Community Research and Development Information Service - CORDIS

FP7

Modelling SOL flow pattern spreading in the edge plasma

Funded under: FP7-EURATOM

Abstract

The transition region between closed and open magnetic flux surfaces plays a crucial role for tokamak performances. Appropriate understanding of the edge region remains a major challenge owing to several open issues as momentum transport, turbulence overshoot or neutral penetration. We consider here a transport model system to investigate the propagation of parallel momentum from the SOL into the core plasma and vice-versa. The numerical results show that for small values of the radial diffusion coefficient, the density profile decays exponentially from the core to the SOL as predicted by 1D analytical solution. A spreading of the parallel momentum from the SOL to the core is observed, with the presence of non-zero velocities also in the regions far from the SOL. The effect of an imposed rotation of the core plasma is investigated as well as the dynamics of an overdensity imposed in the core plasma.

Additional information

Authors: ISOARDI L, M2P2 CNRS/Aix-Marseille Université, Marseille (FR);CIRAOLO G, M2P2 CNRS/Aix-Marseille Université, Marseille (FR);CHIAVASSA G, M2P2 CNRS/Aix-Marseille Université, Marseille (FR);HALDENWANG P, M2P2 CNRS/Aix-Marseille Université, Marseille (FR);SERRE E, M2P2 CNRS/Aix-Marseille Université, Marseille (FR);GHENDRIH PH, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);SARAZIN Y, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);SCHWANDER F, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);GARBET X, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);TAMAIN P, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB)
Bibliographic Reference: An oral paper given at: 18th International Conference on Plasma-Surface Interactions in Controlled Fusion Device Organised by: Laboratorio Nacional de Fusión Held in: Toledo (ES)
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/doi:10.1016/j.jnucmat.2009.01.088
Record Number: 200910355 / Last updated on: 2009-09-22
Category: PUBLICATION
Original language: en
Available languages: en