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Current profile tailoring by Electron Cyclotron Heating (ECH) and Current Drive (ECCD) is used to improve core electron energy confinement in TCV. Counter-ECCD on-axis alone achieves this goal in a transient manner only. A stable scenario is obtained by a two-step sequence of off-axis ECH, which stabilizes MHD modes, and on-axis counter-ECCD, which generates a flat or inverted current profile. This high-confinement regime, with central temperatures up to 9 keV, has been sustained for the entire duration of the heating pulse, or over 200 energy confinement times.

Additional information

Authors: PIETRZYK Z ET AL, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Federale de Lausanne (CH), Association EURATOM
Bibliographic Reference: Article: Physical Review Letters, (2000) LPR 667/00, 11pp.
Availability: Available from European Commission, DG XII Communication Unit rue de la Loi/Wetstraat 200, B-1049 Bruxelles (BE) Tel: +32-2-2950001 Fax:+32-2-2958220 email:
ISBN: ISSN: 0458-5895
Record Number: 200012916 / Last updated on: 2000-12-18
Original language: en
Available languages: en