron systems for electron cyclotron resonance heating (ECRH) and ECCD on TEXTOR are described and results of ECRH experiments with the 110 GHz system are reported. Central ECRH on Ohmic plasmas shows the presence of an internal electron transport barrier near q = 1. This is confirmed by modulated ECRH experiments. A central barrier is also indicated by ECRH in radiatively improved (RI) mode discharges and up to two barriers are seen with ECRH during the current ramp phase. ECRH control of sawteeth is reported for both Ohmic and RI mode target plasmas
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