Long-term fuel retention in JET ITER-like wall

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

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    Abstract

    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
    Volume2016
    Issue numberT167
    DOIs
    Publication statusPublished - 25 Jan 2016
    MoE publication typeA1 Journal article-refereed

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    Keywords

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

    Cite this

    Heinola, K., Widdowson, A., Likonen, J., Alves, E., Baron-Wiechec, A., Barradas, N., Brezinsek, S., Catarino, N., Coad, P., Koivuranta, S., Krat, S., Matthews, G. F., Mayer, M., Petersson, P., & Contributors, J. (2016). Long-term fuel retention in JET ITER-like wall. Physica Scripta, 2016(T167), [014075]. https://doi.org/10.1088/0031-8949/T167/1/014075