Investigation of deuterium trapping and release in the JET ITER-like wall divertor using TDS and TMAP

JET Contributors

    Research output: Contribution to journalArticleScientificpeer-review

    1 Citation (Scopus)

    Abstract

    Selected set of samples from JET ITER-Like Wall (JET-ILW) divertor tiles exposed both in 2013–2014 and 2011–2014 has been analysed using Thermal Desorption Spectrometry (TDS). The deuterium (D) amounts obtained with TDS were compared with Ion Beam Analysis (IBA) and Secondary Ion Mass Spectrometry (SIMS) data. The highest amount of D was found on the top part of inner divertor which has regions with the thickest deposited layers. This area resides deep in the scrape-off layer. Changes in plasma configurations between the first (2011–2012) and the second (2013–2014) JET-ILW campaign altered the material migration towards the inner and the outer divertor corner increasing the amount of deposition in the shadowed areas of the divertor base tiles. D retention on the outer divertor tiles is clearly smaller than on the inner divertor tiles. Experimental TDS spectra for samples from the top part of inner divertor and from the outer strike point region were modelled using TMAP program. Experimental deuterium profiles obtained with SIMS have been used and the detrapping and the activation energies have been adjusted. Analysis of the results of the TMAP simulations enabled to determine the nature of traps in different samples.

    Original languageEnglish
    Pages (from-to)166-178
    Number of pages13
    JournalNuclear Materials and Energy
    Volume19
    DOIs
    Publication statusPublished - 2 Mar 2019
    MoE publication typeNot Eligible

    Fingerprint

    Thermal desorption
    Deuterium
    Tile
    Spectrometry
    deuterium
    desorption
    trapping
    tiles
    Secondary ion mass spectrometry
    spectroscopy
    secondary ion mass spectrometry
    Ion beams
    Activation energy
    Plasmas
    4,4',5'-trimethylazapsoralen
    ion beams
    traps
    activation energy
    profiles
    configurations

    Keywords

    • Fuel retention
    • JET
    • TDS

    Cite this

    @article{2f21a0366aa14a43893c8eb502ec5189,
    title = "Investigation of deuterium trapping and release in the JET ITER-like wall divertor using TDS and TMAP",
    abstract = "Selected set of samples from JET ITER-Like Wall (JET-ILW) divertor tiles exposed both in 2013–2014 and 2011–2014 has been analysed using Thermal Desorption Spectrometry (TDS). The deuterium (D) amounts obtained with TDS were compared with Ion Beam Analysis (IBA) and Secondary Ion Mass Spectrometry (SIMS) data. The highest amount of D was found on the top part of inner divertor which has regions with the thickest deposited layers. This area resides deep in the scrape-off layer. Changes in plasma configurations between the first (2011–2012) and the second (2013–2014) JET-ILW campaign altered the material migration towards the inner and the outer divertor corner increasing the amount of deposition in the shadowed areas of the divertor base tiles. D retention on the outer divertor tiles is clearly smaller than on the inner divertor tiles. Experimental TDS spectra for samples from the top part of inner divertor and from the outer strike point region were modelled using TMAP program. Experimental deuterium profiles obtained with SIMS have been used and the detrapping and the activation energies have been adjusted. Analysis of the results of the TMAP simulations enabled to determine the nature of traps in different samples.",
    keywords = "Fuel retention, JET, TDS",
    author = "J. Likonen and K. Heinola and {De Backer}, A. and A. Baron-Wiechec and N. Catarino and I. Jepu and Ayres, {C. F.} and P. Coad and S. Koivuranta and S. Krat and Matthews, {G. F.} and M. Mayer and A. Widdowson and {JET Contributors}",
    year = "2019",
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    language = "English",
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    Investigation of deuterium trapping and release in the JET ITER-like wall divertor using TDS and TMAP. / JET Contributors.

    In: Nuclear Materials and Energy, Vol. 19, 02.03.2019, p. 166-178.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Investigation of deuterium trapping and release in the JET ITER-like wall divertor using TDS and TMAP

    AU - Likonen, J.

    AU - Heinola, K.

    AU - De Backer, A.

    AU - Baron-Wiechec, A.

    AU - Catarino, N.

    AU - Jepu, I.

    AU - Ayres, C. F.

    AU - Coad, P.

    AU - Koivuranta, S.

    AU - Krat, S.

    AU - Matthews, G. F.

    AU - Mayer, M.

    AU - Widdowson, A.

    AU - JET Contributors

    PY - 2019/3/2

    Y1 - 2019/3/2

    N2 - Selected set of samples from JET ITER-Like Wall (JET-ILW) divertor tiles exposed both in 2013–2014 and 2011–2014 has been analysed using Thermal Desorption Spectrometry (TDS). The deuterium (D) amounts obtained with TDS were compared with Ion Beam Analysis (IBA) and Secondary Ion Mass Spectrometry (SIMS) data. The highest amount of D was found on the top part of inner divertor which has regions with the thickest deposited layers. This area resides deep in the scrape-off layer. Changes in plasma configurations between the first (2011–2012) and the second (2013–2014) JET-ILW campaign altered the material migration towards the inner and the outer divertor corner increasing the amount of deposition in the shadowed areas of the divertor base tiles. D retention on the outer divertor tiles is clearly smaller than on the inner divertor tiles. Experimental TDS spectra for samples from the top part of inner divertor and from the outer strike point region were modelled using TMAP program. Experimental deuterium profiles obtained with SIMS have been used and the detrapping and the activation energies have been adjusted. Analysis of the results of the TMAP simulations enabled to determine the nature of traps in different samples.

    AB - Selected set of samples from JET ITER-Like Wall (JET-ILW) divertor tiles exposed both in 2013–2014 and 2011–2014 has been analysed using Thermal Desorption Spectrometry (TDS). The deuterium (D) amounts obtained with TDS were compared with Ion Beam Analysis (IBA) and Secondary Ion Mass Spectrometry (SIMS) data. The highest amount of D was found on the top part of inner divertor which has regions with the thickest deposited layers. This area resides deep in the scrape-off layer. Changes in plasma configurations between the first (2011–2012) and the second (2013–2014) JET-ILW campaign altered the material migration towards the inner and the outer divertor corner increasing the amount of deposition in the shadowed areas of the divertor base tiles. D retention on the outer divertor tiles is clearly smaller than on the inner divertor tiles. Experimental TDS spectra for samples from the top part of inner divertor and from the outer strike point region were modelled using TMAP program. Experimental deuterium profiles obtained with SIMS have been used and the detrapping and the activation energies have been adjusted. Analysis of the results of the TMAP simulations enabled to determine the nature of traps in different samples.

    KW - Fuel retention

    KW - JET

    KW - TDS

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    DO - 10.1016/j.nme.2019.02.031

    M3 - Article

    AN - SCOPUS:85062280297

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    SP - 166

    EP - 178

    JO - Nuclear Materials and Energy

    JF - Nuclear Materials and Energy

    SN - 2352-1791

    ER -