Simulations of tungsten sputtering and transport behaviors on EAST using JOREK
The sputtering and transport of tungsten (W) impurity in the EAST tokamak have been investigated by the nonlinear magnetohydrodynamic code JOREK. The hybrid kinetic-fluid model in JOREK enables us to study the impacts of the Larmor gyration, sheath acceleration and, W sputtering energy and D ^+ impi...
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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/adde70 |
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| author | Y.L. Liu D. Hu S.Y. Dai Z. Liang Z.H. Gao Y. Feng M. Hoelzl S.Q. Korving G.T.A. Huijsmans L. Wang D.Z. Wang the JOREK Team |
| author_facet | Y.L. Liu D. Hu S.Y. Dai Z. Liang Z.H. Gao Y. Feng M. Hoelzl S.Q. Korving G.T.A. Huijsmans L. Wang D.Z. Wang the JOREK Team |
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| description | The sputtering and transport of tungsten (W) impurity in the EAST tokamak have been investigated by the nonlinear magnetohydrodynamic code JOREK. The hybrid kinetic-fluid model in JOREK enables us to study the impacts of the Larmor gyration, sheath acceleration and, W sputtering energy and D ^+ impinging energy on the W sputtering and transport, which are generally simplified and ignored in fluid transport codes. The simulated W gross erosion flux exhibits a reasonable agreement with the measured data obtained through spectroscopy diagnostics on EAST. By means of the kinetic model in JOREK, it is indicated that the gyration and sheath effects can enhance the W redeposition probability on divertor targets by around three times compared to the fluid treatment. Moreover, the Thompson energy distribution for sputtered W particles has been attempted to survey the influence of the W sputtering energy on the W transport and redeposition, which shows a small discrepancy in the mean free path and redeposition probability of W particles compared to the case with a fixed sputtering energy. The detailed analysis of the W sputtering under the Maxwellian velocity distribution has been conducted, revealing significantly higher W erosion and leakage compared to the monoenergetic case. Eventually, the combined effects of the Larmor gyration, sheath acceleration, W sputtering energy and D ^+ impinging energy on W transport and redeposition behaviors have been investigated under varying plasma scenarios. It is found that the prompt redeposition of W particles plays a dominant role in the entire W redeposition compared to the long-range redeposition. |
| format | Article |
| id | doaj-art-19027967eb7c4dd98e6d36d03f03ecb9 |
| institution | OA Journals |
| issn | 0029-5515 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | Nuclear Fusion |
| spelling | doaj-art-19027967eb7c4dd98e6d36d03f03ecb92025-08-20T02:03:31ZengIOP PublishingNuclear Fusion0029-55152025-01-0165707601410.1088/1741-4326/adde70Simulations of tungsten sputtering and transport behaviors on EAST using JOREKY.L. Liu0D. Hu1https://orcid.org/0000-0001-7099-5734S.Y. Dai2https://orcid.org/0000-0001-6384-8437Z. Liang3https://orcid.org/0000-0002-7887-0837Z.H. Gao4https://orcid.org/0009-0004-1217-6959Y. Feng5M. Hoelzl6S.Q. Korving7G.T.A. Huijsmans8L. Wang9https://orcid.org/0000-0002-8373-117XD.Z. Wang10https://orcid.org/0000-0003-0517-7318the JOREK TeamKey Laboratory of Materials Modification by Laser , Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, ChinaBeihang University , No. 37 Xueyuan Road, Haidian District, 100191 Beijing, ChinaKey Laboratory of Materials Modification by Laser , Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser , Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser , Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser , Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, ChinaMax Planck Institute for Plasma Physics , Boltzmannstr. 2, 85748 Garching, GermanyEindhoven University of Technology , PO Box 513, 5600 MB Eindhoven, Netherlands; ITER Organization , 13067 St. Paul Lez Durance Cedex, FranceCEA , IRFM, F-13108 Saint-Paul-lez-Durance, FranceInstitute of Plasma Physics , Chinese Academy of Sciences, Hefei 230031, ChinaKey Laboratory of Materials Modification by Laser , Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, ChinaThe sputtering and transport of tungsten (W) impurity in the EAST tokamak have been investigated by the nonlinear magnetohydrodynamic code JOREK. The hybrid kinetic-fluid model in JOREK enables us to study the impacts of the Larmor gyration, sheath acceleration and, W sputtering energy and D ^+ impinging energy on the W sputtering and transport, which are generally simplified and ignored in fluid transport codes. The simulated W gross erosion flux exhibits a reasonable agreement with the measured data obtained through spectroscopy diagnostics on EAST. By means of the kinetic model in JOREK, it is indicated that the gyration and sheath effects can enhance the W redeposition probability on divertor targets by around three times compared to the fluid treatment. Moreover, the Thompson energy distribution for sputtered W particles has been attempted to survey the influence of the W sputtering energy on the W transport and redeposition, which shows a small discrepancy in the mean free path and redeposition probability of W particles compared to the case with a fixed sputtering energy. The detailed analysis of the W sputtering under the Maxwellian velocity distribution has been conducted, revealing significantly higher W erosion and leakage compared to the monoenergetic case. Eventually, the combined effects of the Larmor gyration, sheath acceleration, W sputtering energy and D ^+ impinging energy on W transport and redeposition behaviors have been investigated under varying plasma scenarios. It is found that the prompt redeposition of W particles plays a dominant role in the entire W redeposition compared to the long-range redeposition.https://doi.org/10.1088/1741-4326/adde70tungsten sputteringimpurity transportJOREK |
| spellingShingle | Y.L. Liu D. Hu S.Y. Dai Z. Liang Z.H. Gao Y. Feng M. Hoelzl S.Q. Korving G.T.A. Huijsmans L. Wang D.Z. Wang the JOREK Team Simulations of tungsten sputtering and transport behaviors on EAST using JOREK Nuclear Fusion tungsten sputtering impurity transport JOREK |
| title | Simulations of tungsten sputtering and transport behaviors on EAST using JOREK |
| title_full | Simulations of tungsten sputtering and transport behaviors on EAST using JOREK |
| title_fullStr | Simulations of tungsten sputtering and transport behaviors on EAST using JOREK |
| title_full_unstemmed | Simulations of tungsten sputtering and transport behaviors on EAST using JOREK |
| title_short | Simulations of tungsten sputtering and transport behaviors on EAST using JOREK |
| title_sort | simulations of tungsten sputtering and transport behaviors on east using jorek |
| topic | tungsten sputtering impurity transport JOREK |
| url | https://doi.org/10.1088/1741-4326/adde70 |
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