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

Benilov, M. S.; Cunha, M. D.

Publication

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

2002Journal article

dc.contributor.author	Benilov, M. S.
dc.contributor.author	Cunha, M. D.
dc.date.accessioned	2022-11-21T10:03:16Z
dc.date.available	2022-11-21T10:03:16Z
dc.date.issued	2002
dc.description.abstract	A model of the near-cathode plasma layer in a plasma under a pressure of the order of one or several bars is reconsidered on the basis of recent theoretical results. Physics of the near-cathode layer is analysed in the range of near-cathode voltage drops of up to 50 V, in accord to recent experimental results which have shown that the near-cathode voltage drop in high-pressure arc discharges may be that high. It is found that a non-monotony of the dependence of the energy flux density on the surface temperature at fixed values of the near-cathode voltage drop is caused by one of the three mechanisms: overcoming of the increase of combined ion and plasma electron heating by the increase of thermionic cooling as the plasma approaches full ionization; non-monotony of the dependence of the ion current on the electron temperature which is caused by the deviation of the ion current from the diffusion value; rapid increase of the plasma electron heating which is subsequently overcome by thermionic cooling. A closed description of the plasma–cathode interaction is obtained by numerically solving the nonlinear boundary-value problem for the temperature distribution inside the cathode body. Results of numerical modelling of the diffuse discharge under conditions of a model arc lamp are given and a good agreement with the experimental data is shown.	pt_PT
dc.description.version	info:eu-repo/semantics/publishedVersion	pt_PT
dc.identifier.citation	Benilov, M. S., & Cunha, M. D. (2002). Heating of refractory cathodes by high-pressure arc plasmas: I. Journal of Physics D: Applied Physics, 35(14), 1736.	pt_PT
dc.identifier.doi	10.1088/0022-3727/35/14/314	pt_PT
dc.identifier.uri	http://hdl.handle.net/10400.13/4789
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: I	pt_PT
dc.type	journal article
dspace.entity.type	Publication
oaire.citation.endPage	1750	pt_PT
oaire.citation.issue	14	pt_PT
oaire.citation.startPage	1736	pt_PT
oaire.citation.title	Journal of Physics D: Applied Physics	pt_PT
oaire.citation.volume	35	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
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