Abstract
During the carbon wall operations of JET since 2001, an
extensive post-mortem analysis programme has been carried
out under the JET Task Force Fusion Technology and a
similar analysis programme is underway for the JET-ILW
tiles removed during the 2012 shutdown. The first
post-mortem results from the JET ITER-like wall tiles
have shown that the overall amount of deposition on the
divertor tiles and on remote divertor areas has been
reduced by more than an order of magnitude with respect
to JET-C. In addition, the obtained data indicate a
possible interaction between Be and W such as the
formation of mixed Be-W layers. This could be due to the
surface roughness of the tiles, or could be caused by
diffusion or even alloying. Ion-beam analyses and
secondary ion mass spectrometry techniques give only
elemental information, so other techniques such as x-ray
diffraction, x-ray photoelectron spectroscopy, secondary
electron microscopy/energy dispersive x-ray spectroscopy
and nuclear microprobing are required. Since the nature
of deposition and erosion has changed during the JET-ILW
operations, a change in the post-mortem analysis
programme is needed. For example, no cross-sectional
samples from the sloping parts of tiles 4 and 6 are
required. A strategy for post-mortem analyses of the
marker-coated tiles will be presented in this paper.
Original language | English |
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Article number | 014016 |
Number of pages | 5 |
Journal | Physica Scripta |
Issue number | T159 |
DOIs | |
Publication status | Published - 2014 |
MoE publication type | A1 Journal article-refereed |