FFC NMR relaxometer with magnetic flux density control
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.21/10330 |
Resumo: | This 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. |
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7160 |
spelling |
FFC NMR relaxometer with magnetic flux density controlRelaxometerFast field cyclingNuclear magnetic resonancePower supplyThis 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.MDPIRCIPLRoque, AntonioDuarte M. Sousa, DuarteSebastiao, PedroMargato, ElmanoMarques, Gil2019-07-19T08:28:55Z2019-07-132019-07-13T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/10330engROQUE, 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. 1-192079-9268https://doi.org/10.3390/jlpea9030022info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-03T10:00:08Zoai:repositorio.ipl.pt:10400.21/10330Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:18:46.507195Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
FFC NMR relaxometer with magnetic flux density control |
title |
FFC NMR relaxometer with magnetic flux density control |
spellingShingle |
FFC NMR relaxometer with magnetic flux density control Roque, Antonio Relaxometer Fast field cycling Nuclear magnetic resonance Power supply |
title_short |
FFC NMR relaxometer with magnetic flux density control |
title_full |
FFC NMR relaxometer with magnetic flux density control |
title_fullStr |
FFC NMR relaxometer with magnetic flux density control |
title_full_unstemmed |
FFC NMR relaxometer with magnetic flux density control |
title_sort |
FFC NMR relaxometer with magnetic flux density control |
author |
Roque, Antonio |
author_facet |
Roque, Antonio Duarte M. Sousa, Duarte Sebastiao, Pedro Margato, Elmano Marques, Gil |
author_role |
author |
author2 |
Duarte M. Sousa, Duarte Sebastiao, Pedro Margato, Elmano Marques, Gil |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
RCIPL |
dc.contributor.author.fl_str_mv |
Roque, Antonio Duarte M. Sousa, Duarte Sebastiao, Pedro Margato, Elmano Marques, Gil |
dc.subject.por.fl_str_mv |
Relaxometer Fast field cycling Nuclear magnetic resonance Power supply |
topic |
Relaxometer Fast field cycling Nuclear magnetic resonance Power supply |
description |
This 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. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-07-19T08:28:55Z 2019-07-13 2019-07-13T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.21/10330 |
url |
http://hdl.handle.net/10400.21/10330 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
ROQUE, 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. 1-19 2079-9268 https://doi.org/10.3390/jlpea9030022 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799133453188333568 |