Normal high velocity solid dust impacts on tiles of tokamak-relevant temperature
Runaway electron incidence on plasma facing components triggers explosive events that are accompanied by the expulsion of fast solid debris. Subsequent dust-wall high speed impacts constitute a mechanism of wall damage and dust destruction. Empirical damage laws that can be employed for erosion esti...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-12-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179124001583 |
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| author | Marco De Angeli Panagiotis Tolias Francisco Suzuki-Vidal Dario Ripamonti Tim Ringrose Hugo Doyle Giambattista Daminelli Jay Shadbolt Peter Jarvis Monica De Angeli |
| author_facet | Marco De Angeli Panagiotis Tolias Francisco Suzuki-Vidal Dario Ripamonti Tim Ringrose Hugo Doyle Giambattista Daminelli Jay Shadbolt Peter Jarvis Monica De Angeli |
| author_sort | Marco De Angeli |
| collection | DOAJ |
| description | Runaway electron incidence on plasma facing components triggers explosive events that are accompanied by the expulsion of fast solid debris. Subsequent dust-wall high speed impacts constitute a mechanism of wall damage and dust destruction. Empirical damage laws that can be employed for erosion estimates are based on room-temperature impact experiments. We use light-gas gun shooting systems to accelerate solid tungsten dust to near-supersonic speeds towards bulk tungsten targets that are maintained at different temperatures. This concerns targets cooled down to −100°C with liquid nitrogen and targets resistively heated up to 400 °C. Post-mortem surface analysis reveals that the three erosion regimes (plastic deformation, bonding, partial disintegration) weakly depend on the target temperature within the investigated range. It is concluded that empirical damage laws based on room-temperature measurements can be safely employed for predictions. |
| format | Article |
| id | doaj-art-e79daf6aaad943829800dccb5eb71fdd |
| institution | OA Journals |
| issn | 2352-1791 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj-art-e79daf6aaad943829800dccb5eb71fdd2025-08-20T02:34:56ZengElsevierNuclear Materials and Energy2352-17912024-12-014110173510.1016/j.nme.2024.101735Normal high velocity solid dust impacts on tiles of tokamak-relevant temperatureMarco De Angeli0Panagiotis Tolias1Francisco Suzuki-Vidal2Dario Ripamonti3Tim Ringrose4Hugo Doyle5Giambattista Daminelli6Jay Shadbolt7Peter Jarvis8Monica De Angeli9Institute for Plasma Science and Technology - CNR, via Cozzi 53, 20125 Milano, Italy; Corresponding author.Space and Plasma Physics - KTH Royal Institute of Technology, Teknikringen 31, 10044 Stockholm, SwedenFirst Light Fusion, Unit 10, Oxford Pioneer Park, Mead Road, Yarnton, Kidlington, Oxford, OX5 1QU, UKInstitute of Condensed Matter Chemistry and Energy Technologies - CNR, via Cozzi 53, 20125 Milano, ItalyFirst Light Fusion, Unit 10, Oxford Pioneer Park, Mead Road, Yarnton, Kidlington, Oxford, OX5 1QU, UKFirst Light Fusion, Unit 10, Oxford Pioneer Park, Mead Road, Yarnton, Kidlington, Oxford, OX5 1QU, UKInstitute of Condensed Matter Chemistry and Energy Technologies - CNR, via Cozzi 53, 20125 Milano, ItalyFirst Light Fusion, Unit 10, Oxford Pioneer Park, Mead Road, Yarnton, Kidlington, Oxford, OX5 1QU, UKFirst Light Fusion, Unit 10, Oxford Pioneer Park, Mead Road, Yarnton, Kidlington, Oxford, OX5 1QU, UKInstitute for Plasma Science and Technology - CNR, via Cozzi 53, 20125 Milano, ItalyRunaway electron incidence on plasma facing components triggers explosive events that are accompanied by the expulsion of fast solid debris. Subsequent dust-wall high speed impacts constitute a mechanism of wall damage and dust destruction. Empirical damage laws that can be employed for erosion estimates are based on room-temperature impact experiments. We use light-gas gun shooting systems to accelerate solid tungsten dust to near-supersonic speeds towards bulk tungsten targets that are maintained at different temperatures. This concerns targets cooled down to −100°C with liquid nitrogen and targets resistively heated up to 400 °C. Post-mortem surface analysis reveals that the three erosion regimes (plastic deformation, bonding, partial disintegration) weakly depend on the target temperature within the investigated range. It is concluded that empirical damage laws based on room-temperature measurements can be safely employed for predictions.http://www.sciencedirect.com/science/article/pii/S2352179124001583Runaway electron impactDust in tokamaksMechanical impactsWall crateringDamage laws |
| spellingShingle | Marco De Angeli Panagiotis Tolias Francisco Suzuki-Vidal Dario Ripamonti Tim Ringrose Hugo Doyle Giambattista Daminelli Jay Shadbolt Peter Jarvis Monica De Angeli Normal high velocity solid dust impacts on tiles of tokamak-relevant temperature Nuclear Materials and Energy Runaway electron impact Dust in tokamaks Mechanical impacts Wall cratering Damage laws |
| title | Normal high velocity solid dust impacts on tiles of tokamak-relevant temperature |
| title_full | Normal high velocity solid dust impacts on tiles of tokamak-relevant temperature |
| title_fullStr | Normal high velocity solid dust impacts on tiles of tokamak-relevant temperature |
| title_full_unstemmed | Normal high velocity solid dust impacts on tiles of tokamak-relevant temperature |
| title_short | Normal high velocity solid dust impacts on tiles of tokamak-relevant temperature |
| title_sort | normal high velocity solid dust impacts on tiles of tokamak relevant temperature |
| topic | Runaway electron impact Dust in tokamaks Mechanical impacts Wall cratering Damage laws |
| url | http://www.sciencedirect.com/science/article/pii/S2352179124001583 |
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