Recent Advances in Sawtooth Control
نویسندگان
چکیده
Important advances have been made recently in the invention and application of experimental methods to control the sawtooth instability in tokamak plasmas. The primary means of control involves the application of either ion cyclotron resonance heating, or electron cyclotron heating, with resonance very close to the q = 1 radius in the plasma core. Reported here are experiments which have successfully applied these methods in order to either shorten or lengthen the sawteeth deliberately, in a variety of plasma conditions, in three tokamaks: JET, TCV and TORE-SUPRA. It is shown that despite the sensitivity of the sawtooth period to the resonance position, sawteeth can be controlled using either real-time control of the electron cyclotron ∗[email protected] †See the Appendix of F. Romanelli et al., Fusion Energy Conference 2008 (Proc. 22nd Int. FEC Geneva, 2008) IAEA, (2008)
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1 École Polytechnique Fédérale de Lausanne (EPFL), Centre de Recherches en Physique des Plasmas, Association EURATOM-Confédération Suisse, 1015 Lausanne, Switzerland 2UKAEA/Euratom Fusion Association, Culham Science Centre, Abingdon, UK 3Association Euratom-VR, KTH, SE-100 44 Stockholm, Sweden 4EFDA-JET CSU, Culham Science Centre, Abingdon, OX14 3DB, UK ∗ See the Appendix of F. Romanelli et al....
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