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Revisiting theoretical description of the retrograde motion of cathode spots of vacuum arcs

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dc.contributor.authorBenilov, Mikhail S.
dc.contributor.authorKaufmann, Helena T. C.
dc.contributor.authorHartmann, Werner
dc.contributor.authorBenilova, Larissa G.
dc.date.accessioned2022-09-06T11:07:39Z
dc.date.available2022-09-06T11:07:39Z
dc.date.issued2019
dc.description.abstractA fresh attempt to develop a self-consistent descrip tion of the retrograde motion of cathode spots on volatile cathodes is undertaken. Three potential mechanisms of effect of transversal magnetic field on the distribution of parameters in the spot are studied: the effect of magnetic field on hydrodynamics processes in the spot, in particular, on the formation of liquid-metal jet and the droplet detachment, and the effect of transversal magnetic field over the motion of ions and emitted electrons in the near-cathode space-charge sheath. It is found that for typical conditions of cathode spots in vacuum arcs the effect of magnetic field over the formation of liquid-metal jet and the droplet detachment is negligible; the motion of the ions in the near-cathode space-charge sheath is not disturbed; and the motion of the emitted electrons is disturbed only marginally. Thus, the above-mentioned potential mechanisms are hardly relevant and the first-principle understanding is still missing. A phenomenological description of the retrograde motion is developed as an alternative. The description employs general considerations without relying on specific assumptions and the (only) unknown parameter can be determined from comparison with the experiment.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBenilov, M. S., Kaufmann, H. T., Hartmann, W., & Benilova, L. G. (2019). Revisiting theoretical description of the retrograde motion of cathode spots of vacuum arcs. IEEE Transactions on Plasma Science, 47(8), 3434-3441. DOI: 10.1109/TPS.2019.2904866pt_PT
dc.identifier.doi10.1109/TPS.2019.2904866pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/4570
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherInstitute of Electrical and Electronics Engineerspt_PT
dc.relationInstitute for Plasmas and Nuclear Fusion
dc.relation.publisherversionhttps://ieeexplore.ieee.org/abstract/document/8723107pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectArc dischargespt_PT
dc.subjectCathodespt_PT
dc.subjectPlasma sheathspt_PT
dc.subjectVacuum arcspt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleRevisiting theoretical description of the retrograde motion of cathode spots of vacuum arcspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleInstitute for Plasmas and Nuclear Fusion
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FFIS%2F50010%2F2013/PT
oaire.citation.endPage3441pt_PT
oaire.citation.issue8pt_PT
oaire.citation.startPage3434pt_PT
oaire.citation.titleIEEE Transactions on Plasma Sciencept_PT
oaire.citation.volume47pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameBenilov
person.familyNameda Costa Kaufmann
person.givenNameMikhail
person.givenNameHelena Teresa
person.identifierF-9313-2019
person.identifier.ciencia-id0F14-A79A-97C1
person.identifier.ciencia-idC81B-A663-3AA1
person.identifier.orcid0000-0001-9059-1948
person.identifier.orcid0000-0001-6740-2467
person.identifier.ridK-4443-2015
person.identifier.scopus-author-id7005138676
person.identifier.scopus-author-id57194384877
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication5ccf95a3-53d5-446c-857c-55d64b887175
relation.isAuthorOfPublicationc925c328-4ea8-4602-895e-a409ad12f24c
relation.isAuthorOfPublication.latestForDiscovery5ccf95a3-53d5-446c-857c-55d64b887175
relation.isProjectOfPublication773f8550-0778-4bd3-b859-600f4fca9629
relation.isProjectOfPublication.latestForDiscovery773f8550-0778-4bd3-b859-600f4fca9629

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