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...

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Autores principales:	Dongkeun Park, Jiho Lee, Juan Bascuñán, Zhuyong Li, Yukikazu Iwasa
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/31d32175f3e14a029be68018cccb2fc9
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spelling	oai:doaj.org-article:31d32175f3e14a029be68018cccb2fc92021-12-02T13:58:15ZPrototype REBCO Z1 and Z2 shim coils for ultra high-field10.1038/s41598-020-78644-02045-2322https://doaj.org/article/31d32175f3e14a029be68018cccb2fc92020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78644-0https://doaj.org/toc/2045-2322Abstract 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.Dongkeun ParkJiho LeeJuan BascuñánZhuyong LiYukikazu IwasaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-7 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Dongkeun Park Jiho Lee Juan Bascuñán Zhuyong Li Yukikazu Iwasa Prototype REBCO Z1 and Z2 shim coils for ultra high-field
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.
format	article
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
title	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_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_sort	prototype rebco z1 and z2 shim coils for ultra high-field
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/31d32175f3e14a029be68018cccb2fc9
work_keys_str_mv	AT dongkeunpark prototyperebcoz1andz2shimcoilsforultrahighfield AT jiholee prototyperebcoz1andz2shimcoilsforultrahighfield AT juanbascunan prototyperebcoz1andz2shimcoilsforultrahighfield AT zhuyongli prototyperebcoz1andz2shimcoilsforultrahighfield AT yukikazuiwasa prototyperebcoz1andz2shimcoilsforultrahighfield
_version_	1718392189871980544

Prototype REBCO Z1 and Z2 shim coils for ultra high-field

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