Long-term fuel retention in JET ITER-like wall

K. Heinola (Corresponding Author), A. Widdowson, Jari Likonen, E. Alves, A. Baron-Wiechec, N. Barradas, S. Brezinsek, N. Catarino, P. Coad, Seppo Koivuranta, S. Krat, G. F. Matthews, M. Mayer, P. Petersson, JET Contributors

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    57 Citations (Scopus)


    Post-mortem studies with ion beam analysis, thermal desorption, and secondary ion mass spectrometry have been applied for investigating the long-term fuel retention in the JET ITERlike wall components. The retention takes place via implantation and co-deposition, and the highest retention values were found to correlate with the thickness of the deposited impurity layers. From the total amount of retained D fuel over half was detected in the divertor region. The majority of the retained D is on the top surface of the inner divertor, whereas the least retention was measured in the main chamber on the mid-plane of the inner wall limiter. The recessed areas of the inner wall showed significant contribution to the main chamber total retention. Thermal desorption spectroscopy analysis revealed the energetic T from DD reactions being implanted in the divertor. The total T inventory was assessed to be >0.3 mg.

    Original languageEnglish
    Article number014075
    Number of pages7
    JournalPhysica Scripta
    Issue numberT167
    Publication statusPublished - 25 Jan 2016
    MoE publication typeA1 Journal article-refereed


    • deposition
    • fuel retention
    • fusion energy
    • ion beam analysis
    • TDS


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