Investigation of deuterium trapping and release in the JET ITER-like wall divertor using TDS and TMAP
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 (...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019-05-01
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| Series: | Nuclear Materials and Energy |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179118302904 |
| _version_ | 1818056155943927808 |
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| author | J. Likonen K. Heinola A. De Backer A. Baron-Wiechec N. Catarino I. Jepu C.F. Ayres P. Coad S. Koivuranta S. Krat G.F. Matthews M. Mayer A. Widdowson |
| author_facet | J. Likonen K. Heinola A. De Backer A. Baron-Wiechec N. Catarino I. Jepu C.F. Ayres P. Coad S. Koivuranta S. Krat G.F. Matthews M. Mayer A. Widdowson |
| author_sort | J. Likonen |
| collection | DOAJ |
| description | 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 |
| first_indexed | 2024-12-10T12:24:21Z |
| format | Article |
| id | doaj.art-9621faec750f444f9d352805adb7ee96 |
| institution | Directory Open Access Journal |
| issn | 2352-1791 |
| language | English |
| last_indexed | 2024-12-10T12:24:21Z |
| publishDate | 2019-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj.art-9621faec750f444f9d352805adb7ee962022-12-22T01:48:59ZengElsevierNuclear Materials and Energy2352-17912019-05-0119166178Investigation of deuterium trapping and release in the JET ITER-like wall divertor using TDS and TMAPJ. Likonen0K. Heinola1A. De Backer2A. Baron-Wiechec3N. Catarino4I. Jepu5C.F. Ayres6P. Coad7S. Koivuranta8S. Krat9G.F. Matthews10M. Mayer11A. Widdowson12VTT Technical Research Centre of Finland, P.O. Box 1000, FIN-02044 VTT, Finland; Corresponding author.University of Helsinki, P.O. Box 64, 00560 Helsinki, FinlandCCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, UKCCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, UKIPFN Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, PortugalCCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, UK; National Institute for Laser, Plasma and Radiation Physics (NILPRP), Magurele 077125, RomaniaCCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, UKCCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, UKVTT Technical Research Centre of Finland, P.O. Box 1000, FIN-02044 VTT, FinlandMax-Planck-Institut für Plasmaphysik, EURATOM Association, Boltzmannstr. 2, D-85748 Garching, Germany; National Research Nuclear University (MEPhI), Kashirskoe Road 31, Moscow 115409, RussiaCCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, UKMax-Planck-Institut für Plasmaphysik, EURATOM Association, Boltzmannstr. 2, D-85748 Garching, GermanyCCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, UKSelected 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, TDShttp://www.sciencedirect.com/science/article/pii/S2352179118302904 |
| spellingShingle | J. Likonen K. Heinola A. De Backer A. Baron-Wiechec N. Catarino I. Jepu C.F. Ayres P. Coad S. Koivuranta S. Krat G.F. Matthews M. Mayer A. Widdowson Investigation of deuterium trapping and release in the JET ITER-like wall divertor using TDS and TMAP Nuclear Materials and Energy |
| title | Investigation of deuterium trapping and release in the JET ITER-like wall divertor using TDS and TMAP |
| title_full | Investigation of deuterium trapping and release in the JET ITER-like wall divertor using TDS and TMAP |
| title_fullStr | Investigation of deuterium trapping and release in the JET ITER-like wall divertor using TDS and TMAP |
| title_full_unstemmed | Investigation of deuterium trapping and release in the JET ITER-like wall divertor using TDS and TMAP |
| title_short | Investigation of deuterium trapping and release in the JET ITER-like wall divertor using TDS and TMAP |
| title_sort | investigation of deuterium trapping and release in the jet iter like wall divertor using tds and tmap |
| url | http://www.sciencedirect.com/science/article/pii/S2352179118302904 |
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