Time-resolved impurity fluxes in the TEXTOR plasma edge

Journal Article · Wed May 01 04:00:00 EDT 1985 · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.573103· OSTI ID:5466937

Zuhr, R A; Wampler, W R

The internal configuration of the TEXTOR tokamak at Kernforschungsanlage (KFA) Juelich, Federal Republic of Germany, has been modified recently to include antennas for Ion Cyclotron Resonance Heating (ICRH) of the plasma. Passive deposition probe measurements of edge impurity fluxes were made for typical Ohmic discharges with this new liner configuration. The time-resolved behavior of impurities in the edge was determined as a function of radius and limiter position using rotating probe techniques. The dominant metallic impurities were found to be iron and the other components of stainless steel. Average deposited iron fluxes circulating along the field lines were found to be approx.10/sup 15//cm/sup 2/ s at 5 cm behind the limiter radius. Radial profiles of the principal metallic impurities demonstrate a characteristic decrease with increasing radius outside the limiters and show an e-folding length of approx.1.9 cm. The limiting effects of the rf antenna are also evident in the radial profiles. Present results are compared with previous measurements of edge fluxes made prior to the modifications to the plasma-side liner of TEXTOR.

• Research Organization: Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5466937
• Journal Information: J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 3:3; ISSN JVTAD
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102 -- Fusion Energy-- Plasma Research-- Diagnostics
700104* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Experimental-- (-1987)
700205 -- Fusion Power Plant Technology-- Fuel
Heating
& Injection Systems
ALLOYS
CHROMIUM ALLOYS
CLOSED PLASMA DEVICES
CORROSION RESISTANT ALLOYS
ELEMENTS
HEATING
HIGH-FREQUENCY HEATING
ICR HEATING
IMPURITIES
IRON
IRON ALLOYS
IRON BASE ALLOYS
METALS
PLASMA DIAGNOSTICS
PLASMA HEATING
PROBES
STAINLESS STEELS
STEELS
TEXTOR TOKAMAK
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSITION ELEMENTS