Simulations of tungsten fuzz growth and erosion under He/Ar mixed plasma irradiation on LP-MIES
Extrinsic noble impurities seeding has been commonly used to reduce the heat flux on divertor target. However, the physical sputtering yield on the target could be obviously enhanced due to larger mass of noble impurities. On the other hand, it has been reported that tungsten fuzz can suppress the p...
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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/S2352179124002205 |
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| author | K.R. Yang J.Y. Chen C.R. Zu W.Y. Ni D.P. Liu S.G. Liu B. Cui S.Y. Dai |
| author_facet | K.R. Yang J.Y. Chen C.R. Zu W.Y. Ni D.P. Liu S.G. Liu B. Cui S.Y. Dai |
| author_sort | K.R. Yang |
| collection | DOAJ |
| description | Extrinsic noble impurities seeding has been commonly used to reduce the heat flux on divertor target. However, the physical sputtering yield on the target could be obviously enhanced due to larger mass of noble impurities. On the other hand, it has been reported that tungsten fuzz can suppress the physical sputtering due to the trapping effect on sputtered particles. Hence, it is interesting to check the erosion behaviors of tungsten fuzz under the irradiation of noble impurities. Recently, experiments of He/Ar mixed plasma irradiation on W target were conducted on LP-MIES device. Dedicated simulations have been performed by SURO-FUZZ code to study the impact of Ar flux on fuzz growth and erosion, which can well reproduce the experimental measurements on LP-MIES. For the case of pure He incidence, the growth of porous nanostructure leads to an obvious reduction in the fraction of the implanted He particles, which stabilizes to 15 % when the fuzz layer thickness exceeds 1500 nm. For He/Ar mixed plasma irradiation, the dependence of the position of the net sputtering on the local porosity has been investigated in detail. It is found that the net physical sputtering mainly occurs in the regions with the local porosity larger than 0.6. |
| format | Article |
| id | doaj-art-67553a38e1534eeba18bf511c867b531 |
| 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-67553a38e1534eeba18bf511c867b5312025-08-20T01:57:00ZengElsevierNuclear Materials and Energy2352-17912024-12-014110179710.1016/j.nme.2024.101797Simulations of tungsten fuzz growth and erosion under He/Ar mixed plasma irradiation on LP-MIESK.R. Yang0J.Y. Chen1C.R. Zu2W.Y. Ni3D.P. Liu4S.G. Liu5B. Cui6S.Y. Dai7Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, PR ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, PR ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, PR ChinaSchool of Electrical Engineering, Dalian University of Technology, Dalian 116024, PR ChinaSchool of Electrical Engineering, Dalian University of Technology, Dalian 116024, PR ChinaSchool of Science, Qingdao University of Technology, Qingdao 266520, PR ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, PR ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, PR China; Corresponding author.Extrinsic noble impurities seeding has been commonly used to reduce the heat flux on divertor target. However, the physical sputtering yield on the target could be obviously enhanced due to larger mass of noble impurities. On the other hand, it has been reported that tungsten fuzz can suppress the physical sputtering due to the trapping effect on sputtered particles. Hence, it is interesting to check the erosion behaviors of tungsten fuzz under the irradiation of noble impurities. Recently, experiments of He/Ar mixed plasma irradiation on W target were conducted on LP-MIES device. Dedicated simulations have been performed by SURO-FUZZ code to study the impact of Ar flux on fuzz growth and erosion, which can well reproduce the experimental measurements on LP-MIES. For the case of pure He incidence, the growth of porous nanostructure leads to an obvious reduction in the fraction of the implanted He particles, which stabilizes to 15 % when the fuzz layer thickness exceeds 1500 nm. For He/Ar mixed plasma irradiation, the dependence of the position of the net sputtering on the local porosity has been investigated in detail. It is found that the net physical sputtering mainly occurs in the regions with the local porosity larger than 0.6.http://www.sciencedirect.com/science/article/pii/S2352179124002205Tungsten fuzzSimulationSURO-FUZZ |
| spellingShingle | K.R. Yang J.Y. Chen C.R. Zu W.Y. Ni D.P. Liu S.G. Liu B. Cui S.Y. Dai Simulations of tungsten fuzz growth and erosion under He/Ar mixed plasma irradiation on LP-MIES Nuclear Materials and Energy Tungsten fuzz Simulation SURO-FUZZ |
| title | Simulations of tungsten fuzz growth and erosion under He/Ar mixed plasma irradiation on LP-MIES |
| title_full | Simulations of tungsten fuzz growth and erosion under He/Ar mixed plasma irradiation on LP-MIES |
| title_fullStr | Simulations of tungsten fuzz growth and erosion under He/Ar mixed plasma irradiation on LP-MIES |
| title_full_unstemmed | Simulations of tungsten fuzz growth and erosion under He/Ar mixed plasma irradiation on LP-MIES |
| title_short | Simulations of tungsten fuzz growth and erosion under He/Ar mixed plasma irradiation on LP-MIES |
| title_sort | simulations of tungsten fuzz growth and erosion under he ar mixed plasma irradiation on lp mies |
| topic | Tungsten fuzz Simulation SURO-FUZZ |
| url | http://www.sciencedirect.com/science/article/pii/S2352179124002205 |
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