Abstract
Tritium distributions on the W-coated divertor tiles used
with Be wall in JET 2011-2012 ITER-like wall (JET-ILW)
campaign were measured using an imaging plate (IP)
technique. The high intensity of photo-stimulated
luminescence (PSL) from IP was observed at the regions
covered by deposited Be layers. However, the PSL
intensity was not simply proportional to the thickness of
the deposited Be layers; the shadowed region of Tile 4
showed the highest PSL intensity though the thickness of
deposited Be layer on this region was smaller than that
on Tile 0 and the apron of Tile 1 by an order of
magnitude. These observations indicated the influence of
impurities such as oxygen on tritium retention in the
deposited Be layers. The C tiles used in the 2007-2009
JET carbon wall (JET-C) campaign were also examined. The
high PSL intensity was observed for the regions covered
with deposited C layers in this case. The area of tile
surfaces covered by the deposited tritium-rich layers on
the W-coated-tiles used in the JET-ILW campaign was
significantly smaller than that on the C tiles used in
the JET-C campaign.
| Original language | English |
|---|---|
| Number of pages | 5 |
| Journal | Physica Scripta |
| Volume | 2016 |
| Issue number | T167 |
| DOIs | |
| Publication status | Published - 2016 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- beryllium
- fusion reactors
- materials
- plasma facing materials
- tritium
- tungsten
