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

An overview is given of physics differences between stellarators and tokamaks, including
magnetohydrodynamic equilibrium, stability, fast-ion physics, plasma rotation, neoclassical …

The stellarator is a type of fusion energy device that—if properly designed—could provide
clean, safe, and abundant energy to the grid. To generate this energy, a stellarator must …

The current state of the EUTERPE code is described with emphasis on the implemented
models and their numerical implementation. The code solves the multi-species …

We present a gyrokinetic theory of an E× B vortex flow in a magnetic island self-generated
from turbulence in a collisionless tokamak plasma. We have found that after fast collisionless …

We study the effect of turbulent transport in different magnetic configurations of the
Weldenstein 7-X stellarator. In particular, we performed direct numerical simulations with the …

Ion temperature gradient turbulent transport in the large helical device (LHD) is investigated
by means of gyrokinetic simulations in comparison with the experimental density fluctuation …

A three-field fluid model that allows for general three-dimensional equilibrium geometry is
developed to describe ion temperature gradient turbulent saturation processes in …

A novel reduced model for ion temperature gradient (ITG) turbulent transport in helical
plasmas is presented. The model enables one to predict nonlinear gyrokinetic simulation …

We present a gyrokinetic analysis of the vortex flow evolution in a magnetic island in
collisionless tokamak plasmas. In a short term ω¯ D t< 1, where ω¯ D is the secular …