Internal transport barriers in tokamak plasmas are explored in order to improve confinement
and stability beyond the reference scenario, used for the ITER extrapolation, and to achieve …

The excitation of collective instabilities by super-thermal particles in hot plasmas and the
related transport processes attract increasing interest due to their fundamental challenges …

A new gyrokinetic toroidal particle code has been developed to study the ion temperature
gradient (ITG) driven turbulence in reactor relevant tokamak parameters. We use a new …

This paper presents the results of three-dimensional fluid global simulations of electrostatic
ion turbulence in tokamaks with reversed magnetic shear. It is found that a transport barrier …

It is shown from a symmetry in the gyrokinetic equation that for up–down symmetric tokamak
equilibria and for u ϕ⪢ ρ υ thi∕ r (where u ϕ is the toroidal velocity, υ thi is the thermal ion …

Global gyrokinetic simulations of turbulence include physical effects that are not retained in
local flux-tube simulations. Nevertheless, in the limit of sufficiently small ρ*(gyroradius …

The theory, development, and validation of reduced quasilinear models of gyrokinetic
turbulent transport in the closed flux surface core of tokamaks is reviewed. In combination …

Results of stability analysis are presented for two types of plasma with good confinement:
internal transport barriers (ITBs) on Tore Supra and the radiative improved (RI) mode on …

This overview summarizes the latest developments in plasma turbulence simulations and
their impact on transport modelling. The traditional approach, based on the mixing length …

Electromagnetic microinstabilities in tokamak plasmas are studied by means of a linear
global eigenvalue numerical code. Ion dynamics is described by the gyrokinetic equation, so …