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Numerical simulation of the initial stage of unipolar arcing in fusion-relevant conditions

2019Journal article Open access
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dc.contributor.authorKaufmann, H. T. C.
dc.contributor.authorSilva, C.
dc.contributor.authorBenilov, M. S.
dc.date.accessioned2022-09-06T13:08:00Z
dc.date.available2022-09-06T13:08:00Z
dc.date.issued2019
dc.description.abstractA model for the initial phase of unipolar arcing has been developed with account of an external energy source which triggers the arcing, the vaporization of the atoms from the heated surface, the ions and electrons produced by ionization of the vapor, the electron emission from the metal surface, and melt motion and surface deformation. Current transfer outside the arc attachment is taken into account and the potential difference between the plasma and the metal surface (the plate) is evaluated from the condition that the net current transferred to the plate is zero at each moment. The model is used for simulation of the interaction of an external energy load (laser beam) with a tungsten plate immersed in a helium background plasma. The results revealed the formation of a crater, but no jet formation or droplet detachment. If the plate is large (R = 100 mm), the peak temperature attained is 5200 K, and the plate potential remains below the plasma potential. If the plate is small (R = 10 mm), a peak temperature of 7500 K is reached, the potential of the plate surpasses the plasma potential, circulation of the melt at the pool periphery occurs, and the erosion (which is mainly due to the vaporization of the metal atoms in the spot) reaches the value of 37 μg.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationKaufmann, H. T. C., Silva, C., & Benilov, M. S. (2019). Numerical simulation of the initial stage of unipolar arcing in fusion-relevant conditions. Plasma Physics and Controlled Fusion, 61(9), 095001. https://doi.org/10.1088/1361-6587/ab2facpt_PT
dc.identifier.doi10.1088/1361-6587/ab2facpt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/4571
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherIOP Publishingpt_PT
dc.relationInstitute for Plasmas and Nuclear Fusion
dc.relation.publisherversionhttps://iopscience.iop.org/article/10.1088/1361-6587/ab2fac/metapt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectUnipolar arcspt_PT
dc.subjectPlasma-electrode interactionpt_PT
dc.subjectArc dischargespt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleNumerical simulation of the initial stage of unipolar arcing in fusion-relevant conditionspt_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%2F2019/PT
oaire.citation.issue9pt_PT
oaire.citation.startPage095001pt_PT
oaire.citation.titlePlasma Physics and Controlled Fusionpt_PT
oaire.citation.volume61pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameda Costa Kaufmann
person.familyNameSousa Luís
person.familyNameBenilov
person.givenNameHelena Teresa
person.givenNameCatarina Grace
person.givenNameMikhail
person.identifierF-9313-2019
person.identifierC-1300-2019
person.identifier.ciencia-idC81B-A663-3AA1
person.identifier.ciencia-id9813-3B88-BA8D
person.identifier.ciencia-id0F14-A79A-97C1
person.identifier.orcid0000-0001-6740-2467
person.identifier.orcid0000-0002-3018-3165
person.identifier.orcid0000-0001-9059-1948
person.identifier.ridK-4443-2015
person.identifier.scopus-author-id57194384877
person.identifier.scopus-author-id57194492726
person.identifier.scopus-author-id7005138676
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationc925c328-4ea8-4602-895e-a409ad12f24c
relation.isAuthorOfPublication2853e6b6-0fb5-454c-aedb-05528b76c484
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relation.isAuthorOfPublication.latestForDiscovery2853e6b6-0fb5-454c-aedb-05528b76c484
relation.isProjectOfPublication1b3181b8-31b9-41ee-97dd-da48b59b5f9c
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