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

In this paper, recent progress on experimental analysis and theoretical models for non-local
transport (non-Fickian fluxes in real space) is reviewed. The non-locality in the heat and …

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 …

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 …

We derive the E× B shearing rate associated with vortex flow inside a macroscopic magnetic
island (MI) in axisymmetric toroidal geometry. Due to the elongation of the MI and …

Collapse of the edge flow shear as the line-averaged density approaches the Greenwald
density limit has been observed as a precursor to the enhanced edge particle flux …

We present analyses of mechanisms which convert radial inhomogeneity to broken k||-
symmetry and thus produce turbulence driven intrinsic rotation in tokamak plasmas. By …

Edge shear flow and its effect on regulating turbulent transport have long been suspected to
play an important role in plasmas operating near the Greenwald density limit n G. In this …

The influence of changing collisionality on density fluctuation characteristics is studied
during dedicated ν∗ scaling experiments, using Doppler backscattering system. First, the …

Theoretical progress in understanding E× B shear suppression of turbulence and zonal flow
relaxation in collisionless toroidal plasma is reviewed. Dependence on the magnetic field …