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

This paper presents an overview of results from L–H transition experiments that were
performed at ASDEX Upgrade (AUG) with the aim of identifying the underlying mechanisms …

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 …

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 …

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 …

High spatial resolution Doppler backscattering measurements in JET have enabled new
insights into the development of the edge E r. We observe fine-scale spatial structures in the …

Results from recent experiment and numerical simulation point towards a picture of the LH
transition in which edge shear flows interacting with edge turbulence create the conditions …

The hysteresis relation between turbulence and temperature modulation during the heat
pulse propagation into a magnetic island is studied for the first time in toroidal plasmas …

The spatio-temporal interplay between turbulence, mean and zonal flows has been
investigated at the L–H and H–L transitions in the edge region of the ASDEX Upgrade …