Abstract
The stability features of discrete Alfvén eigenmodes (αTAEs) trapped by α-induced potential wells are explored in the China Fusion Engineering Test Reactor (CFETR) advanced steady-state operation environment, where α denotes a measure of the pressure gradient. For the reversed magnetic shear (RS) H-mode scenario with an enhanced internal transport barrier (ITB), the αTAEs are trapped in the electron cyclotron (EC) power deposition region and the effects of different pedestals on αTAEs are analyzed. For the negative off-axis magnetic shear scenario, the αTAEs are discussed, and the effect of different magnetic shears on the αTAEs is presented. Finally, the effects of beam energies and pitch-angle distributions on αTAE stability are also presented.
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