Understanding and controlling the interaction between alpha particles and modes in the Alfvén frequency range is a crucial issue for ITER operation, as these modes can be driven unstable up to amplitudes at which they could cause radial transport of the as themselves. Experimental verifications of the theoretical calculations on the instability threshold of Alfvén Eigenmodes (AEs) driven by MeV-energy ions are therefore needed. In this paper we analyse the dependence of the damping rate and stability threshold of Toroidal Alfvén Eigenmodes (TAEs) on the ion B-drift direction. In addition, the AE decay time at the switch-off of the Ion Cyclotron Resonance Frequency (ICRF) heating power is measured in order to provide for a quantitative comparison with non-linear modelling of the AE interaction with fast ions.