Injection of nitrogen-15 tracer into ASDEX-Upgrade: New technique in material migration studies

P. Petersson, Antti Hakola, Jari Likonen, M. Mayer, J. Miettunen, R. Neu, V. Rohde, M. Rubel, ASDEX Upgrade Team

    Research output: Contribution to journalArticleScientificpeer-review

    17 Citations (Scopus)

    Abstract

    For the first time nitrogen-15 gas was used as a tracer for determining of global nitrogen retention in ASDEX-Upgrade. The injection done from the midplane gas inlet on the last day of the experimental campaign was followed by retrieval and ex situ analyses of many limiter and divertor tiles. The study was done by nuclear reaction analysis using the 15N(1H, γ4He)12C process and detecting both γ radiation and 4He. The highest and peaked concentrations of 15N, 8 × 1016 cm2, were found on limiters close to the injection point, while fairly homogeneous flat profiles were measured on most of the divertor plates. The measured concentrations are compared to an ASCOT simulation of the injection.
    Original languageEnglish
    Pages (from-to)S616-S619
    Number of pages3
    JournalJournal of Nuclear Materials
    Volume438
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed
    Event20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Aachen, Aachen, Germany
    Duration: 21 May 201225 May 2012

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