The effect of plasma shaping on the damping of radially extended Alfvén eigenmodes(AEs) is investigated experimentally during the limiter phase of JET plasma discharges. The AE damping rate is observed to increase with increasing elongation, triangularity and edge magnetic shear. These parameters could therefore be used to control the AE stability in real time.
Identifying Alfvén eigenmodes in the early phase of advanced tokamak plasmas