Prototype REBCO Z1 and Z2 shim coils for ultra high-field
Abstract We present promising results of novel high-temperature superconducting (HTS) shim coil prototypes that circumvent the size and strength limitation of our earlier innovative HTS shim concept based on 46-mm wide REBCO tape. The HTS shim coil is placed inside the HTS magnet, mainly for ultra-h...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2020-12-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-020-78644-0 |
| _version_ | 1818754009668780032 |
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| author | Dongkeun Park Jiho Lee Juan Bascuñán Zhuyong Li Yukikazu Iwasa |
| author_facet | Dongkeun Park Jiho Lee Juan Bascuñán Zhuyong Li Yukikazu Iwasa |
| author_sort | Dongkeun Park |
| collection | DOAJ |
| description | Abstract We present promising results of novel high-temperature superconducting (HTS) shim coil prototypes that circumvent the size and strength limitation of our earlier innovative HTS shim concept based on 46-mm wide REBCO tape. The HTS shim coil is placed inside the HTS magnet, mainly for ultra-high-field (> 1 GHz or 23.5 T) NMR magnets, and thus unaffected from the windings’ diamagnetic wall effects. One full-scale version will be applied to clean up Z1 and Z2 harmonic errors in the MIT 1.3-GHz high-resolution NMR magnet composed of an 835-MHz HTS insert, while another version for an MIT 1-GHz microcoil NMR magnet whose small-scale model we are currently building. The prototype sets were wound with a 2-pile, 1.03-mm wide, 0.30-mm thick REBCO conductor. Operated at 77 K, the Z1 shim set generated a 1st harmonic field strength of 179 kHz/cm at 70 A, while the Z2 shim set, composed of two pairs, Z21 and Z22, generated the 2nd harmonic field of 141 kHz/cm2 at 50 A. Together with discussion on technical challenges for this REBCO shim coil concept, we demonstrate its feasibility for the next generation of ultra-high-field (UHF) HTS NMR magnets. |
| first_indexed | 2024-12-18T05:16:26Z |
| format | Article |
| id | doaj.art-31d32175f3e14a029be68018cccb2fc9 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-18T05:16:26Z |
| publishDate | 2020-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-31d32175f3e14a029be68018cccb2fc92022-12-21T21:19:45ZengNature PortfolioScientific Reports2045-23222020-12-011011710.1038/s41598-020-78644-0Prototype REBCO Z1 and Z2 shim coils for ultra high-fieldDongkeun Park0Jiho Lee1Juan Bascuñán2Zhuyong Li3Yukikazu Iwasa4Francis Bitter Magnet Laboratory/Plasma Science and Fusion Center, Massachusetts Institute of TechnologyInstitute for Basic ScienceFrancis Bitter Magnet Laboratory/Plasma Science and Fusion Center, Massachusetts Institute of TechnologyDepartment of Electrical Engineering, Shanghai Jiao Tong UniversityFrancis Bitter Magnet Laboratory/Plasma Science and Fusion Center, Massachusetts Institute of TechnologyAbstract We present promising results of novel high-temperature superconducting (HTS) shim coil prototypes that circumvent the size and strength limitation of our earlier innovative HTS shim concept based on 46-mm wide REBCO tape. The HTS shim coil is placed inside the HTS magnet, mainly for ultra-high-field (> 1 GHz or 23.5 T) NMR magnets, and thus unaffected from the windings’ diamagnetic wall effects. One full-scale version will be applied to clean up Z1 and Z2 harmonic errors in the MIT 1.3-GHz high-resolution NMR magnet composed of an 835-MHz HTS insert, while another version for an MIT 1-GHz microcoil NMR magnet whose small-scale model we are currently building. The prototype sets were wound with a 2-pile, 1.03-mm wide, 0.30-mm thick REBCO conductor. Operated at 77 K, the Z1 shim set generated a 1st harmonic field strength of 179 kHz/cm at 70 A, while the Z2 shim set, composed of two pairs, Z21 and Z22, generated the 2nd harmonic field of 141 kHz/cm2 at 50 A. Together with discussion on technical challenges for this REBCO shim coil concept, we demonstrate its feasibility for the next generation of ultra-high-field (UHF) HTS NMR magnets.https://doi.org/10.1038/s41598-020-78644-0 |
| spellingShingle | Dongkeun Park Jiho Lee Juan Bascuñán Zhuyong Li Yukikazu Iwasa Prototype REBCO Z1 and Z2 shim coils for ultra high-field Scientific Reports |
| title | Prototype REBCO Z1 and Z2 shim coils for ultra high-field |
| title_full | Prototype REBCO Z1 and Z2 shim coils for ultra high-field |
| title_fullStr | Prototype REBCO Z1 and Z2 shim coils for ultra high-field |
| title_full_unstemmed | Prototype REBCO Z1 and Z2 shim coils for ultra high-field |
| title_short | Prototype REBCO Z1 and Z2 shim coils for ultra high-field |
| title_sort | prototype rebco z1 and z2 shim coils for ultra high field |
| url | https://doi.org/10.1038/s41598-020-78644-0 |
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