Resonant and Ponderomotive Pumping of Zonal Flows by Turbulence, Alfv\'en Eigenmodes, and Radiofrequency Waves
Analytical studies of zonal-flow (ZF) excitation by fluctuating fields, such as drift-wave turbulence and Alfv\'en eigenmodes (AEs) driven by energetic particles (EPs) in tokamaks, are usually carried out via intricate gyrokinetic calculations and simulations whose results are notoriously difficult to interpret. Here,...