Scrape-off layer flows in the Tore Supra tokamak

Journal Article · Sun Jan 15 04:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2168794· OSTI ID:20797917

Gunn, J P; Loarer, T; Saint-Laurent, F; Bucalossi, J; Devynck, P; Hertout, P; Moreau, P; Nanobashvili, I; Rimini, F ^[1]; Boucher, C; Dionne, M ^[2]; Duran, I; Fuchs, V; Panek, R; Stoeckel, J; Adamek, J; Dejarnac, R; Hron, M ^[3]; Sarkissian, A ^[4]

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1. Association EURATOM-CEA/DSM/DRFC, Centre de Cadarache, 13108 Saint Paul Lez Durance (France)
2. INRS-EMT, 1650 Lionel-Boulet, J3X 1S2 Varennes (Canada)
3. Association EURATOM/IPP.CR, 18200 Praha 8 (Czech Republic)
4. Plasmionique, 1650 Lionel-Boulet, J3X 1S2 Varennes (Canada)

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 variation 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 nonuniform core-to-SOL outflux concentrated near the outboard midplane. Strong variations of the SOL width up to a factor of 10 suggest that this localized outflux is due to enhanced radial transport. The plasma that gets ejected into the SOL can expand radially to the wall if magnetic field lines have long connection lengths and pass unobstructed across the outboard midplane.

• OSTI ID: 20797917
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 812; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIVERTORS
LIMITERS
MACH NUMBER
MAGNETIC FIELDS
PLASMA
PLASMA SCRAPE-OFF LAYER
RADIATION TRANSPORT
TORE SUPRA TOKAMAK
VARIATIONS