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Proceedings Paper

Testing of plasma facing materials for divertors in the JET neutral-beam test bed
Author(s): Hans Dieter Falter; Dragoslav Ciric; P. Massmann; Antonio Cardella; Masato Akiba
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Paper Abstract

Flat Beryllium tiles brazed to actively cooled CuCrZr withstand power densities up to 17 MW/m2. Tiles with 2 mm thickness have been cycled for 1000 pulses at power densities between 12 and 14 MW/m2. Flat CFC tiles brazed to OFHC copper failed at power densities of 13 MW/m2 with long (10 s) pulses. The fault developed from an area which showed signs of overheating from the start of the test and led to a complete detachment of one tile. For shorter pulse duration (2.5 s) higher power densities (17 MW/m2) could be applied. CFC cubes brazed around a central cooling pipe (monoblocks) have been tested to 15 MW/m2. The power density was limited by the peak surface temperature of the tiles, which exceeded 1500 - 2000 degree(s)C. None of the tiles failed during the test, but there were considerable temperature variations from tile to tile.

Paper Details

Date Published: 12 November 1993
PDF: 12 pages
Proc. SPIE 1997, High Heat Flux Engineering II, (12 November 1993); doi: 10.1117/12.163798
Show Author Affiliations
Hans Dieter Falter, JET Joint Undertaking (United Kingdom)
Dragoslav Ciric, JET Joint Undertaking (United Kingdom)
P. Massmann, JET Joint Undertaking (United Kingdom)
Antonio Cardella, Max-Planck-Institut fuer Plasma Physik (Germany)
Masato Akiba, Japan Atomic Energy Research Institute (Japan)

Published in SPIE Proceedings Vol. 1997:
High Heat Flux Engineering II
Ali M. Khounsary, Editor(s)

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