Tritium distributions on W-coated divertor tiles used in the third JET ITER-like wall campaign

Tritium (T) distributions on tungsten (W)-coated plasma-facing tiles used in the third ITER-like wall campaign (2015-2016) of the Joint European Torus (JET) were examined by means of an imaging plate technique and beta-ray induced x-ray spectrometry, and they were compared with the distributions after the second (2013-2014) campaign. Strong enrichment of T in beryllium (Be) deposition layers was observed after the second campaign. In contrast, T distributions after the third campaign was more uniform though Be deposition layers were visually recognized. The one of the possible explanations is enhanced desorption of T from Be deposition layers due to higher tile temperatures caused by higher energy input in the third campaign.

Y. Hatano, S.E. Lee, J. Likonen, S. Koivuranta, M. Hara, et al.. Tritium distributions on W-coated divertor tiles used in the third JET ITER-like wall campaign. Nuclear Materials and Energy, Elsevier, 2019, 18, pp.258-261. ⟨10.1016/j.nme.2019.01.001⟩. ⟨hal-02177095⟩

Journal: Nuclear Materials and Energy

Date de publication: 01-01-2019

Auteurs:
  • Y. Hatano
  • S.E. Lee
  • J. Likonen
  • S. Koivuranta
  • M. Hara
  • S. Masuzaki
  • N. Asakura
  • K. Isobe
  • T. Hayashi
  • J. Ikonen
  • A. Widdowson
  • Davide Galassi

Digital object identifier (doi): http://dx.doi.org/10.1016/j.nme.2019.01.001

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