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Abstract:
Electron Cyclotron Heating (ECH) discharges of the tokamak ASDEX Upgrade, exhibiting T-e profile resilience, are used to test the Weiland model in the case of dominant electron heating. Electron heat transport is investigated also transiently, with heat pulse propagation induced by ECH power modulation. The Weiland model, dominated by the Trapped Electron Mode physics in this parameter range, predicts the experimental T-e well, both the time averaged profile as well as the amplitude and phase of the T-e perturbation. Interestingly, in the confinement region the experimental delT(e)/T-e is up to three times larger than the critical threshold predicted by the model.
