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

The area of energetic particle (EP) physics in fusion research has been actively and
extensively researched in recent decades. The progress achieved in advancing and …

The excitation of collective instabilities by super-thermal particles in hot plasmas and the
related transport processes attract increasing interest due to their fundamental challenges …

The impact on turbulent transport of geodesic acoustic modes excited by energetic particles
is evidenced for the first time in flux-driven 5D gyrokinetic simulations using the Gysela code …

We show in this paper that geodesic acoustic modes (GAMs) can be efficiently excited by a
population of fast ions even when Landau damping on thermal ions is accounted for. We …

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 particles produced by neutral beams are observed to excite energetic-particle-
driven geodesic acoustic modes in tokamaks. We study the effects of anisotropy of …

Nonlinear frequency chirping of the energetic-particle-driven geodesic acoustic mode
(EGAM) is investigated using a hybrid simulation code for energetic particles interacting with …

Abstract n= 0 modes with frequency chirping have been observed by a heavy ion beam
probe and Mirnov coils in the large helical device plasmas, where n is the toroidal mode …

A novel mechanism for energy transfer from energetic particles to bulk ions via geodesic
acoustic modes (GAMs) is presented. The mechanism involves the excitation of GAMs by …