Impurity transport in tokamak plasmas, theory, modelling and comparison with experiments
C Angioni - Plasma Physics and Controlled Fusion, 2021 - iopscience.iop.org
In this paper, the theory of collisional and turbulent transport of impurities in tokamak
plasmas is reviewed. The results are presented with the aim of providing at the same time a …
plasmas is reviewed. The results are presented with the aim of providing at the same time a …
Observation of a reduced-turbulence regime with boron powder injection in a stellarator
F Nespoli, S Masuzaki, K Tanaka, N Ashikawa… - Nature Physics, 2022 - nature.com
In state-of-the-art stellarators, turbulence is a major cause of the degradation of plasma
confinement. To maximize confinement, which eventually determines the amount of nuclear …
confinement. To maximize confinement, which eventually determines the amount of nuclear …
Analytical model for the combined effects of rotation and collisionality on neoclassical impurity transport
The influence of rotation, collisionality and trapped particle fraction on the magnitude and
direction of neoclassical impurity transport in tokamaks is analyzed using an extensive …
direction of neoclassical impurity transport in tokamaks is analyzed using an extensive …
Turbulent impurity transport simulations in Wendelstein 7-X plasmas
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 …
simulations is presented for Wendelstein 7-X (W7-X). The calculations have been carried out …
[HTML][HTML] Charge-state independent anomalous transport for a wide range of different impurity species observed at Wendelstein 7-X
In this paper, the plasma volume averaged impurity confinement of selected charge states
and impurity species has been characterized for the Stellarator Wendelstein 7-X (W7-X) …
and impurity species has been characterized for the Stellarator Wendelstein 7-X (W7-X) …
Global gyrokinetic simulations of electrostatic microturbulent transport in LHD stellarator with boron impurity
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 …
166256 of the Large Helical Device stellarator in the presence of boron impurity show the co …
KNOSOS: a fast orbit-averaging neoclassical code for stellarator geometry
Abstract KNOSOS (KiNetic Orbit-averaging SOlver for Stellarators) is a freely available, open-
source code (https://github. com/joseluisvelasco/KNOSOS) that calculates neoclassical …
source code (https://github. com/joseluisvelasco/KNOSOS) that calculates neoclassical …
Turbulent transport of impurities in 3D devices
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 …
Wendelstein 7-X (W7-X) plasmas has been experimentally inferred during the first …
Bolometer tomography on Wendelstein 7-X for study of radiation asymmetry
D Zhang, R Burhenn, CD Beidler, Y Feng… - Nuclear …, 2021 - iopscience.iop.org
The algorithm for bolometer tomography at Wendelstein 7-X (W7-X) has been recently
improved using a novel regularization functional, based on relative gradient smoothing of …
improved using a novel regularization functional, based on relative gradient smoothing of …
Self-consistent, global, neoclassical radial-electric-field calculations of electron-ion-root transitions in the W7-X stellarator
MD Kuczyński, R Kleiber, HM Smith, CD Beidler… - Nuclear …, 2024 - iopscience.iop.org
The radial electric field in the Wendelstein 7-X stellarator is computed by means of self-
consistent, global, neoclassical simulations using the gyrokinetic particle-in-cell code …
consistent, global, neoclassical simulations using the gyrokinetic particle-in-cell code …