Impurity transport in the scrape-off layer of a tokamak

Journal Article · Sat Oct 01 04:00:00 EDT 1988 · Sov. J. Plasma Phys. (Engl. Transl.); (United States)

OSTI ID:6439713

Nedospasov, A V; Fidel'man, G N

The problem of the distibution in the ''shadow'' of a poloidal limiter of a tokamak of the impurity which arrives from the central plasma column is analyzed by the hydrodynamic approach. The length scale of the decrease in the impurity density is found as a function of the plasma parameters, the impurity species, and the charge state of the impurity for the turbulent and convective mechanisms for plasma transport. The radial impurity distribution is found to be substantially flatter than might be expected on the basis of classical ideas. The reason is that effective mechanisms such as turbulent transport and plasma convection operate to remove impurities toward the chamber wall.

• Research Organization: Institute of High Temperatures, Academy of Sciences of the USSR
• OSTI ID: 6439713
• Journal Information: Sov. J. Plasma Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Plasma Phys. (Engl. Transl.); (United States) Vol. 14:10; ISSN SJPPD
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
ANNULAR SPACE
BOUNDARY LAYERS
CHARGED PARTICLES
CLOSED CONFIGURATIONS
CLOSED PLASMA DEVICES
CONFIGURATION
IMPURITIES
INSTABILITY
IONIZATION
IONS
LAYERS
LIMITERS
MAGNETIC FIELD CONFIGURATIONS
MULTICHARGED IONS
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA SCRAPE-OFF LAYER
SPACE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TOROIDAL CONFIGURATION
TURBULENCE