A new quasi-isodynamic (QI) stellarator configuration optimized for the confinement of
energetic ions at low plasma β is obtained. The numerical optimization is carried out using …

Collisionless physics primarily determines the transport of fusion-born alpha particles in 3D
equilibria. Several transport mechanisms have been implicated in stellarator configurations …

In the present Letter, first-of-its-kind computer simulations predicting plasma profiles for
modern optimized stellarators—while self-consistently retaining neoclassical transport …

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 …

In this article, we provide various analytical and numerical methods for calculating the
average drift of magnetically trapped particles across field lines in complex geometries, and …

A study of turbulent impurity transport by means of quasilinear and nonlinear gyrokinetic
simulations is presented for Wendelstein 7-X (W7-X). The calculations have been carried out …

A good understanding of the confinement of energetic ions in non-axisymmetric magnetic
fields is key for the design of reactors based on the stellarator concept. In this work, we …

TJ-II stellarator results on modelling and validation of plasma flow asymmetries due to on-
surface potential variations, plasma fuelling physics, Alfvén eigenmodes (AEs) control and …

In this work, a new version of KNOSOS is presented. KNOSOS is a low-collisionality radially-
local, bounce-averaged neoclassical code that is extremely fast, and at the same time …

The evidence of a large diffusive turbulent contribution to the radial impurity transport in
Wendelstein 7-X (W7-X) plasmas has been experimentally inferred during the first …