Sawtooth Control With ECCD On Tore Supra
- 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, Vol. 933, Issue 1; Conference: 17. topical conference on radio frequency power in plasmas, Clearwater, FL (United States), 7-9 May 2007; Other Information: DOI: 10.1063/1.2800518; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
MHD limits in non-inductive tokamak plasmas: simulations and comparison to experiments on Tore Supra
Demonstration of sawtooth period control with EC waves in KSTAR plasma