Electron cyclotron resonance heating on TEXTOR

TitleElectron cyclotron resonance heating on TEXTOR
Publication TypeJournal Article
Year of Publication2005
AuthorsE. Westerhof, I.A Hoekzema, G.MD Hogeweij, R.JE Jaspers, F.C Schüller, C.J Barth, H. Bindslev, W.A Bongers, A.JH Donne, P. Dumortier, A.F van der Grift, D. Kalupin, H.R Koslowski, A. Kramer-Flecken, O.G Kruijt, N.JL Cardozo, H.J van der Meiden, A. Merkulov, A. Messiaen, J.W Oosterbeek, P.R Prins, J. Scholten, V.S. Udintsev, B. Unterberg, M. Vervier, G. van Wassenhove
JournalFusion Science and Technology
Volume47
Number2
Pagination108-118
Date PublishedFeb
Type of ArticleArticle
ISBN Number1536-1055
Accession NumberISI:000226876100007
Keywordscollective Thomson scattering, CONFINEMENT, CURRENT DRIVE, electron cyclotron current drive, electron cyclotron resonance heating, EMISSION, FUSION PLASMAS, IMPROVED MODE, SHEAR, THERMAL TRANSPORT, TOKAMAK PLASMAS, TRANSPORT BARRIERS
Abstract

TEXTOR is equipped with two gyrotrons at 110 and 140 GHz, respectively. Both share a single power supply and a confocal quasi-optical transmission line. They cannot be operated simultaneously. The 110-GHz gyrotron with limited power and pulse length (300 kW; 200 ms) has been used in a first series of experiments on electron cyclotron resonance heating (ECRH) and electron cyclotron current drive (ECCD) and for collective Thomson scattering (CTS) diagnostics of energetic ions. In the future the 110-GHz gyrotron will be operated exclusively for CTS diagnostics, while for ECRH and ECCD, the newly installed 140-GHz, high-power (800-kW), long-pulse (>3-s) gyrotron is now available. The highlights of first ECRH experiments with the 110-GHz gyrotron are reported. These include observations of internal transport barriers with ECRH on various target plasmas: in the current plateau phase of both ohmic and radiation improved mode (RI-mode) discharges. In addition, sawtooth control by localized ECRH is demonstrated. First results on CTS include the observation of the slowing down of energetic ions and of the redistribution of energetic ions in sawtooth crashes.

URL<Go to ISI>://000226876100007
Division

Fusion Physics

Department

Tokamak physics

PID

713f9114ab1bea17e0370bc0df9293c5

Alternate TitleFusion Sci. Technol.

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