학술논문
Identification of BeO and BeOxDy in melted zones of the JET Be limiter tiles: Raman study using comparison with laboratory samples
Document Type
Author
Kumar, M.; Andersson Sundén, Erik; Binda, Federico, 1987; Cecconello, Marco; Conroy, Sean; Dzysiuk, Nataliia; Ericsson, Göran; Eriksson, Jacob, Dr, 1985; Hellesen, Carl, 1980; Hjalmarsson, Anders; Possnert, Göran, 1951; Sjöstrand, Henrik, 1978; Skiba, Mateusz, 1985; Weiszflog, Matthias; Zychor, I.
Source
Nuclear Materials and Energy. 17:295-301
Subject
Language
English
ISSN
2352-1791
Abstract
Beryllium oxide (BeO) and deuteroxide (BeOxDy) have been found on the melted zone of a beryllium tile extracted from the upper dump plate of JET-ILW (2011-2012 campaign). Results have been obtained using Raman microscopy, which is sensitive to both the chemical bond and crystal structure, with a micrometric lateral resolution. BeO is found with a wurtzite crystal structure. BeOxDy is found as three different types which are not the beta-phase but behaves as molecular species like Be(OD)(2), O(Be-D)(2) and DBeOD. The presence of a small amount of trapped D2O is also suspected. Our results therefore strongly suggest that D trapping occurs after melting through the formation of deuteroxides. The temperature increase favors the formation of crystal BeO which favors deuterium trapping through OD bonding.