Fifteen-centimeter-diameter UHV transfer system for remote plasma-wall interaction experiments

Journal Article · Thu May 01 04:00:00 EDT 1980 · J. Vac. Sci. Technol.; (United States)

DOI:https://doi.org/10.1116/1.570546· OSTI ID:5371796

Clausing, R E; Emerson, L C; Heatherly, L; Domm, T C; Simpkins, J E; Langley, R A

A versatile UHV apparatus is described which permits large (up to 10 x 10 cm) sample arrays or entire experiments to be inserted from air into an operating tokamak. This can be accomplished without perturbing the tokamak vacuum. Samples or experiments may be exposed in the tokamak for studies of plasma-wall interactions and removed at any time without requiring tokamak shutdown. Samples or experiments may be accurately positioned in the region between the vacuum wall and the plasma limiter remotely. The apparatus provides up to 20 electrical connections for thermocouples, heaters, and signal leads. It also provides linear and rotary mechanical motion for operating experiments sychronized to tokamak discharges. Experiments or samples may be prepared off site and loaded into the transfer system under vacuum. A surface analysis station integral with the transfer system permits individual sample preparation, characterization, and analysis before and after plasma exposures.

• Research Organization: Metals and Ceramics Division Oak Ridge National Laboratory Oak Ridge, Tennessee 37830
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5371796
• Journal Information: J. Vac. Sci. Technol.; (United States), Journal Name: J. Vac. Sci. Technol.; (United States) Vol. 17:3; ISSN JVSTA
• Country of Publication: United States
• Language: English

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