Abstract:
Results of spectroscopic and pyrometric studies of the near-electrode plasma-tungsten cathode system are presented. The $\mathrm{2D}$-spectra of radiation of the multiply ionized nitrogen plasma of electric-arc discharge under atmospheric pressure are obtained at different current values. The axial electron temperature in this plasma is determined depending on the distance from the cathode tip, and the temperature distribution over the current-collecting surface of the cathode is found. The high-speed visualization of the cathode-near-cathode plasma region made it possible to observe phase transitions on the cathode surface and processes of crack formation and detachment of its fragments. The power released at the cathode is analyzed including the contribution of the arc column resonance emission, and the peculiarities of phase transitions on the cathode surface are revealed. The densities of the electron emission current at the cathode are estimated theoretically and compared with the data obtained in the experiment. Possible causes of the difference between the theoretical values of the emission current density and those found experimentally are discussed.
Citation:
A. A. Belevtsev, S. V. Goryachev, E. Kh. Isakaev, V. F. Chinnov, “Experimental study of the near-electrode plasma-tungsten cathode system in high-current atmospheric-pressure nitrogen arcs”, TVT, 51:5 (2013), 652–662; High Temperature, 51:5 (2013), 583–593
\Bibitem{BelGorIsa13}
\by A.~A.~Belevtsev, S.~V.~Goryachev, E.~Kh.~Isakaev, V.~F.~Chinnov
\paper Experimental study of the near-electrode plasma-tungsten cathode system in high-current atmospheric-pressure nitrogen arcs
\jour TVT
\yr 2013
\vol 51
\issue 5
\pages 652--662
\mathnet{http://mi.mathnet.ru/tvt126}
\crossref{https://doi.org/10.7868/S0040364413050025}
\elib{https://elibrary.ru/item.asp?id=20193316}
\transl
\jour High Temperature
\yr 2013
\vol 51
\issue 5
\pages 583--593
\crossref{https://doi.org/10.1134/S0018151X13050027}
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Linking options:
https://www.mathnet.ru/eng/tvt126
https://www.mathnet.ru/eng/tvt/v51/i5/p652
This publication is cited in the following 9 articles:
Laznickova I., Jakubova I., Senk J., “Modelling of a Heavy-Current Intensively Blasted Electric Arc At Atmospheric Pressure”, Plasma Sources Sci. Technol., 30:9 (2021), 095010
M A Sargsyan, D V Tereshonok, M Kh Gadzhiev, A S Tyuftyaev, V V Shcherbakov, “The destruction of pure metal cathodes during the initiation of direct current arc”, J. Phys.: Conf. Ser., 1787:1 (2021), 012059
Sargsyan M.A., Tereshonok D.V., Gadzhiev M.Kh., Tyuftyaev A.S., “Mechanism of Mass Expulsion From the Surface of a Pure Tungsten Cathode During Dc Arc Initiation”, EPL, 131:4 (2020), 45002
Sargsyan M.A., Tereshonok D.V., Valyano G.E., Scherbakov V.V., Konovalov P.A., Gadzhiev M.Kh., “Features of the Arc Binding Region Structure on the Surface of the Thoriated Cathode in Atmospheric Pressured Argon”, Phys. Plasmas, 27:2 (2020), 023506
J. Senk, I. Laznickova, I. Jakubova, “Updated version of the simplified model of intensively blasted electric arc”, Acta Polytech., 58:4 (2018), 264–270
A. A. Belevtsev, S. V. Goryachev, E. Kh. Isakaev, V. F. Chinnov, “Lifetime of the thermoemission cathodes of nitrogen plasma generators”, High Temperature, 54:6 (2016), 789–795
M. Kh. Gadzhiev, M. A. Sargsyan, D. V. Tereshonok, A. S. Tyuftyaev, “One more study of argon arc binding to pure tungsten cathode”, EPL, 115:3 (2016), 35002
Cheng X., Li W., Hang W., Huang B., “Depth Profiling of Nanometer Thin Layers By Pulsed Micro-Discharge With Inductively Coupled Plasma Mass Spectrometry”, Spectroc. Acta Pt. B-Atom. Spectr., 111 (2015), 52–56
Gadzhiev M.Kh. Sargsyan M.A. Tereshonok D.V. Tyuftyaev A.S., “Investigation of the Argon Arc Binding To the Lanthanated Tungsten Cathode”, EPL, 111:2 (2015), 25001
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