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Graphite tiles from both the ALT-II and inner-bumper limiters were removed from TEXTOR and subjected to materials analysis. Results indicate low metallic impurity concentration on the surfaces of both types of tiles. Increased metallic concentration coincides with regions of increased plasma flux to the surface. The ALT-II tiles exhibit a uniformly eroded surface. The inner-bumper limiter tiles show both eroded and redeposited regions, in agreement with power deposition measurements of the tiles in TEXTOR. The redeposited regions reveal enhanced erosion and recycling when exposed to controlled plasma bombardment.

Additional information

Authors: DOERNER R ET AL., University of California, Institute of Plasma and Fusion Research, Los Angeles (US);MILLS B E, Sandia National Laboratories, Livermore (US);DOYLE B L, Sandia National Laboratories, Albuquerque (US);WATKINS J G, Sandia National Laboratories, Albuquerque (US);WALSH D S, Idaho State University, Idaho Falls (US);WALLURA E ET AL., Kernforschungsanlage Jülich GmbH, Jülich (DE);MIYAHARA A, National Institute for Fusion Science, Furocho, Chikusaku, Nagoya (JP)
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 176 & 177 (1990) pp. 954-961
Record Number: 199110630 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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