Community Research and Development Information Service - CORDIS

Abstract

This paper summarizes recent experimental characterization of radio frequency (RF)-induced scrape-off layer (SOL) modifications in ASDEX-Upgrade (AUG), JET and Tore Supra (TS). Geometrical aspects are emphasized: complex SOL patterns are observed by several indicators visualized in one or two dimensions transverse to the magnetic field lines. Results are ascribed to inhomogeneous RF-induced SOL biasing around powered ion cyclotron range of frequencies antennas and associated E x B(0) density convection (D'Ippolito et al 1993 Phys. Fluids B 5 3603). Within a simple RF sheath model (Perkins 1989 Nucl. Fusion 29 583), the shape of convective cells on TS can be interpreted in terms of RF-sheath generation by parallel RF currents. Some lessons are drawn for future machines.

Additional information

Authors: COLAS L, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);EKEDAHL A, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);GONICHE M, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);GUNN J P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);NOLD B, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);CORRE Y, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);BOBKOV V, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);DUX R, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);BRAUN F, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);NOTERDAEME J-M, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);MAYORAL M-L, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);KIROV K, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);MAILLOUX J, EURATOM-UKAEA Fusion Association, Culham Science Centre, Abingdon (GB);HEURAUX S, LPMIA, UMR 7040 CNRS, Vandoeuvre (FR);FAUDOT E, LPMIA, UMR 7040 CNRS, Vandoeuvre (FR);ONGENA J, ERM-KMS, Association EURATOM-Belgian State, Brussels (BE)
Bibliographic Reference: An article published in: Plasma Physics and Controlled Fusion 49 B35-B45 (2007)
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/10.1088/0741-3335/49/12B/S02
Record Number: 200819689 / Last updated on: 2008-02-15
Category: PUBLICATION
Original language: en
Available languages: en