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Abstract

Near-sonic parallel flows are systematically observed in the scrape-off layer (SOL) of the limiter tokamak Tore Supra, as in many X-point divertor tokamaks. The poloidal varaiation of the Mach number of the parallel flow has been measured by moving the contact point of a small circular plasma onto limiters at different poloidal angles. The resulting variations of flow are consistent with the existence of a poloidally nonuniforum core-to-SOL outflux concentrated near the outboard midplane. Strong variations of the SOL width up to a factor of 10 suggest that this localised outflux is due to enhanced radial transport. The plasma that gets ejected into the SOL can expand radically to the wall if magnetic field lines have long connection lengths and pass unobstructed across the outboard midplane.

Additional information

Authors: GUNN J, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);LOARER T, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);SAINT-LAURENT F, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);BUCALOSSI J, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);DEVYNCK P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);HERTOUT P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);MOREAU D, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);NANOBASHVILI S, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);RIMINI F, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);BOUCHER C, INRS-EMT, Varennes (CA);DIONNE M, INRS-EMT, Varennes (CA);DURAN I, Association ERATOM/IPP, Praha (CZ);FUCHS V, Association ERATOM/IPP, Praha (CZ);PANEK R, Association ERATOM/IPP, Praha (CZ);STÖCKEL J, Association ERATOM/IPP, Praha (CZ);ADAMEK J, Association ERATOM/IPP, Praha (CZ);DEJARNAC R, Association ERATOM/IPP, Praha (CZ);HRON M, Association ERATOM/IPP, Praha (CZ);SARKISSIAN A, Plasmionique, Varennes (CA)
Bibliographic Reference: An oral paper given at: 7th International Conference PLASMA-2005 - 2005 on Research and Applications of Plasmas Organised by: Institute of Physics, Opole University, Opole (PL) Held at: Opole (PL)
Availability: Available from Association EURATOM-CEA, Département de Recherches sur la Fusion Contrôlée, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: dirdrfc@drfc.cad.cea.fr
Record Number: 200518331 / Last updated on: 2005-09-26
Category: PUBLICATION
Original language: en
Available languages: en