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 …

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 …

We investigate the dynamics of the low (L)→ high (H) transition using a time-dependent, one
dimensional (in radius) model which self-consistently describes the time evolution of zonal …

The efficient operation of a tokamak is limited by several constraints, such as the transition to
high confinement or the density limits occurring in both confinement regimes. These …

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 relation between the macroscopic input power required at ASDEX Upgrade to access
the H-mode Pthr and the microscopic E× B shear has been investigated via fast charge …

Abstract Experiments on HL-2A, DIII-D and EAST show that turbulence just inside the last
closed flux surface acts to reinforce existing sheared E× B flows in this region. This flow drive …

Velocity fields and density fluctuations of edge turbulence are studied in I-mode [F. Ryter et
al., Plasma Phys. Controlled Fusion 40, 725 (1998)] plasmas of the Alcator C-Mod [IH …