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Fuel Retention in the Gas Box Divertor of JET

M. Rubel et al.

Fusion Science and Technology / Volume 48 / Number 1 / July/August 2005 / Pages 569-572

Technical Paper / Tritium Science and Technology - Materials Interaction and Permeation /

Components of the JET Mk-II Gas Box divertor have been analysed ex-situ after 18 months of operation with that divertor structure. The aim was to give an account on the distribution of the retained fuel along the poloidal cross-section of the divertor and, in particular, in the septum. Inside the gas box thick hydrogenated deposits were formed only on surfaces located in the near-plasma region from the inner divertor side whereas very little deposition was detected deep inside the gas box, i.e. on the support and divider plates.

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