Kinetic effects of thermal ions on internal kink modes in tokamak plasmas
Linear growth of internal kink mode is investigated using a kinetic-MHD hybrid simulation model under realistic tokamak conditions. By comparing purely fluid (single-fluid MHD) simulations with kinetic thermal ion simulations using various coupling schemes, it is demonstrated that thermal-ion effect...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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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/adf238 |
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| author | Jiangyue Han Yasushi Todo Hao Wang Masahiko Sato Jialei Wang |
| author_facet | Jiangyue Han Yasushi Todo Hao Wang Masahiko Sato Jialei Wang |
| author_sort | Jiangyue Han |
| collection | DOAJ |
| description | Linear growth of internal kink mode is investigated using a kinetic-MHD hybrid simulation model under realistic tokamak conditions. By comparing purely fluid (single-fluid MHD) simulations with kinetic thermal ion simulations using various coupling schemes, it is demonstrated that thermal-ion effects—including finite orbit width and ion pressure anisotropy—can significantly stabilize the internal kink mode. The maximum perturbation of distribution function aligns with resonance regions and near the passing-trapped boundary, indicating outward transport and redistribution of thermal ions. The net positive energy transfer from the mode to thermal ions leads to a reduction in growth rate. These results underscore the importance of incorporating thermal ion kinetics when modeling internal kink instabilities in fusion plasmas. |
| format | Article |
| id | doaj-art-a15b56d963ee4e00a2cef559b216a6dd |
| institution | Kabale University |
| issn | 0029-5515 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nuclear Fusion |
| spelling | doaj-art-a15b56d963ee4e00a2cef559b216a6dd2025-08-20T03:34:45ZengIOP PublishingNuclear Fusion0029-55152025-01-0165808604410.1088/1741-4326/adf238Kinetic effects of thermal ions on internal kink modes in tokamak plasmasJiangyue Han0https://orcid.org/0000-0002-6271-5170Yasushi Todo1Hao Wang2https://orcid.org/0000-0002-9819-7483Masahiko Sato3Jialei Wang4https://orcid.org/0000-0002-8678-8075The University of Tokyo , Kashiwa, Chiba 277-8561, JapanThe University of Tokyo , Kashiwa, Chiba 277-8561, Japan; National Institute for Fusion Science, National Institutes of Natural Sciences , Toki, Gifu 509-5292, JapanNational Institute for Fusion Science, National Institutes of Natural Sciences , Toki, Gifu 509-5292, JapanNational Institute for Fusion Science, National Institutes of Natural Sciences , Toki, Gifu 509-5292, JapanNational Institute for Fusion Science, National Institutes of Natural Sciences , Toki, Gifu 509-5292, JapanLinear growth of internal kink mode is investigated using a kinetic-MHD hybrid simulation model under realistic tokamak conditions. By comparing purely fluid (single-fluid MHD) simulations with kinetic thermal ion simulations using various coupling schemes, it is demonstrated that thermal-ion effects—including finite orbit width and ion pressure anisotropy—can significantly stabilize the internal kink mode. The maximum perturbation of distribution function aligns with resonance regions and near the passing-trapped boundary, indicating outward transport and redistribution of thermal ions. The net positive energy transfer from the mode to thermal ions leads to a reduction in growth rate. These results underscore the importance of incorporating thermal ion kinetics when modeling internal kink instabilities in fusion plasmas.https://doi.org/10.1088/1741-4326/adf238internal kink modehybrid simulationkinetic ion |
| spellingShingle | Jiangyue Han Yasushi Todo Hao Wang Masahiko Sato Jialei Wang Kinetic effects of thermal ions on internal kink modes in tokamak plasmas Nuclear Fusion internal kink mode hybrid simulation kinetic ion |
| title | Kinetic effects of thermal ions on internal kink modes in tokamak plasmas |
| title_full | Kinetic effects of thermal ions on internal kink modes in tokamak plasmas |
| title_fullStr | Kinetic effects of thermal ions on internal kink modes in tokamak plasmas |
| title_full_unstemmed | Kinetic effects of thermal ions on internal kink modes in tokamak plasmas |
| title_short | Kinetic effects of thermal ions on internal kink modes in tokamak plasmas |
| title_sort | kinetic effects of thermal ions on internal kink modes in tokamak plasmas |
| topic | internal kink mode hybrid simulation kinetic ion |
| url | https://doi.org/10.1088/1741-4326/adf238 |
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