Testing of plasma facing materials for divertors in the JET neutral-beam test bed

Hans Dieter Falter; Dragoslav Ciric; P. Massmann; Antonio Cardella; Masato Akiba

doi:10.1117/12.163798

12 November 1993 Testing of plasma facing materials for divertors in the JET neutral-beam test bed

Hans Dieter Falter, Dragoslav Ciric, P. Massmann, Antonio Cardella, Masato Akiba

Proceedings Volume 1997, High Heat Flux Engineering II; (1993) https://doi.org/10.1117/12.163798
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

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.

Citation Download Citation

Hans Dieter Falter, Dragoslav Ciric, P. Massmann, Antonio Cardella, and Masato Akiba "Testing of plasma facing materials for divertors in the JET neutral-beam test bed", Proc. SPIE 1997, High Heat Flux Engineering II, (12 November 1993); https://doi.org/10.1117/12.163798

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