Impact of safety factor and magnetic shear profiles on edge turbulence in circular limited geometry

Abstract : The impact of magnetic configuration on edge turbulence properties in circular limiter geometry is investigated using TOKAM3X, a three-dimensional (3D), first-principle, fluid code for edge plasma. The theoretical spatial tilting of magnetic shear on turbulence fluctuations is recovered. Magnetic shear is found to generate or enhance poloidal high/low field sides (HFS/LFS) and up/down asymmetries. A simulation mimicking the impact of an X-point on circular limiter geometry leads to the formation of two transport barriers that are stable in time, thus leading to the improvement of core particle confinement and to reduction of radial turbulent transport. The magnetic shear, which also strongly enhances the E x B shear, is responsible for the barrier formation.
Type de document :
Article dans une revue
Contributions to Plasma Physics, Wiley-VCH Verlag, 2018, 58 (6-8), pp.497-504
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01947228
Contributeur : M2p2 Conf <>
Soumis le : jeudi 6 décembre 2018 - 15:32:45
Dernière modification le : vendredi 7 décembre 2018 - 01:22:28

Identifiants

  • HAL Id : hal-01947228, version 1

Citation

Nicolas Nace, P. Tamain, C. Baudoin, H. Bufferand, G. Ciraolo, et al.. Impact of safety factor and magnetic shear profiles on edge turbulence in circular limited geometry. Contributions to Plasma Physics, Wiley-VCH Verlag, 2018, 58 (6-8), pp.497-504. 〈hal-01947228〉

Partager

Métriques

Consultations de la notice

13