Geodesic acoustic modes (GAMs) are ubiquitous oscillatory flow phenomena observed in
toroidal magnetic confinement fusion plasmas, such as tokamaks and stellarators. They are …

Dynamics of shear Alfvén waves and energetic particles are crucial to the performance of
burning fusion plasmas. This article reviews linear as well as nonlinear physics of shear …

A general theoretical framework for investigating the nonlinear dynamics of phase space
zonal structures is presented in this work. It is then, more specifically, applied to the limit …

The role of energetic particles (EPs) in fusion plasmas is unique as they could act as
mediators of cross-scale couplings. More specifically, EPs can drive instabilities on the …

Geodesic acoustic modes (GAM) are oscillating zonal structures unique to toroidal plasmas,
and have been extensively studied in the past decades due to their potential capabilities of …

Energetic particle driven geodesic acoustic modes (EGAMs) in Large Helical Device
plasmas are investigated using MEGA code. MEGA is a hybrid simulation code for energetic …

In this paper, we report on a comparison of collisionless simulations on global modes (ie low
poloidal mode number) with the gyrokinetic particle-in-cell code NEMORB against analytical …

Eigenmode analysis of geodesic acoustic modes (GAMs) driven by fast ions is performed,
based on a set of gyrokinetic equations. Resonance to the magnetic drift of the fast ions can …

Effects of system nonuniformities and kinetic dispersiveness on the spontaneous excitation
of Geodesic Acoustic Mode (GAM) by Drift Wave (DW) turbulence are investigated based on …

The nonlinear dynamics of energetic-particle (EP) driven geodesic acoustic modes (EGAM)
is investigated here. A numerical analysis with the global gyrokinetic particle-in-cell code …