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

Recent experimental and simulation work has substantially advanced the understanding of
L-mode plasma edge turbulence and plasma flows and their mutual interaction across the L …

Direct evidence of zonal flow (ZF) predator-prey oscillations and the synergistic roles of ZF-
and equilibrium E× B flow shear in triggering the low-to high-confinement (L-to H-mode) …

A complex interaction between turbulence driven E× B zonal flow oscillations, ie, geodesic
acoustic modes (GAMs), the turbulence, and mean equilibrium flows is observed during the …

A fast edge turbulence suppression event has been simulated in the electrostatic version of
the gyrokinetic particle-in-cell code XGC1 in a realistic diverted tokamak edge geometry …

A quasiperiodic Er oscillation at a frequency of< 4 kHz, much lower than the geodesic-
acoustic-mode frequency, with a modulation in edge turbulence preceding and following the …

Transport barrier formation and its relation to sheared flows in fluids and plasmas are of
fundamental interest in various natural and laboratory observations and of critical …

Comprehensive 2D turbulence and eddy flow velocity measurements on DIII-D demonstrate
a rapidly increasing turbulence-driven shear flow that develops∼ 100 μ s prior to the low …

The formation of the equilibrium radial electric field (Er) has been studied experimentally at
ASDEX Upgrade (AUG) in L-modes of “favorable”(ion∇ B-drift toward primary X-point) and …

This paper describes the first observations in the National Spherical Torus Experiment
(NSTX)[SM Kaye et al, Phys. Plasmas 8, 1977 (2001)] of “quiet periods” in the edge …