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Dynamics of tearing modes during strong electron cyclotron heating on the FTU tokamak
E Lazzaro1, A Airoldi, A Bruschi
1I.F.P.CNR, Assoc. EURATOM-ENEA-CNR, Via Cozzi 53, 20125 Milan, Italy.
Physical Review Letters
|September 16, 2000
Abstract:
The localized electron cyclotron resonance heating power that can suppress sawteeth reconnection often drives m = 2 tearing modes in a tokamak operating at constant current. The dynamics of mode onset and coupled mode evolution is described in detail and compared with a nonlinear theoretical model that identifies the effects of mode coupling, finite inertia of the rotating islands, and wall braking.