Thermal desorption spectrometry of beryllium plasma facing tiles exposed in the JET tokamak

Aleksandra Baron-Wiechec (Corresponding Author), Kalle Heinola, Jari Likonen, Eduardo de Alves, Norberto Catarino, Valeria Corregidor, Paul Coad, Ionut Jepu, Guy Matthews, Anna Widdowson

    Research output: Contribution to journalArticleScientificpeer-review

    18 Citations (Scopus)

    Abstract

    The phenomena of retention and de-trapping of deuterium (D) and tritium (T) in plasma facing components (PFC) and supporting structures must be understood in order to limit or control total T inventory in larger future fusion devices such as ITER, DEMO and commercial machines. The goal of this paper is to present details of the thermal desorption spectrometry (TDS) system applied in total fuel retention assessment of PFC at the Joint European Torus (JET). Examples of TDS results from beryllium (Be) wall tile samples exposed to JET plasma in PFC configuration mirroring the planned ITER PFC is shown for the first time. The method for quantifying D by comparison of results from a sample of known D content was confirmed acceptable. The D inventory calculations obtained from Ion Beam Analysis (IBA) and TDS agree well within an error associated with the extrapolation from very few data points to a large surface area.
    Original languageEnglish
    Pages (from-to)135–141
    JournalFusion Engineering and Design
    Volume133
    DOIs
    Publication statusPublished - 2018
    MoE publication typeA1 Journal article-refereed

    Funding

    This work has been carried out within the framework of the EUROFusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under grant agreement No 633053 and from the RCUK Energy Programme [grant number EP/P012450/1]. The views and opinions expressed herein do not necessarily reflect those of the European Commission. The research used UKAEA’s Materials Research Facility, which has been funded by and is part of the UK’s National Nuclear User Facility and Henry Royce Institute for Advanced Materials.

    Keywords

    • Thermal desorption spectrometry
    • Beryllium
    • Plasma facing component
    • Fuel retention
    • JET
    • Tritium

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