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Waveform Control Pulsed Field Magnetization of RE-Ba-Cu-O Bulk Superconducting Rings

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cam.depositDate2021-12-10
cam.issuedOnline2021-12-03
cam.orpheus.success2021-12-10 - Embargo set during processing via Fast-track
datacite.issupplementedby.urlhttps://doi.org/10.17863/CAM.75432
dc.contributor.authorTsui, YK
dc.contributor.authorMoseley, D
dc.contributor.authorDennis, AR
dc.contributor.authorShi, Y
dc.contributor.authorBeck, M
dc.contributor.authorCientanni, V
dc.contributor.authorCardwell, D
dc.contributor.authorDurrell, J
dc.contributor.authorAinslie, M
dc.contributor.orcidMoseley, D [0000-0001-7673-0024]
dc.contributor.orcidBeck, M [0000-0003-4476-3803]
dc.contributor.orcidCardwell, D [0000-0002-2020-2131]
dc.contributor.orcidDurrell, J [0000-0003-0712-3102]
dc.contributor.orcidAinslie, M [0000-0003-0466-3680]
dc.date.accessioned2021-12-11T00:31:34Z
dc.date.available2021-12-11T00:31:34Z
dc.date.issued2022
dc.date.updated2021-12-10T12:41:39Z
dc.description.abstractOne of the potential applications of ring-shaped, single grain RE-Ba-Cu-O bulk superconductors is in desktop magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR) systems as an alternative to conventional permanent magnets. The higher magnetic field available from magnetized bulk superconductors could significantly improve the performance of such systems, as well as reduce their size and increase portability. The pulsed field magnetization (PFM) method provides a fast, compact and cost-effective method for magnetizing these materials as trapped field magnets. However, bulk superconducting rings are very suscep-tible to thermomagnetic instabilities during the PFM process, and thus, to date, the reported trapped fields in ring bulks magnet-ized by PFM are less than 0.35 T at the centre of single rings. In this work, we demonstrate that the trapped field in a super-conducting ring bulk can be enhanced significantly by optimizing the waveform of the magnetizing pulse used in the PFM method. This optimization can be achieved easily by using an Insulated Gate Bipolar Transistor as a fast-switching device with a control-lable switching frequency in the pulse-generating electric circuit. Our findings represent a key step forward in utilizing bulk, sin-gle-grain superconducting rings magnetized by PFM in portable magnet systems.
dc.identifier.doi10.17863/CAM.78795
dc.identifier.eissn1558-2515
dc.identifier.issn1051-8223
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/331347
dc.language.isoeng
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.publisher.departmentDepartment of Engineering
dc.publisher.urlhttp://dx.doi.org/10.1109/tasc.2021.3132553
dc.rightsAll Rights Reserved
dc.rights.urihttp://www.rioxx.net/licenses/all-rights-reserved
dc.subjectSuperconducting magnets
dc.subjectMagnetic resonance imaging
dc.subjectMagnetic field measurement
dc.subjectMagnetic flux
dc.subjectInsulated gate bipolar transistors
dc.subjectHigh-temperature superconductors
dc.subjectVoltage measurement
dc.subjectHigh-temperature superconductivity
dc.subjectbulk superconductors
dc.subjectbulk superconducting rings
dc.subjecttrapped field magnets
dc.subjectpulsed field magnetization
dc.subjectwaveform control
dc.titleWaveform Control Pulsed Field Magnetization of RE-Ba-Cu-O Bulk Superconducting Rings
dc.typeArticle
dcterms.dateAccepted2021-11-30
prism.endingPage1
prism.publicationDate2021
prism.publicationNameIEEE Transactions on Applied Superconductivity
prism.startingPage1
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/P020313/1)
pubs.funder-project-idEPSRC (EP/T014679/1)
pubs.licence-display-nameApollo Repository Deposit Licence Agreement
pubs.licence-identifierapollo-deposit-licence-2-1
rioxxterms.typeJournal Article/Review
rioxxterms.versionAM
rioxxterms.versionofrecord10.1109/TASC.2021.3132553

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