Quantify typical trapping sites of deuterium in tungsten by sequential thermal desorption coupled with a dedicated numerical diffusion model
Pure tungsten (W) was irradiated by low-energy deuterium (D) at 335 and 500 K to investigate the effects of irradiation temperature on the concentration depth profiles (CDPs) of D-induced trapping sites and the retention behavior of D at these trapping sites. To quantify typical D trapping sites, a...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | Nuclear Fusion |
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| Online Access: | https://doi.org/10.1088/1741-4326/ad9ab8 |
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| _version_ | 1850142876849143808 |
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| author | Lin-Ping He Cong Li Jie Gao Wei Zhang Li-Qun Shi Hong-Liang Zhang |
| author_facet | Lin-Ping He Cong Li Jie Gao Wei Zhang Li-Qun Shi Hong-Liang Zhang |
| author_sort | Lin-Ping He |
| collection | DOAJ |
| description | Pure tungsten (W) was irradiated by low-energy deuterium (D) at 335 and 500 K to investigate the effects of irradiation temperature on the concentration depth profiles (CDPs) of D-induced trapping sites and the retention behavior of D at these trapping sites. To quantify typical D trapping sites, a novel approach was developed by combining experimental and theoretical analysis, including the sequential constant temperature thermal desorption to fast release D from irradiated W, in-situ ion beam analysis to obtain CDPs of retained D after desorption, and a one-dimensional diffusion model to simulate the diffusion, trapping and detrapping of D during desorption. The approach was verified through the microstructural characterization of irradiated W. It was revealed that the retentions of D in both near-surface and sub-surface layers were larger at the lower irradiation temperature (335 K) because of a higher density of D-induced dislocations and cavities in the corresponding regions. Employing the approach, the releasing behavior of D at four typical trapping sites, i.e. dislocations, mono-vacancies, grain boundaries and cavities was quantitatively analyzed. The approach with the capability to quantify typical D trapping sites provides a powerful tool for understanding the retention mechanism of D in the damaged W. |
| format | Article |
| id | doaj-art-04989a740ff548d38879b7dfd8161ec4 |
| institution | OA Journals |
| issn | 0029-5515 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nuclear Fusion |
| spelling | doaj-art-04989a740ff548d38879b7dfd8161ec42025-08-20T02:28:55ZengIOP PublishingNuclear Fusion0029-55152024-01-0165101605610.1088/1741-4326/ad9ab8Quantify typical trapping sites of deuterium in tungsten by sequential thermal desorption coupled with a dedicated numerical diffusion modelLin-Ping He0Cong Li1Jie Gao2https://orcid.org/0000-0002-4321-4063Wei Zhang3Li-Qun Shi4Hong-Liang Zhang5Key Laboratory of Nuclear Physics and Ion-Beam Application, Institute of Modern Physics, Fudan University , Shanghai 200433, ChinaKey Laboratory of Nuclear Physics and Ion-Beam Application, Institute of Modern Physics, Fudan University , Shanghai 200433, China; Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, ChinaKey Laboratory of Nuclear Physics and Ion-Beam Application, Institute of Modern Physics, Fudan University , Shanghai 200433, ChinaKey Laboratory of Nuclear Physics and Ion-Beam Application, Institute of Modern Physics, Fudan University , Shanghai 200433, ChinaKey Laboratory of Nuclear Physics and Ion-Beam Application, Institute of Modern Physics, Fudan University , Shanghai 200433, ChinaKey Laboratory of Nuclear Physics and Ion-Beam Application, Institute of Modern Physics, Fudan University , Shanghai 200433, ChinaPure tungsten (W) was irradiated by low-energy deuterium (D) at 335 and 500 K to investigate the effects of irradiation temperature on the concentration depth profiles (CDPs) of D-induced trapping sites and the retention behavior of D at these trapping sites. To quantify typical D trapping sites, a novel approach was developed by combining experimental and theoretical analysis, including the sequential constant temperature thermal desorption to fast release D from irradiated W, in-situ ion beam analysis to obtain CDPs of retained D after desorption, and a one-dimensional diffusion model to simulate the diffusion, trapping and detrapping of D during desorption. The approach was verified through the microstructural characterization of irradiated W. It was revealed that the retentions of D in both near-surface and sub-surface layers were larger at the lower irradiation temperature (335 K) because of a higher density of D-induced dislocations and cavities in the corresponding regions. Employing the approach, the releasing behavior of D at four typical trapping sites, i.e. dislocations, mono-vacancies, grain boundaries and cavities was quantitatively analyzed. The approach with the capability to quantify typical D trapping sites provides a powerful tool for understanding the retention mechanism of D in the damaged W.https://doi.org/10.1088/1741-4326/ad9ab8low-energy D irradiationtrapping sitesconcentration depth profilesconstant temperature thermal desorptionone-dimensional diffusion model |
| spellingShingle | Lin-Ping He Cong Li Jie Gao Wei Zhang Li-Qun Shi Hong-Liang Zhang Quantify typical trapping sites of deuterium in tungsten by sequential thermal desorption coupled with a dedicated numerical diffusion model Nuclear Fusion low-energy D irradiation trapping sites concentration depth profiles constant temperature thermal desorption one-dimensional diffusion model |
| title | Quantify typical trapping sites of deuterium in tungsten by sequential thermal desorption coupled with a dedicated numerical diffusion model |
| title_full | Quantify typical trapping sites of deuterium in tungsten by sequential thermal desorption coupled with a dedicated numerical diffusion model |
| title_fullStr | Quantify typical trapping sites of deuterium in tungsten by sequential thermal desorption coupled with a dedicated numerical diffusion model |
| title_full_unstemmed | Quantify typical trapping sites of deuterium in tungsten by sequential thermal desorption coupled with a dedicated numerical diffusion model |
| title_short | Quantify typical trapping sites of deuterium in tungsten by sequential thermal desorption coupled with a dedicated numerical diffusion model |
| title_sort | quantify typical trapping sites of deuterium in tungsten by sequential thermal desorption coupled with a dedicated numerical diffusion model |
| topic | low-energy D irradiation trapping sites concentration depth profiles constant temperature thermal desorption one-dimensional diffusion model |
| url | https://doi.org/10.1088/1741-4326/ad9ab8 |
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