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Model of non-equilibrium near-cathode plasma layers for simulation of ignition of high-pressure arcs on cold refractory cathodes

2024-07-15Journal article Open access
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datacite.subject.fosCiências Naturais::Ciências Físicas
datacite.subject.fosEngenharia e Tecnologia::Engenharia dos Materiais
dc.contributor.authorSantos, D. F. N.
dc.contributor.authorAlmeida, N. A.
dc.contributor.authorBenilova, L. G.
dc.contributor.authorBenilov, M
dc.contributor.authorSantos, Diego
dc.contributor.authorBenilov, Mikhail
dc.date.accessioned2025-05-08T14:32:14Z
dc.date.available2025-05-08T14:32:14Z
dc.date.issued2024-07-15
dc.description.abstract<jats:title>Abstract</jats:title> <jats:p>The introduction of secondary ion-electron emission into an approximate model of non-equilibrium plasma layers on hot (thermionic) cathodes of high-pressure arc discharges allows extending the model to low cathode surface temperatures. Analysis of evaluation results shows that the extended model describes glow-like discharges on cold cathodes and thermionic arc discharges on hot cathodes, as it should. In the course of glow-to-arc transitions on cold cathodes, a transient regime occurs where a hot arc spot has just formed and a significant fraction of the current still flows to the cold surface outside the spot, so that the near-cathode voltage continues to be high. The power input in the near-cathode layer is very high in this regime, and so is the electron temperature in the near-cathode region. The mean free path for collisions between the atoms and the ions in these conditions exceeds the thickness of the layer where the ion current to the cathode is generated. A new method for evaluation of the ion current under such conditions is implemented. The developed model is applicable for cathode surface temperatures below the boiling point of the cathode material and may be used for multidimensional simulations of ignition of high-current arcs on refractory cathodes.</jats:p>eng
dc.identifier.citationSantos, D. F. N., Almeida, N. A., Benilova, L. G., & Benilov, M. S. (2024). Model of non-equilibrium near-cathode plasma layers for simulation of ignition of high-pressure arcs on cold refractory cathodes. Journal of Physics D: Applied Physics, 57(40), 405202.
dc.identifier.doi10.1088/1361-6463/ad5f3c
dc.identifier.issn0022-3727
dc.identifier.issn1361-6463
dc.identifier.urihttp://hdl.handle.net/10400.13/7264
dc.language.isoeng
dc.peerreviewedyes
dc.publisherIOP Publishing
dc.relationUIDB/50010/2020
dc.relationUIDP/50010/2020
dc.relationLA/P/0061/2020
dc.relation.ispartofJournal of Physics D: Applied Physics
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectArc discharges
dc.subjectArc electrodes
dc.subjectNon-equilibrium arc plasmas
dc.subjectArc modeling
dc.subject.
dc.subjectEscola Superior de Tecnologias e Gestão
dc.subjectFaculdade de Ciências Exatas e da Engenharia
dc.titleModel of non-equilibrium near-cathode plasma layers for simulation of ignition of high-pressure arcs on cold refractory cathodes
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue40
oaire.citation.titleJournal of Physics D: Applied Physics
oaire.citation.volume57
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameSantos
person.familyNameBenilov
person.givenNameDiego
person.givenNameMikhail
person.identifier.ciencia-idC81A-66AF-B0E2
person.identifier.ciencia-id0F14-A79A-97C1
person.identifier.orcid0000-0002-2377-766X
person.identifier.orcid0000-0001-9059-1948
person.identifier.ridG-1683-2019
person.identifier.ridK-4443-2015
person.identifier.scopus-author-id57192359233
person.identifier.scopus-author-id7005138676
relation.isAuthorOfPublicationba38d863-a13a-4729-b1d5-b6fe2a79d074
relation.isAuthorOfPublication5ccf95a3-53d5-446c-857c-55d64b887175
relation.isAuthorOfPublication.latestForDiscoveryba38d863-a13a-4729-b1d5-b6fe2a79d074

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