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  • Central electron temperature enhancements due to sawtooth stabilization during counter electron cyclotron current drive in Tokamak Ó Configuration Variable


In the Tokamak Ó Configuration Variable (TCV), the central electron temperature obtained in discharges with counter (CNTR) electron cyclotron resonance heating (ECRH) alone. Comparison of experimental results with calculations by the transport code PRETOR [IAEA Technical Conference on Advances in Simulation and Models of Thermonuclear Plasmas, Montreal 142 (International Atomic Energy Agency, Vienna, 1992)] indicates that sawtooth stabilization is responsible for the increased confinement time and the attendant twofold enhancement of the central temperature. Sawtooth stabilization is caused in turn by the central safety factor q0 rising above 1 for CNTR-ECCD; by contrast, the simulation results show that q0<1 in the sawtooth CO-ECCD and ECRH cases.

Additional information

Authors: PIETRZYK Z A ET AL, Centre de Recherches en Physique des Plasmas, Association-EURATOM-ConfÚdÚration Suisse, Ecole Polytechnique FÚdÚral de Lausanne (CH)
Bibliographic Reference: Article: Physics of Plasmas, Vol. 7 (2000) No. 7, pp. 2909-2914
Availability: Physics of Plasmas (Journal)
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