High-β θ e (a ratio of the electron thermal pressure to the poloidal magnetic pressure) steady-
state long-pulse plasmas with steep central electron temperature gradient are achieved in …

A tokamak, a torus-shaped nuclear fusion device, needs an electric current in the plasma to
produce magnetic field in the poloidal direction for confining fusion plasmas. Plasma current …

Trace impurity transport is studied with the flux-driven gyrokinetic GYSELA code
(Grandgirard et al 2016 Comput. Phys. Commun. 207 35). A reduced and linearized multi …

An analysis of instability dynamics in a stochastic magnetic field is presented for the
tractable case of the resistive interchange. Externally prescribed static magnetic …

Global gyrokinetic simulations with self-consistent coupling of neoclassical and turbulent
dynamics show that turbulence can significantly affect plasma self-driven mean current …

We report the results of a gyrokinetic simulation study elucidating the characteristics of the
current driven by electron temperature gradient (ETG) turbulence in toroidal geometry. We …

Radial fluxes of parallel momentum due to $ E\times B $ and magnetic drifts are shown to be
correlated in tokamak plasmas. This correlation comes from the onset of poloidal convective …

Magnetic island perturbations may cause a reduction in plasma self-driven current that is
needed for tokamak operation. A novel effect on tokamak self-driven current revealed by …

Mechanisms through which plasma microturbulence can drive a mean electron plasma
current are derived. The efficiency through which these turbulent contributions can drive …

The Ohm's law is modified when turbulent processes are accounted for. Besides an hyper-
resistivity, already well known, pinch terms appear in the electron momentum flux. Moreover …