Deuterium retention in tungsten oxide: the role of oxide damage
Tungsten (W) is a common plasma-facing material in nuclear fusion devices. It readily oxidizes in the presence of oxygen, forming tungsten oxides, particularly WO _3 , which may modify deuterium retention. This experimental study investigates mechanisms of the evolution of deuterium retention in a t...
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IOP Publishing
2025-01-01
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| Series: | Nuclear Fusion |
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| Online Access: | https://doi.org/10.1088/1741-4326/addfea |
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| author | Mykola Ialovega Celine Martin Cédric Pardanaud Elodie Bernard Martiane Cabié Andrea Campos Christian Grisolia Marco Minissale Thomas Neisius Thierry Angot Régis Bisson |
| author_facet | Mykola Ialovega Celine Martin Cédric Pardanaud Elodie Bernard Martiane Cabié Andrea Campos Christian Grisolia Marco Minissale Thomas Neisius Thierry Angot Régis Bisson |
| author_sort | Mykola Ialovega |
| collection | DOAJ |
| description | Tungsten (W) is a common plasma-facing material in nuclear fusion devices. It readily oxidizes in the presence of oxygen, forming tungsten oxides, particularly WO _3 , which may modify deuterium retention. This experimental study investigates mechanisms of the evolution of deuterium retention in a thermally stable ${\sim}100$ nm WO _3 layer grown by thermal oxidation of a W substrate at 1073 K under low pure oxygen pressure of 7 Pa. 500 eV D $_2^+$ deuterium implantation and Temperature Programmed Desorption (TPD) were used to explore deuterium trapping and release from the oxide as a function of incident ion fluence and storage time in ultra high vacuum. Upon deuterium irradiation, the formation of a W-rich layer on the surface of the oxide is evidenced with x-ray photoelectron spectroscopy. After successive implantation/TPD cycles corresponding to an accumulated deuterium fluence ${\gt}10^{21}$ D m ^−2 , the appearance of an amorphous oxide encapsulated between two W-rich layers is observed with transmission electron microscopy. Following this high fluence deuterium implantation, deuterium retention increases by a factor of 10. The findings provide insight into the behavior of tungsten oxides under deuterium implantation, emphasizing the importance of considering its thermal stability and its structural modifications at the surface of tungsten plasma facing components. |
| format | Article |
| id | doaj-art-f48ccb2c724a4419a8cc0c0e3b5a40cc |
| institution | Kabale University |
| issn | 0029-5515 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | Nuclear Fusion |
| spelling | doaj-art-f48ccb2c724a4419a8cc0c0e3b5a40cc2025-08-20T03:45:10ZengIOP PublishingNuclear Fusion0029-55152025-01-0165707602410.1088/1741-4326/addfeaDeuterium retention in tungsten oxide: the role of oxide damageMykola Ialovega0https://orcid.org/0000-0003-0041-8039Celine Martin1https://orcid.org/0000-0002-4704-3273Cédric Pardanaud2https://orcid.org/0000-0001-8974-4396Elodie Bernard3https://orcid.org/0000-0002-9291-7654Martiane Cabié4Andrea Campos5Christian Grisolia6Marco Minissale7https://orcid.org/0000-0001-6331-1402Thomas Neisius8Thierry Angot9Régis Bisson10https://orcid.org/0000-0002-8819-1563CEA, IRFM , F-13108 Saint Paul-lez-Durance, France; Aix Marseille Univ. , CNRS, PIIM, UMR 7345, 13013 Marseille, France; University of Wisconsin-Madison , Department of Engineering Physics, 3DPSI, 1500 Engineering Drive,53706 Madison, WI, United States of AmericaAix Marseille Univ. , CNRS, PIIM, UMR 7345, 13013 Marseille, FranceAix Marseille Univ. , CNRS, PIIM, UMR 7345, 13013 Marseille, FranceCEA, IRFM , F-13108 Saint Paul-lez-Durance, FranceAix Marseille Univ. , CNRS, Centrale Marseille, FSCM (FR1739), CP2M, 13397 Marseille, FranceAix Marseille Univ. , CNRS, Centrale Marseille, FSCM (FR1739), CP2M, 13397 Marseille, FranceCEA, IRFM , F-13108 Saint Paul-lez-Durance, FranceAix Marseille Univ. , CNRS, PIIM, UMR 7345, 13013 Marseille, FranceAix Marseille Univ. , CNRS, Centrale Marseille, FSCM (FR1739), CP2M, 13397 Marseille, FranceAix Marseille Univ. , CNRS, PIIM, UMR 7345, 13013 Marseille, FranceAix Marseille Univ. , CNRS, PIIM, UMR 7345, 13013 Marseille, FranceTungsten (W) is a common plasma-facing material in nuclear fusion devices. It readily oxidizes in the presence of oxygen, forming tungsten oxides, particularly WO _3 , which may modify deuterium retention. This experimental study investigates mechanisms of the evolution of deuterium retention in a thermally stable ${\sim}100$ nm WO _3 layer grown by thermal oxidation of a W substrate at 1073 K under low pure oxygen pressure of 7 Pa. 500 eV D $_2^+$ deuterium implantation and Temperature Programmed Desorption (TPD) were used to explore deuterium trapping and release from the oxide as a function of incident ion fluence and storage time in ultra high vacuum. Upon deuterium irradiation, the formation of a W-rich layer on the surface of the oxide is evidenced with x-ray photoelectron spectroscopy. After successive implantation/TPD cycles corresponding to an accumulated deuterium fluence ${\gt}10^{21}$ D m ^−2 , the appearance of an amorphous oxide encapsulated between two W-rich layers is observed with transmission electron microscopy. Following this high fluence deuterium implantation, deuterium retention increases by a factor of 10. The findings provide insight into the behavior of tungsten oxides under deuterium implantation, emphasizing the importance of considering its thermal stability and its structural modifications at the surface of tungsten plasma facing components.https://doi.org/10.1088/1741-4326/addfeatungstenoxideretentiondeuteriumTEM |
| spellingShingle | Mykola Ialovega Celine Martin Cédric Pardanaud Elodie Bernard Martiane Cabié Andrea Campos Christian Grisolia Marco Minissale Thomas Neisius Thierry Angot Régis Bisson Deuterium retention in tungsten oxide: the role of oxide damage Nuclear Fusion tungsten oxide retention deuterium TEM |
| title | Deuterium retention in tungsten oxide: the role of oxide damage |
| title_full | Deuterium retention in tungsten oxide: the role of oxide damage |
| title_fullStr | Deuterium retention in tungsten oxide: the role of oxide damage |
| title_full_unstemmed | Deuterium retention in tungsten oxide: the role of oxide damage |
| title_short | Deuterium retention in tungsten oxide: the role of oxide damage |
| title_sort | deuterium retention in tungsten oxide the role of oxide damage |
| topic | tungsten oxide retention deuterium TEM |
| url | https://doi.org/10.1088/1741-4326/addfea |
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