Design of 3D equilibria and coils for steady-state operation of tokamaks
Inspired by the respective advantages of tokamaks and stellarators, we propose a quasi-axisymmetric (QA) tokamak-stellarator hybrid concept as a steady-state operation mode of standard tokamaks. Using stellarator optimization tools, we obtain compact 3D equilibria with good QA and sufficient (∼20%)...
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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/ada2a9 |
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| _version_ | 1841556206589575168 |
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| author | Yihui Liang Yao Zhou Fanghao Dong Caoxiang Zhu Guodong Yu Yuansheng Zhao Ge Dong |
| author_facet | Yihui Liang Yao Zhou Fanghao Dong Caoxiang Zhu Guodong Yu Yuansheng Zhao Ge Dong |
| author_sort | Yihui Liang |
| collection | DOAJ |
| description | Inspired by the respective advantages of tokamaks and stellarators, we propose a quasi-axisymmetric (QA) tokamak-stellarator hybrid concept as a steady-state operation mode of standard tokamaks. Using stellarator optimization tools, we obtain compact 3D equilibria with good QA and sufficient (∼20%) rotational transform generated by external coils to replace current drive, with the rest (∼80%) generated self-consistently by the bootstrap current. The equilibria can be supported by 3D saddle coils that are compatible with typical tokamak coils and reasonably feasible from engineering perspectives. We consider and compare designs with either high-field-side or low-field-side shaping, and find that the latter is favorable for coil optimization but unfavorable for generating rotational transform and achieving good QA. These results highlight a relatively unexplored region in the space of toroidal fusion configurations. |
| format | Article |
| id | doaj-art-09acf8096b2844c1bdb164b19ede4155 |
| institution | Kabale University |
| issn | 0029-5515 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nuclear Fusion |
| spelling | doaj-art-09acf8096b2844c1bdb164b19ede41552025-01-07T12:27:38ZengIOP PublishingNuclear Fusion0029-55152025-01-0165202603310.1088/1741-4326/ada2a9Design of 3D equilibria and coils for steady-state operation of tokamaksYihui Liang0https://orcid.org/0009-0006-1013-9526Yao Zhou1https://orcid.org/0000-0002-3616-2912Fanghao Dong2Caoxiang Zhu3https://orcid.org/0000-0003-2337-3232Guodong Yu4https://orcid.org/0000-0001-6522-8100Yuansheng Zhao5Ge Dong6https://orcid.org/0000-0002-7734-3736School of Physics and Astronomy, Institute of Natural Sciences, and MOE-LSC, Shanghai Jiao Tong University , Shanghai 200240, ChinaSchool of Physics and Astronomy, Institute of Natural Sciences, and MOE-LSC, Shanghai Jiao Tong University , Shanghai 200240, ChinaSchool of Physics and Astronomy, Institute of Natural Sciences, and MOE-LSC, Shanghai Jiao Tong University , Shanghai 200240, ChinaSchool of Nuclear Science and Technology and Key Laboratory of Frontier Physics in Controlled Nuclear Fusion, University of Science and Technology of China , Hefei, Anhui 230027, ChinaSchool of Nuclear Science and Technology and Key Laboratory of Frontier Physics in Controlled Nuclear Fusion, University of Science and Technology of China , Hefei, Anhui 230027, ChinaEnergy Singularity Fusion Power Technology (SH) Ltd , Shanghai, ChinaEnergy Singularity Fusion Power Technology (SH) Ltd , Shanghai, ChinaInspired by the respective advantages of tokamaks and stellarators, we propose a quasi-axisymmetric (QA) tokamak-stellarator hybrid concept as a steady-state operation mode of standard tokamaks. Using stellarator optimization tools, we obtain compact 3D equilibria with good QA and sufficient (∼20%) rotational transform generated by external coils to replace current drive, with the rest (∼80%) generated self-consistently by the bootstrap current. The equilibria can be supported by 3D saddle coils that are compatible with typical tokamak coils and reasonably feasible from engineering perspectives. We consider and compare designs with either high-field-side or low-field-side shaping, and find that the latter is favorable for coil optimization but unfavorable for generating rotational transform and achieving good QA. These results highlight a relatively unexplored region in the space of toroidal fusion configurations.https://doi.org/10.1088/1741-4326/ada2a9tokamakstellaratorquasi-axisymmetrybootstrap currentsaddle coils |
| spellingShingle | Yihui Liang Yao Zhou Fanghao Dong Caoxiang Zhu Guodong Yu Yuansheng Zhao Ge Dong Design of 3D equilibria and coils for steady-state operation of tokamaks Nuclear Fusion tokamak stellarator quasi-axisymmetry bootstrap current saddle coils |
| title | Design of 3D equilibria and coils for steady-state operation of tokamaks |
| title_full | Design of 3D equilibria and coils for steady-state operation of tokamaks |
| title_fullStr | Design of 3D equilibria and coils for steady-state operation of tokamaks |
| title_full_unstemmed | Design of 3D equilibria and coils for steady-state operation of tokamaks |
| title_short | Design of 3D equilibria and coils for steady-state operation of tokamaks |
| title_sort | design of 3d equilibria and coils for steady state operation of tokamaks |
| topic | tokamak stellarator quasi-axisymmetry bootstrap current saddle coils |
| url | https://doi.org/10.1088/1741-4326/ada2a9 |
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