Characterization of impurities deposited on the PDX graphite rail limiter

Conference · Tue May 01 04:00:00 EDT 1984

OSTI ID:7091359

Doyle, B L; Wampler, W R; Dylla, H F; Owens, D K; Ulrickson, M L

The surface contamination of a graphite rail limiter recently removed from the PDX tokamak has been characterized using ion-beam, electron-beam and x-ray analyses. The major impurities detected were Ti and Fe, with the Ti present in the form of a carbide. The distribution of these elements indicate that the erosion and deposition processes balance at a distance one cm from the apex of this limiter (the point of contact with the plasma) for Ti and at about two cm for Fe. The importance of TiC formation on the conditioning process is discussed.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA); Princeton Univ., NJ (USA). Plasma Physics Lab.
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7091359
• Report Number(s): SAND-83-2614C; CONF-840520-2; ON: DE84011684
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
CARBIDES
CARBON
CARBON COMPOUNDS
CLOSED PLASMA DEVICES
ELEMENTAL MINERALS
ELEMENTS
GRAPHITE
IMPURITIES
IRON
LIMITERS
METALS
MINERALS
NONMETALS
PDX DEVICES
THERMONUCLEAR DEVICES
TITANIUM
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TOKAMAK DEVICES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS