Three-dimensional equilibrium codes are vital for stellarator design and operation, and high-
accuracy equilibria are also necessary for stability studies. This paper details comparisons …

Radial profiles of density fluctuations and the radial electric field, E r, have been measured
using Doppler reflectometry during the post-pellet enhanced confinement phase achieved …

First results from the optimized helias Wendelstein 7-X stellarator (W7-X) have shown that
core transport is no longer mostly neoclassical, as is the case in previous kinds of …

The GENE-3D code, the global stellarator version of the established GENE framework, has
been extended to an electromagnetic gyrokinetic code. This paper outlines the basic …

Global gyrokinetic simulations of electrostatic microturbulent transport for discharge#
166256 of the Large Helical Device stellarator in the presence of boron impurity show the co …

Global neoclassical simulations of a model equilibrium of the W7-X stellarator find an
ambipolar electric field with either an ion root or an electron root solution depending on the …

First experimental observations in the Wendelstein 7-X stellarator indicate that the impurity
confinement can be explained by turbulent processes. In particular, plasma discharges with …

Global gyrokinetic simulations of ion temperature gradient (ITG) and trapped electron mode
(TEM) in the LHD stellarator are carried out using the gyrokinetic toroidal code (GTC) with …

The fundamental nature of turbulent density fluctuations in standard Wendelstein 7-X (W7-X)
stellarator discharges is investigated experimentally via phase contrast imaging (PCI) in …

Global electromagnetic turbulence is simulated in stellarator geometry using the gyrokinetic
particle-in-cell code EUTERPE. The evolution of the turbulent electromagnetic field and the …