Destabilization of fast-ion-induced long sawteeth by localized current drive in the JET tokamak
In a tokamak fusion reactor the energetic alpha particles will transiently stabilize the magnetohydrodynamic activity causing sawtooth oscillations. The crash events terminating long sawtooth free periods can provide seed islands for neoclassical tearing modes. To shorten the sawtooth periods localized current drive near the q = 1 surface is a possibility. This Letter provides the first experimental evidence for the effectiveness of this method in the different physics regime associated with fast-ion-induced long sawteeth on the JET tokamak.
Bibliographic Reference: An article published in: Physical Review Letters, Volume 92, Number 23, Week ending 11 June 2004
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Record Number: 200417587 / Last updated on: 2004-06-28
Original language: en
Available languages: en