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

The present status of zonal flow experiments is reviewed with the historical process to attain
the concept of zonal flows, which provides a new framework for understanding turbulence …

We report observations of the dynamic response of micro-fluctuations and turbulent flux to a
low-frequency heating power modulation in the Large Helical Device. The responses of heat …

Density fluctuations in I-mode discharges in ASDEX Upgrade are studied. The I-mode
specific weakly coherent mode (WCM) appears at the transition from the L to I-mode. The …

This Letter presents the discovery of macroscale electron temperature fluctuations with a
long radial correlation length comparable to the plasma minor radius in a toroidal plasma …

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 …

The three-dimensional wavenumber and frequency spectrum for the geodesic acoustic
mode (GAM) has been measured in the HuanLiuqi-2A tokamak for the first time. The …

The spectral characteristics of the geodesic acoustic mode (GAM) are investigated
systematically by applying the two-point correlation technique and bispectral analysis to …

Geodesic acoustic modes (GAM) driven by energetic particles are observed in the Large
Helical Device (LHD) by a heavy ion beam probe. The GAM localizes near the magnetic …

Global gyrokinetic particle simulation finds that the collisionless damping rate of the
geodesic acoustic mode (GAM) in tokamak is greatly enhanced by trapped electrons in the …