Spatial and Temporal Variations of a Screening Current Induced Magnetic Field in a Double-Pancake HTS Insert of an LTS/HTS NMR Magnet
This paper presents experimental and simulation results of a screening current induced magnetic field (SCF) in a high temperature superconductor (HTS) insert that constitutes a low-/high-temperature superconductor (LTS/HTS) NMR magnet. In this experiment, the HTS insert, a stack of 50 double-pancake...
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| Format: | Article |
| Language: | en_US |
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Institute of Electrical and Electronics Engineers
2010
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| Online Access: | http://hdl.handle.net/1721.1/52009 https://orcid.org/0000-0001-5712-7350 |
| _version_ | 1811076920742248448 |
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| author | Ahn, Min Cheol Yagai, Tsuyoshi Hahn, Seung-Yong Ando, Ryuya Bascunan, Juan Iwasa, Yukikazu |
| author2 | Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology) |
| author_facet | Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology) Ahn, Min Cheol Yagai, Tsuyoshi Hahn, Seung-Yong Ando, Ryuya Bascunan, Juan Iwasa, Yukikazu |
| author_sort | Ahn, Min Cheol |
| collection | MIT |
| description | This paper presents experimental and simulation results of a screening current induced magnetic field (SCF) in a high temperature superconductor (HTS) insert that constitutes a low-/high-temperature superconductor (LTS/HTS) NMR magnet. In this experiment, the HTS insert, a stack of 50 double-pancake coils, each wound with Bi2223 tape, was operated at 77 K. A screening current was induced in the HTS insert by three magnetic field sources: 1) a self field from the HTS insert; 2) an external field from a 5-T background magnet; and 3) combinations of 1) and 2). For each field excitation, which induced an SCF, its axial field distribution and temporal variations were measured and compared with simulation results based on the critical state model. Agreement on field profile between experiment and simulation is satisfactory but more work is needed to make the simulation useful for designing shim coils that will cancel the SCF. |
| first_indexed | 2024-09-23T10:30:41Z |
| format | Article |
| id | mit-1721.1/52009 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:30:41Z |
| publishDate | 2010 |
| publisher | Institute of Electrical and Electronics Engineers |
| record_format | dspace |
| spelling | mit-1721.1/520092022-09-30T21:32:41Z Spatial and Temporal Variations of a Screening Current Induced Magnetic Field in a Double-Pancake HTS Insert of an LTS/HTS NMR Magnet Ahn, Min Cheol Yagai, Tsuyoshi Hahn, Seung-Yong Ando, Ryuya Bascunan, Juan Iwasa, Yukikazu Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology) Bascunan, Juan Ahn, Min Cheol Hahn, Seung-Yong Bascunan, Juan Iwasa, Yukikazu This paper presents experimental and simulation results of a screening current induced magnetic field (SCF) in a high temperature superconductor (HTS) insert that constitutes a low-/high-temperature superconductor (LTS/HTS) NMR magnet. In this experiment, the HTS insert, a stack of 50 double-pancake coils, each wound with Bi2223 tape, was operated at 77 K. A screening current was induced in the HTS insert by three magnetic field sources: 1) a self field from the HTS insert; 2) an external field from a 5-T background magnet; and 3) combinations of 1) and 2). For each field excitation, which induced an SCF, its axial field distribution and temporal variations were measured and compared with simulation results based on the critical state model. Agreement on field profile between experiment and simulation is satisfactory but more work is needed to make the simulation useful for designing shim coils that will cancel the SCF. Korea Research Foundation NIH National Center for Research Resources 2010-03-03T16:31:22Z 2010-03-03T16:31:22Z 2009-06 2008-08 Article http://purl.org/eprint/type/JournalArticle 1051-8223 http://hdl.handle.net/1721.1/52009 Min Cheol Ahn et al. “Spatial and Temporal Variations of a Screening Current Induced Magnetic Field in a Double-Pancake HTS Insert of an LTS/HTS NMR Magnet.” Applied Superconductivity, IEEE Transactions on 19.3 (2009): 2269-2272. © 2009 Institute of Electrical and Electronics Engineers https://orcid.org/0000-0001-5712-7350 en_US http://dx.doi.org/10.1109/tasc.2009.2018102 IEEE Transactions on Applied Superconductivity : a publication of the IEEE Superconductivity Committee Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Institute of Electrical and Electronics Engineers IEEE |
| spellingShingle | Ahn, Min Cheol Yagai, Tsuyoshi Hahn, Seung-Yong Ando, Ryuya Bascunan, Juan Iwasa, Yukikazu Spatial and Temporal Variations of a Screening Current Induced Magnetic Field in a Double-Pancake HTS Insert of an LTS/HTS NMR Magnet |
| title | Spatial and Temporal Variations of a Screening Current Induced Magnetic Field in a Double-Pancake HTS Insert of an LTS/HTS NMR Magnet |
| title_full | Spatial and Temporal Variations of a Screening Current Induced Magnetic Field in a Double-Pancake HTS Insert of an LTS/HTS NMR Magnet |
| title_fullStr | Spatial and Temporal Variations of a Screening Current Induced Magnetic Field in a Double-Pancake HTS Insert of an LTS/HTS NMR Magnet |
| title_full_unstemmed | Spatial and Temporal Variations of a Screening Current Induced Magnetic Field in a Double-Pancake HTS Insert of an LTS/HTS NMR Magnet |
| title_short | Spatial and Temporal Variations of a Screening Current Induced Magnetic Field in a Double-Pancake HTS Insert of an LTS/HTS NMR Magnet |
| title_sort | spatial and temporal variations of a screening current induced magnetic field in a double pancake hts insert of an lts hts nmr magnet |
| url | http://hdl.handle.net/1721.1/52009 https://orcid.org/0000-0001-5712-7350 |
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