Self-pumping impurity control by in-situ metal deposition

Technical Report · Sun May 01 00:00:00 EDT 1983

DOI:https://doi.org/10.2172/6078289· OSTI ID:6078289

Brooks, J N; Mattas, R F

A system for in-situ removal of helium by trapping in freshly deposited metal surface layers of a limiter or divertor has been studied. The system would trap helium on a limiter front surface, or a divertor plate, at low plasma edge temperatures, or in a limiter slot region, at high edge temperatures. Fresh material, introduced to the plasma and/or scrape-off zone, would be added at a rate of about five times the alpha production rate. The material would be reprocessed periodically, e.g., once year. Possible materials are nickel, vanadium, niobium, and tantalum. Advantages of a self-pumping system are the absence of vacuum ducts and pumps, and the minimization of tritium processing and inventory.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 6078289
• Report Number(s): ANL/FPP/TM-174; ON: DE83014265
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIVERTORS
SURFACE COATING
HELIUM
TRAPPING
LIMITERS
IMPURITIES
NICKEL
NIOBIUM
REMOVAL
SURFACES
TANTALUM
VACUUM SYSTEMS
VANADIUM
DEPOSITION
ELEMENTS
FLUIDS
GASES
METALS
NONMETALS
RARE GASES
TRANSITION ELEMENTS
700209* - Fusion Power Plant Technology- Component Development & Materials Testing