FLOW PROFILE MEASUREMENT WITH A ROTATING MACH PROBE IN THE SCRAPE-OFFLAYER OF THE JFT-2M TOKAMAK

Authors
OHDACHI S SHOJI T NAGASHIMA K TAMAI H TOYAMA H
Citation
S. Ohdachi et al., FLOW PROFILE MEASUREMENT WITH A ROTATING MACH PROBE IN THE SCRAPE-OFFLAYER OF THE JFT-2M TOKAMAK, Fusion engineering and design, 34-5, 1997, pp. 725-728
Citations number
8
Categorie Soggetti
Nuclear Sciences & Tecnology
Journal title
Fusion engineering and design → ACNP
ISSN journal
09203796
Volume
34-5
Year of publication
1997
Pages
725 - 728
Database
ISI
SICI code
0920-3796(1997)34-5:<725:FPMWAR>2.0.ZU;2-E
Abstract
The ion flow velocity profile of the JFT-2M scrape-off layer (SOL) pla sma has been measured with a rotating Mach probe. It is found that the parallel flow (about 20 km s(-1) in the same direction as the plasma current) is dominant at the outer mid-plane of the SOL. Although the p arallel-perpendicular flows are affected by the radial electric field made by divertor biasing, the SOL plasma tends to rotate always toroid ally with very small shear. (C) 1997 Elsevier Science S.A.