Beryllium layer response to ITER-like ELM plasma pulses in QSPA-Be
Material migration in ITER is expected to move beryllium (Be) eroded from the first wall primarily to the tungsten (W) divertor region and to magnetically shadowed areas of the wall itself. This paper is concerned with experimental study of Be layer response to ELM-like plasma pulses using the new Q...
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| Format: | Article |
| Language: | English |
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Elsevier
2017-08-01
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| Series: | Nuclear Materials and Energy |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179116301570 |
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| author | N.S. Klimov V.L. Podkovyrov I.B. Kupriyanov J. Linke R.A. Pitts V.M. Safronov D.V. Kovalenko Th. Loewenhoff C.P. Lungu G. Pintsuk G. De Temmerman A.D. Muzichenko A.A. Markin P.N. Taratorkin N.E. Zabirova A.M. Zhitlukhin |
| author_facet | N.S. Klimov V.L. Podkovyrov I.B. Kupriyanov J. Linke R.A. Pitts V.M. Safronov D.V. Kovalenko Th. Loewenhoff C.P. Lungu G. Pintsuk G. De Temmerman A.D. Muzichenko A.A. Markin P.N. Taratorkin N.E. Zabirova A.M. Zhitlukhin |
| author_sort | N.S. Klimov |
| collection | DOAJ |
| description | Material migration in ITER is expected to move beryllium (Be) eroded from the first wall primarily to the tungsten (W) divertor region and to magnetically shadowed areas of the wall itself. This paper is concerned with experimental study of Be layer response to ELM-like plasma pulses using the new QSPA-Be plasma gun (SRC RF TRINITI). The Be layers (1→50µm thick) are deposited on special castellated Be and W targets supplied by the ITER Organization using the Thermionic Vacuum Arc technique. Transient deuterium plasma pulses with duration ∼0.5ms were selected to provide absorbed energy densities on the plasma stream axis for a 30° target inclination of 0.2 and 0.5MJm−2, the first well below and the second near the Be melting point. This latter value is close to the prescribed maximum energy density for controlled ELMs on ITER. At 0.2MJm−2 on W, all Be layer thicknesses tested retain their integrity up to the maximum pulse number, except at local defects (flakes, holes and cracks) and on tile edges. At 0.5MJm−2 on W, Be layer melting and melt layer agglomeration are the main damage processes, they happen immediately in the first plasma impact. Melt layer movement was observed only near plasma facing edges. No significant melt splashing is observed in spite of high plasma pressure (higher than expected in ITER). Be layer of 10µm thick on Be target has higher resistance to plasma irradiation than 1 and 55µm, and retain their integrity up to the maximum pulse number at 0.2MJm−2. For 1µm and 55µm thick on Be target significant Be layer losses were observed at 0.2MJm−2. Keywords: ITER, High heat flux, Thermal shock, Beryllium, Tungsten, Coating |
| first_indexed | 2024-12-14T18:12:37Z |
| format | Article |
| id | doaj.art-a802a24f5c994979bda9611b5b0e7e50 |
| institution | Directory Open Access Journal |
| issn | 2352-1791 |
| language | English |
| last_indexed | 2024-12-14T18:12:37Z |
| publishDate | 2017-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj.art-a802a24f5c994979bda9611b5b0e7e502022-12-21T22:52:16ZengElsevierNuclear Materials and Energy2352-17912017-08-0112433440Beryllium layer response to ITER-like ELM plasma pulses in QSPA-BeN.S. Klimov0V.L. Podkovyrov1I.B. Kupriyanov2J. Linke3R.A. Pitts4V.M. Safronov5D.V. Kovalenko6Th. Loewenhoff7C.P. Lungu8G. Pintsuk9G. De Temmerman10A.D. Muzichenko11A.A. Markin12P.N. Taratorkin13N.E. Zabirova14A.M. Zhitlukhin15SRC RF TRINITI, ul. Pushkovykh, vladenie 12, Troitsk, Moscow 108840, Russia; National Research Nuclear University «MEPhI», Kashirskoe sh. 31, Moscow 115409, Russia; Corresponding author at: Troitsk, ul. Pushkovikh, vladenie 12, SRC RF TRINITI, Moscow 108840, Russian Federation.SRC RF TRINITI, ul. Pushkovykh, vladenie 12, Troitsk, Moscow 108840, RussiaBochvar Institute, ul. Rogova, 5a, Moscow 123098, RussiaForschungszentrum Jülich GmbH, Jülich D-52425, GermanyITER Organization, Route de Vinon-sur-Verdon, CS 90 046, St. Paul Lez Durance Cedex, 13067, FranceInstitution Project center ITER, Akademika Kurchatova pl., 1, Moscow 123182, RussiaSRC RF TRINITI, ul. Pushkovykh, vladenie 12, Troitsk, Moscow 108840, RussiaForschungszentrum Jülich GmbH, Jülich D-52425, GermanyNational Institute for Laser, Plasma and Radiation Physics, Bucharest 077125, RomaniaForschungszentrum Jülich GmbH, Jülich D-52425, GermanyITER Organization, Route de Vinon-sur-Verdon, CS 90 046, St. Paul Lez Durance Cedex, 13067, FranceSRC RF TRINITI, ul. Pushkovykh, vladenie 12, Troitsk, Moscow 108840, RussiaBochvar Institute, ul. Rogova, 5a, Moscow 123098, RussiaBochvar Institute, ul. Rogova, 5a, Moscow 123098, RussiaBochvar Institute, ul. Rogova, 5a, Moscow 123098, RussiaSRC RF TRINITI, ul. Pushkovykh, vladenie 12, Troitsk, Moscow 108840, RussiaMaterial migration in ITER is expected to move beryllium (Be) eroded from the first wall primarily to the tungsten (W) divertor region and to magnetically shadowed areas of the wall itself. This paper is concerned with experimental study of Be layer response to ELM-like plasma pulses using the new QSPA-Be plasma gun (SRC RF TRINITI). The Be layers (1→50µm thick) are deposited on special castellated Be and W targets supplied by the ITER Organization using the Thermionic Vacuum Arc technique. Transient deuterium plasma pulses with duration ∼0.5ms were selected to provide absorbed energy densities on the plasma stream axis for a 30° target inclination of 0.2 and 0.5MJm−2, the first well below and the second near the Be melting point. This latter value is close to the prescribed maximum energy density for controlled ELMs on ITER. At 0.2MJm−2 on W, all Be layer thicknesses tested retain their integrity up to the maximum pulse number, except at local defects (flakes, holes and cracks) and on tile edges. At 0.5MJm−2 on W, Be layer melting and melt layer agglomeration are the main damage processes, they happen immediately in the first plasma impact. Melt layer movement was observed only near plasma facing edges. No significant melt splashing is observed in spite of high plasma pressure (higher than expected in ITER). Be layer of 10µm thick on Be target has higher resistance to plasma irradiation than 1 and 55µm, and retain their integrity up to the maximum pulse number at 0.2MJm−2. For 1µm and 55µm thick on Be target significant Be layer losses were observed at 0.2MJm−2. Keywords: ITER, High heat flux, Thermal shock, Beryllium, Tungsten, Coatinghttp://www.sciencedirect.com/science/article/pii/S2352179116301570 |
| spellingShingle | N.S. Klimov V.L. Podkovyrov I.B. Kupriyanov J. Linke R.A. Pitts V.M. Safronov D.V. Kovalenko Th. Loewenhoff C.P. Lungu G. Pintsuk G. De Temmerman A.D. Muzichenko A.A. Markin P.N. Taratorkin N.E. Zabirova A.M. Zhitlukhin Beryllium layer response to ITER-like ELM plasma pulses in QSPA-Be Nuclear Materials and Energy |
| title | Beryllium layer response to ITER-like ELM plasma pulses in QSPA-Be |
| title_full | Beryllium layer response to ITER-like ELM plasma pulses in QSPA-Be |
| title_fullStr | Beryllium layer response to ITER-like ELM plasma pulses in QSPA-Be |
| title_full_unstemmed | Beryllium layer response to ITER-like ELM plasma pulses in QSPA-Be |
| title_short | Beryllium layer response to ITER-like ELM plasma pulses in QSPA-Be |
| title_sort | beryllium layer response to iter like elm plasma pulses in qspa be |
| url | http://www.sciencedirect.com/science/article/pii/S2352179116301570 |
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