Sawtooth Control With ECCD On Tore Supra

Journal Article · Fri Sep 28 04:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2800518· OSTI ID:21035893

Lennholm, M; Eriksson, L -G; Turco, F; Bouquey, F; Darbos, C; Dumont, R J; Ekedahl, A; Giruzzi, G; Lambert, R; Magne, R; Rimini, F; Traisnel, E; Segui, J L ^[1]

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1. Association Euratom-CEA, DSM/DRFC, CEA/Cadarache, 13108 St. Paul-lez-Durance (France)

Sawtooth control is a potentially important method for avoiding MHD instabilities triggered by sawtooth crashes, such as neoclassical tearing modes in a reactor-size tokamak. The aim of the present study is to investigate the effect of localised current drive on Sawtooth activity. In recent experiments in the Tore Supra tokamak, Electron Cyclotron Current Drive has been observed to strongly affect the Sawtooth period, even at modest ECCD power levels. For instance, with 8 MW of ICRH long, fast ion stabilised, sawteeth were shortened from 0.6 s to 0.3 s by application of 0.6 MW of co-ECCD. In these experiments it is estimated that only 2-3% of the total current was driven by ECCD, but this was sufficient to significantly affect the sawtooth period provided the driven current was localized accurately with respect to the q = 1 surface.

• OSTI ID: 21035893
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 933; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CONTROL
ECR CURRENT DRIVE
ELECTRIC CURRENTS
ICR HEATING
IONS
MAGNETOHYDRODYNAMICS
NEOCLASSICAL TRANSPORT THEORY
PLASMA
RF SYSTEMS
SAWTOOTH OSCILLATIONS
TEARING INSTABILITY
TORE SUPRA TOKAMAK