Self-consistent gyrokinetic modeling of turbulent and neoclassical tungsten transport in toroidally rotating plasmas - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue Physics of Plasmas Année : 2023

Self-consistent gyrokinetic modeling of turbulent and neoclassical tungsten transport in toroidally rotating plasmas

K. Lim
Connectez-vous pour contacter l'auteur
E. Gravier
Maxime Lesur
Guillaume Lo-Cascio
T. Rouyer

Résumé

The effect of toroidal rotation on both turbulent and neoclassical transport of tungsten (W) in tokamaks is investigated using the flux-driven, global, nonlinear 5D gyrokinetic code GYSELA. Nonlinear simulations are carried out with different levels of momentum injection that drive W into the supersonic regime, while the toroidal velocity of the main ions remains in the subsonic regime. The numerical simulations demonstrate that toroidal rotation induces centrifugal forces that cause W to accumulate in the outboard region, generating an in–out poloidal asymmetry. This asymmetry enhances neoclassical inward convection, which can lead to central accumulation of W in cases of strong plasma rotation. The core accumulation of W is mainly driven by inward neoclassical convection. However, as momentum injection continues, roto-diffusion, proportional to the radial gradient of the toroidal velocity, becomes significant and generates outward turbulent flux in the case of ion temperature gradient turbulence. Overall, the numerical results from nonlinear GYSELA simulations are in qualitative agreement with the theoretical predictions for impurity transport.
Fichier principal
Vignette du fichier
POP23-AR-00658.pdf (2.96 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Licence : CC BY - Paternité

Dates et versions

hal-04180521 , version 1 (12-08-2023)

Licence

Paternité

Identifiants

Citer

K. Lim, X. Garbet, Y. Sarazin, E. Gravier, Maxime Lesur, et al.. Self-consistent gyrokinetic modeling of turbulent and neoclassical tungsten transport in toroidally rotating plasmas. Physics of Plasmas, 2023, 30 (8), ⟨10.1063/5.0157428⟩. ⟨hal-04180521⟩
92 Consultations
14 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More