Measurement of Magnetic Field Properties of a 3.0 T/m Air-core HTS Quadrupole Magnet and Optimal Shape Design to Increase the Critical Current Reduced by the Incident Magnetic Field
Air-core high-temperature superconducting quadrupole magnets (AHQMs) differ from conventional iron-core quadrupole magnets, in that their iron cores are removed, and instead high-temperature superconductors (HTSs) are applied. The high operating temperature and high thermal stability of HTS magnets...
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Multidisciplinary Digital Publishing Institute
2020
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| Online Access: | https://hdl.handle.net/1721.1/125418 |
| _version_ | 1811084241486741504 |
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| author | Choi, Yojong Kim, Junseong Baek, Geonwoo Han, Seunghak Lee, Seung Woo Ko, Tae Kuk |
| author2 | Massachusetts Institute of Technology. Plasma Science and Fusion Center |
| author_facet | Massachusetts Institute of Technology. Plasma Science and Fusion Center Choi, Yojong Kim, Junseong Baek, Geonwoo Han, Seunghak Lee, Seung Woo Ko, Tae Kuk |
| author_sort | Choi, Yojong |
| collection | MIT |
| description | Air-core high-temperature superconducting quadrupole magnets (AHQMs) differ from conventional iron-core quadrupole magnets, in that their iron cores are removed, and instead high-temperature superconductors (HTSs) are applied. The high operating temperature and high thermal stability of HTS magnets can improve their thermodynamic cooling efficiency. Thus, HTS magnets are more suitable than low temperature superconducting magnets for withstanding radiation and high heat loads in the hot cells of accelerators. AHQMs are advantageous because they are compact, light, and free from the hysteresis of ferromagnetic materials, due to the removal of the iron-core. To verify the feasibility of the use of AHQMs, we designed and fabricated a 3.0 T/m AHQM. The magnetic field properties of the fabricated AHQM were evaluated. Additionally, the characteristics of the air-core model and iron-core model of 9.0 T/m were compared in the scale for practical operation. In comparison with the iron-core model, AHQM significantly reduces the critical current (I[subscript C]) due to the strong magnetic field inside the coil. In this study, a method for the accurate calculation of I[subscript C] is introduced, and the calculated results are compared with measured results. Furthermore, the optimal shape design of the AHQM to increase the critical current is introduced. Keywords: air-core quadrupole magnet; critical current degradation; heavy-lon accelerator; high-temperature superconductor; iron-core quadrupole magnet; optimum shape design |
| first_indexed | 2024-09-23T12:47:30Z |
| format | Article |
| id | mit-1721.1/125418 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T12:47:30Z |
| publishDate | 2020 |
| publisher | Multidisciplinary Digital Publishing Institute |
| record_format | dspace |
| spelling | mit-1721.1/1254182022-09-28T10:03:28Z Measurement of Magnetic Field Properties of a 3.0 T/m Air-core HTS Quadrupole Magnet and Optimal Shape Design to Increase the Critical Current Reduced by the Incident Magnetic Field Choi, Yojong Kim, Junseong Baek, Geonwoo Han, Seunghak Lee, Seung Woo Ko, Tae Kuk Massachusetts Institute of Technology. Plasma Science and Fusion Center Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology) Air-core high-temperature superconducting quadrupole magnets (AHQMs) differ from conventional iron-core quadrupole magnets, in that their iron cores are removed, and instead high-temperature superconductors (HTSs) are applied. The high operating temperature and high thermal stability of HTS magnets can improve their thermodynamic cooling efficiency. Thus, HTS magnets are more suitable than low temperature superconducting magnets for withstanding radiation and high heat loads in the hot cells of accelerators. AHQMs are advantageous because they are compact, light, and free from the hysteresis of ferromagnetic materials, due to the removal of the iron-core. To verify the feasibility of the use of AHQMs, we designed and fabricated a 3.0 T/m AHQM. The magnetic field properties of the fabricated AHQM were evaluated. Additionally, the characteristics of the air-core model and iron-core model of 9.0 T/m were compared in the scale for practical operation. In comparison with the iron-core model, AHQM significantly reduces the critical current (I[subscript C]) due to the strong magnetic field inside the coil. In this study, a method for the accurate calculation of I[subscript C] is introduced, and the calculated results are compared with measured results. Furthermore, the optimal shape design of the AHQM to increase the critical current is introduced. Keywords: air-core quadrupole magnet; critical current degradation; heavy-lon accelerator; high-temperature superconductor; iron-core quadrupole magnet; optimum shape design Korea Electric Power Corporation (Grant R17XA05_32) “Human Resources Program in Energy Technology” of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry and Energy, Republic of Korea. (No. 20184030202270) 2020-05-22T18:40:58Z 2020-05-22T18:40:58Z 2020-03 2020-03 2020-03-13T13:09:24Z Article http://purl.org/eprint/type/JournalArticle 2079-9292 https://hdl.handle.net/1721.1/125418 Choi, Yojong, et al. "Measurement of Magnetic Field Properties of a 3.0 T/m Air-Core HTS Quadrupole Magnet and Optimal Shape Design to Increase the Critical Current Reduced by the Incident Magnetic Field ." Electronics, 9 (March 2020), 450. © 2020 The Author(s) http://dx.doi.org/10.3390/electronics9030450 Electronics Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ application/pdf Multidisciplinary Digital Publishing Institute Multidisciplinary Digital Publishing Institute |
| spellingShingle | Choi, Yojong Kim, Junseong Baek, Geonwoo Han, Seunghak Lee, Seung Woo Ko, Tae Kuk Measurement of Magnetic Field Properties of a 3.0 T/m Air-core HTS Quadrupole Magnet and Optimal Shape Design to Increase the Critical Current Reduced by the Incident Magnetic Field |
| title | Measurement of Magnetic Field Properties of a 3.0 T/m Air-core HTS Quadrupole Magnet and Optimal Shape Design to Increase the Critical Current Reduced by the Incident Magnetic Field |
| title_full | Measurement of Magnetic Field Properties of a 3.0 T/m Air-core HTS Quadrupole Magnet and Optimal Shape Design to Increase the Critical Current Reduced by the Incident Magnetic Field |
| title_fullStr | Measurement of Magnetic Field Properties of a 3.0 T/m Air-core HTS Quadrupole Magnet and Optimal Shape Design to Increase the Critical Current Reduced by the Incident Magnetic Field |
| title_full_unstemmed | Measurement of Magnetic Field Properties of a 3.0 T/m Air-core HTS Quadrupole Magnet and Optimal Shape Design to Increase the Critical Current Reduced by the Incident Magnetic Field |
| title_short | Measurement of Magnetic Field Properties of a 3.0 T/m Air-core HTS Quadrupole Magnet and Optimal Shape Design to Increase the Critical Current Reduced by the Incident Magnetic Field |
| title_sort | measurement of magnetic field properties of a 3 0 t m air core hts quadrupole magnet and optimal shape design to increase the critical current reduced by the incident magnetic field |
| url | https://hdl.handle.net/1721.1/125418 |
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