{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,9]],"date-time":"2026-04-09T22:33:19Z","timestamp":1775773999457,"version":"3.50.1"},"reference-count":54,"publisher":"IOP Publishing","issue":"19","license":[{"start":{"date-parts":[[2021,2,25]],"date-time":"2021-02-25T00:00:00Z","timestamp":1614211200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/publishingsupport.iopscience.iop.org\/iop-standard\/v1"},{"start":{"date-parts":[[2021,2,25]],"date-time":"2021-02-25T00:00:00Z","timestamp":1614211200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["J. Phys. D: Appl. Phys."],"published-print":{"date-parts":[[2021,5,13]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Since experiments cannot clarify the mechanism of current transfer to non-thermionic arc cathodes, this can only be done by means of numerical modelling based on first principles and not relying on\n                    <jats:italic>a priori<\/jats:italic>\n                    assumptions. In this work, the first quarter-period after the ignition of an AC arc on cold electrodes in atmospheric-pressure argon is investigated by means of unified one-dimensional modelling, where the conservation and transport equations for all plasma species, the electron and heavy-particle energy equations, and the Poisson equation are solved in the whole interelectrode gap up to the electrode surfaces. Results are compared with those for DC discharges and analysed with the aim to clarify the role of different mechanisms of current transfer to non-thermionic arc cathodes. It is found that the glow-to-arc transition in the AC case occurs in a way substantially different from the quasi-stationary glow-to-arc transition. The dominant mechanisms of current transfer to the cathode during the AC arc ignition on cold electrodes are, subsequently, the displacement current, the ion current, and thermionic emission current. No indications of explosive emission are found. Electron emission from the impact of excited atoms can hardly be a dominant mechanism either. The introduction of the so-called field enhancement factor, which is used for description of field electron emission from cold cathodes in a vacuum, leads to computed cathode surface temperature values that are appreciably lower than the melting temperature of tungsten even in the quasi-stationary case. This means that pure tungsten cathodes of atmospheric-pressure argon arcs can operate without melting, in contradiction with experiments.\n                  <\/jats:p>","DOI":"10.1088\/1361-6463\/abdf97","type":"journal-article","created":{"date-parts":[[2021,1,25]],"date-time":"2021-01-25T17:36:55Z","timestamp":1611596215000},"page":"195202","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":20,"title":["Numerical investigation of AC arc ignition on cold electrodes in atmospheric-pressure argon"],"prefix":"10.1088","volume":"54","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2377-766X","authenticated-orcid":false,"given":"D F N","family":"Santos","sequence":"first","affiliation":[]},{"given":"M","family":"Lisnyak","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6499-3609","authenticated-orcid":false,"given":"N A","family":"Almeida","sequence":"additional","affiliation":[]},{"given":"L G","family":"Benilova","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9059-1948","authenticated-orcid":false,"given":"M S","family":"Benilov","sequence":"additional","affiliation":[]}],"member":"266","published-online":{"date-parts":[[2021,2,25]]},"reference":[{"key":"dabdf97bib1","doi-asserted-by":"publisher","first-page":"177","DOI":"10.1007\/s40194-017-0513-2","type":"journal-article","volume":"62","author":"Choquet","year":"2018","journal-title":"Weld. 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All rights, including for text and data mining, AI training, and similar technologies, are reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2020-09-10","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2021-01-25","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2021-02-25","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}