Heating of refractory cathodes by high-pressure arc plasmas: II

Benilov, M. S.; Cunha, M D

Publication

Heating of refractory cathodes by high-pressure arc plasmas: II

2003Journal article

dc.contributor.author	Benilov, M. S.
dc.contributor.author	Cunha, M D
dc.date.accessioned	2022-11-21T10:14:32Z
dc.date.available	2022-11-21T10:14:32Z
dc.date.issued	2003
dc.description.abstract	Solitary spots on infinite planar cathodes and diffuse and axially symmetric spot modes on finite cathodes of high-pressure arc discharges are studied in a wide range of arc currents. General features are analysed and extensive numerical results on planar and cylindrical tungsten cathodes of atmospheric-pressure argon arcs are given for currents of up to 100 kA. It is shown, in particular, that the temperature of cathode surface inside a solitary spot varies relatively weakly and may be estimated, to the accuracy of about 200–300 K, without actually solving the thermal conduction equation in the cathode body. Asymptotic behaviour of solutions for finite cathodes in the limiting case of high currents is found and confirmed by numerical results. A general pattern of current–voltage characteristics of various modes on finite cathodes suggested previously on the basis of bifurcation analysis is confirmed. A transition from the spot modes on a finite cathode in the limit of large cathode dimensions to the solitary spot mode on an infinite planar cathode is studied. It is found that the solitary spot mode represents a limiting form of the high-voltage spot mode on a finite cathode. A question of distinguishing between diffuse and spot modes on finite cathodes is considered.	pt_PT
dc.description.version	info:eu-repo/semantics/publishedVersion	pt_PT
dc.identifier.citation	Benilov, M. S., & Cunha, M. D. (2003). Heating of refractory cathodes by high-pressure arc plasmas: II. Journal of Physics D: Applied Physics, 36(6), 603-614.	pt_PT
dc.identifier.doi	10.1088/0022-3727/36/6/301	pt_PT
dc.identifier.uri	http://hdl.handle.net/10400.13/4790
dc.language.iso	eng	pt_PT
dc.peerreviewed	yes	pt_PT
dc.publisher	IOP Publishing	pt_PT
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/	pt_PT
dc.subject	Heating of refractory cathodes	pt_PT
dc.subject	Refractory cathodes	pt_PT
dc.subject	High-pressure arc plasmas	pt_PT
dc.subject	Arc plasmas	pt_PT
dc.subject	.	pt_PT
dc.subject	Faculdade de Ciências Exatas e da Engenharia	pt_PT
dc.title	Heating of refractory cathodes by high-pressure arc plasmas: II	pt_PT
dc.type	journal article
dspace.entity.type	Publication
oaire.citation.endPage	614	pt_PT
oaire.citation.issue	6	pt_PT
oaire.citation.startPage	603	pt_PT
oaire.citation.title	Journal of Physics D: Applied Physics	pt_PT
oaire.citation.volume	36	pt_PT
person.familyName	Benilov
person.familyName	Cunha
person.givenName	Mikhail
person.givenName	Mário
person.identifier.ciencia-id	0F14-A79A-97C1
person.identifier.orcid	0000-0001-9059-1948
person.identifier.orcid	0000-0002-0397-536X
person.identifier.rid	K-4443-2015
person.identifier.scopus-author-id	7005138676
person.identifier.scopus-author-id	7102711276
rcaap.rights	openAccess	pt_PT
rcaap.type	article	pt_PT
relation.isAuthorOfPublication	5ccf95a3-53d5-446c-857c-55d64b887175
relation.isAuthorOfPublication	8509472b-5d78-47db-bfa0-51625a4e9218
relation.isAuthorOfPublication.latestForDiscovery	5ccf95a3-53d5-446c-857c-55d64b887175