Integrating novel stellarator single-stage optimization algorithms to design the Columbia stellarator experiment
The Columbia Stellarator eXperiment (CSX), currently being designed at Columbia University, aims to test theoretical predictions related to QA plasma behavior, and to pioneer the construction of an optimized stellarator using three-dimensional, non-insulated high-temperature superconducting (NI-HTS)...
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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/ada6dd |
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| author | A. Baillod E.J. Paul G. Rawlinson M. Haque S.W. Freiberger S. Thapa |
| author_facet | A. Baillod E.J. Paul G. Rawlinson M. Haque S.W. Freiberger S. Thapa |
| author_sort | A. Baillod |
| collection | DOAJ |
| description | The Columbia Stellarator eXperiment (CSX), currently being designed at Columbia University, aims to test theoretical predictions related to QA plasma behavior, and to pioneer the construction of an optimized stellarator using three-dimensional, non-insulated high-temperature superconducting (NI-HTS) coils. The magnetic configuration is generated by a combination of two circular planar poloidal field (PF) coils and two 3D-shaped interlinked (IL) coils, with the possibility to add windowpane coils to enhance shaping and experimental flexibility. The PF coils and vacuum vessel are repurposed from the former Columbia Non-Neutral Torus experiment, while the IL coils will be custom-wound in-house using NI-HTS tapes. To obtain a plasma shape that meets the physics objectives with a limited number of coils, novel single-stage optimization techniques are employed, optimizing both the plasma and coils concurrently, in particular targeting a tight aspect ratio QA plasma and minimized strain on the HTS tape. Despite the increased complexity due to the expanded degrees of freedom, these methods successfully identify optimized plasma geometries that can be realized by coils meeting engineering specifications. This paper discusses the derivation of the constraints and objectives specific to CSX, and describe how two recently developed single-stage optimization methodologies are applied to the design of CSX. A set of selected configurations for CSX is then described in detail. |
| format | Article |
| id | doaj-art-83b2a44cef8540f2b972d6303eb4b34a |
| institution | Kabale University |
| issn | 0029-5515 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nuclear Fusion |
| spelling | doaj-art-83b2a44cef8540f2b972d6303eb4b34a2025-01-23T12:38:04ZengIOP PublishingNuclear Fusion0029-55152025-01-0165202604610.1088/1741-4326/ada6ddIntegrating novel stellarator single-stage optimization algorithms to design the Columbia stellarator experimentA. Baillod0https://orcid.org/0000-0003-0352-9180E.J. Paul1https://orcid.org/0000-0002-9355-5595G. Rawlinson2M. Haque3https://orcid.org/0009-0007-6194-1911S.W. Freiberger4https://orcid.org/0000-0002-3100-2661S. Thapa5https://orcid.org/0009-0004-6766-1599Department of Applied Physics and Applied Mathematics, Columbia University , New York, NY 10027, United States of AmericaDepartment of Applied Physics and Applied Mathematics, Columbia University , New York, NY 10027, United States of AmericaDepartment of Applied Physics and Applied Mathematics, Columbia University , New York, NY 10027, United States of AmericaDepartment of Applied Physics and Applied Mathematics, Columbia University , New York, NY 10027, United States of AmericaDepartment of Applied Physics and Applied Mathematics, Columbia University , New York, NY 10027, United States of AmericaDepartment of Applied Physics and Applied Mathematics, Columbia University , New York, NY 10027, United States of AmericaThe Columbia Stellarator eXperiment (CSX), currently being designed at Columbia University, aims to test theoretical predictions related to QA plasma behavior, and to pioneer the construction of an optimized stellarator using three-dimensional, non-insulated high-temperature superconducting (NI-HTS) coils. The magnetic configuration is generated by a combination of two circular planar poloidal field (PF) coils and two 3D-shaped interlinked (IL) coils, with the possibility to add windowpane coils to enhance shaping and experimental flexibility. The PF coils and vacuum vessel are repurposed from the former Columbia Non-Neutral Torus experiment, while the IL coils will be custom-wound in-house using NI-HTS tapes. To obtain a plasma shape that meets the physics objectives with a limited number of coils, novel single-stage optimization techniques are employed, optimizing both the plasma and coils concurrently, in particular targeting a tight aspect ratio QA plasma and minimized strain on the HTS tape. Despite the increased complexity due to the expanded degrees of freedom, these methods successfully identify optimized plasma geometries that can be realized by coils meeting engineering specifications. This paper discusses the derivation of the constraints and objectives specific to CSX, and describe how two recently developed single-stage optimization methodologies are applied to the design of CSX. A set of selected configurations for CSX is then described in detail.https://doi.org/10.1088/1741-4326/ada6ddoptimizationstellaratorCSXquasisymmetrycoilsingle-stage optimization |
| spellingShingle | A. Baillod E.J. Paul G. Rawlinson M. Haque S.W. Freiberger S. Thapa Integrating novel stellarator single-stage optimization algorithms to design the Columbia stellarator experiment Nuclear Fusion optimization stellarator CSX quasisymmetry coil single-stage optimization |
| title | Integrating novel stellarator single-stage optimization algorithms to design the Columbia stellarator experiment |
| title_full | Integrating novel stellarator single-stage optimization algorithms to design the Columbia stellarator experiment |
| title_fullStr | Integrating novel stellarator single-stage optimization algorithms to design the Columbia stellarator experiment |
| title_full_unstemmed | Integrating novel stellarator single-stage optimization algorithms to design the Columbia stellarator experiment |
| title_short | Integrating novel stellarator single-stage optimization algorithms to design the Columbia stellarator experiment |
| title_sort | integrating novel stellarator single stage optimization algorithms to design the columbia stellarator experiment |
| topic | optimization stellarator CSX quasisymmetry coil single-stage optimization |
| url | https://doi.org/10.1088/1741-4326/ada6dd |
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