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FFC NMR relaxometer with magnetic flux density control

2019-07-13Journal article Open access
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dc.contributor.authorRoque, Antonio
dc.contributor.authorDuarte M. Sousa, Duarte
dc.contributor.authorSebastiao, Pedro
dc.contributor.authorMargato, Elmano
dc.contributor.authorMarques, Gil
dc.date.accessioned2019-07-19T08:28:55Z
dc.date.available2019-07-19T08:28:55Z
dc.date.issued2019-07-13
dc.description.abstractThis paper describes an innovative solution for the power supply of a fast field cycling (FFC) nuclear magnetic resonance (NMR) spectrometer considering its low power consumption, portability and low cost. In FFC cores, the magnetic flux density must be controlled in order to perform magnetic flux density cycles with short transients, while maintaining the magnetic flux density levels with high accuracy and homogeneity. Typical solutions in the FFC NMR literature use current control to get the required magnetic flux density cycles, which correspond to an indirect magnetic flux density control. The main feature of this new relaxometer is the direct control of the magnetic flux density instead of the magnet current, in contrast with other equipment available in the market. This feature is a great progress because it improves the performance. With this solution it is possible to compensate magnetic field disturbances and parasitic magnetic fields guaranteeing, among other possibilities, a field control below the earth magnetic field. Experimental results validating the developed solution and illustrating the real operation of this type of equipment are shown.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationROQUE, António; [et al] – FFC NMR relaxometer with magnetic flux density control. Journal of Low Power Electronics and Applications. ISSN 2079-9268. Vol. 9, N.º 3 (2019), pp. 1-19pt_PT
dc.identifier.doihttps://doi.org/10.3390/jlpea9030022pt_PT
dc.identifier.issn2079-9268
dc.identifier.urihttp://hdl.handle.net/10400.21/10330
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationUID/CEC/50021/2019 - IPSetúbal, ISEL, IPLisboa, FCTpt_PT
dc.relationUID/CTM/04540/2019 - IPSetúbal, ISEL, IPLisboa, FCTpt_PT
dc.subjectRelaxometerpt_PT
dc.subjectFast field cyclingpt_PT
dc.subjectNuclear magnetic resonancept_PT
dc.subjectPower supplypt_PT
dc.titleFFC NMR relaxometer with magnetic flux density controlpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage19pt_PT
oaire.citation.issue3pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleJournal of Low Power Electronics and Applicationspt_PT
oaire.citation.volume9pt_PT
person.familyNameRoque
person.familyNameSousa
person.familyNameSebastião
person.familyNameMargato
person.givenNameAntonio
person.givenNameDuarte
person.givenNamePedro
person.givenNameElmano
person.identifier.ciencia-id3412-5E09-7B16
person.identifier.ciencia-idBC19-99BC-F439
person.identifier.ciencia-id2F12-3295-B091
person.identifier.orcid0000-0002-9146-8607
person.identifier.orcid0000-0003-3519-205X
person.identifier.orcid0000-0001-7729-4033
person.identifier.orcid0000-0002-8601-9145
person.identifier.ridN-7737-2013
person.identifier.scopus-author-id6701686403
person.identifier.scopus-author-id55900519300
person.identifier.scopus-author-id6505972972
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication37fe854a-095f-4a0e-abc4-a04d4b5ccb89
relation.isAuthorOfPublication94331707-d0a0-4cbe-8b74-65a7cf5aef28
relation.isAuthorOfPublicationda79da5e-35f8-4d2a-b5df-662df364dc0c
relation.isAuthorOfPublication9f983bef-f0ef-4660-b6e9-e9beebaf6acc
relation.isAuthorOfPublication.latestForDiscovery37fe854a-095f-4a0e-abc4-a04d4b5ccb89

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