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Simulating different modes of current transfer to thermionic cathodes in a wide range of conditions

2009Journal article Open access
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dc.contributor.authorBenilov, M. S.
dc.contributor.authorCunha, M. D.
dc.contributor.authorFaria, M. J.
dc.date.accessioned2022-08-31T09:36:53Z
dc.date.available2022-08-31T09:36:53Z
dc.date.issued2009
dc.description.abstractChanges in the pattern of steady-state modes of current transfer to thermionic cathodes induced by variations of the cathode geometry and temperature of the cooling fluid are studied numerically. For some combinations of control parameters, only one stable mode in a wide current range exists, which combines features of spot and diffuse modes. This mode, when attached to an elongated protrusion on the cathode surface, may be identified with the so-called super spot mode observed in experiments on low-current arcs. There is also reasonable agreement between the modelling and the experiment on cathodes of high-current arcs operating in the diffuse mode. The conclusions on existence under certain conditions of only one stable mode in a wide current range and of a minimum of the dependence of the temperature of the hottest point of the cathode on the arc current, manifested by this mode, may have industrial importance and admit a straightforward experimental verification.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBenilov, M. S., Cunha, M. D., & Faria, M. J. (2009). Simulating different modes of current transfer to thermionic cathodes in a wide range of conditions. Journal of Physics D: Applied Physics, 42(14), 145205. DOI: 10.1088/0022-3727/42/14/145205pt_PT
dc.identifier.doi10.1088/0022-3727/42/14/145205pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/4531
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherIOP Publishingpt_PT
dc.relationCathode spots in high-pressure DC gas discharges: self-organization phenomena
dc.relationESTUDO DA ESTABILIDADE DE TRANSFERÊNCIA DE CORRENTE AOS ELÉCTRODOS NAS DESCARGAS DE GÁS
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectThermionic cathodespt_PT
dc.subjectCurrent transferpt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleSimulating different modes of current transfer to thermionic cathodes in a wide range of conditionspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCathode spots in high-pressure DC gas discharges: self-organization phenomena
oaire.awardTitleESTUDO DA ESTABILIDADE DE TRANSFERÊNCIA DE CORRENTE AOS ELÉCTRODOS NAS DESCARGAS DE GÁS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FFIS%2F68609%2F2006/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/PIDDAC/SFRH%2FBD%2F35883%2F2007/PT
oaire.citation.issue14pt_PT
oaire.citation.startPage145205pt_PT
oaire.citation.titleJournal of Physics D: Applied Physicspt_PT
oaire.citation.volume42pt_PT
oaire.fundingStream3599-PPCDT
oaire.fundingStreamPIDDAC
person.familyNameBenilov
person.familyNameCunha
person.givenNameMikhail
person.givenNameMário
person.identifier.ciencia-id0F14-A79A-97C1
person.identifier.orcid0000-0001-9059-1948
person.identifier.orcid0000-0002-0397-536X
person.identifier.ridK-4443-2015
person.identifier.scopus-author-id7005138676
person.identifier.scopus-author-id7102711276
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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