Material transport from marker tiles in the JET divertor

Le résumé fourni par la source

For each of the three JET ILW campaigns a few special marker tiles were placed in the divertor. Amongst the W-coated CFC tiles are tiles coated with a ∼3 µm layer of Mo with a ∼4 µm topcoat of W and tiles with just a ∼4 µm layer of Mo to measure erosion and re-deposition. During ILW1 just one Mo marker tile was included in the inner divertor band of Tiles 3. After ILW1 the Mo marker was removed for analysis and inter alia two W-coated Tiles 4 to check for re-deposited Mo. About 7% of the Mo removed from the Tile 3 Mo marker was found on band 4 tiles. A fresh Mo marker Tile 3 was inserted in for ILW2+3 plus a Mo marker Tile 4 for ILW2 (after which it was removed for analysis). Tile 4 removed after ILW3 was measured for Mo re-deposition. The Mo deposition pattern on Tile 4 with a regular W topcoat was quite different to that after ILW1, with much more Mo located towards the corner of the divertor.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.