Abstract
Experimental data on particle generation in the corona-discharge zone are obtained. The size distribution of these particles is measured as a function of the discharge parameters. The particle-size spectra are shown to slightly depend on the polarity of the corona point and are only determined by the potential difference and current strength. Various materials such as iron, copper, silver, molybdenum, tungsten, and graphite are the objects studied. The measurements are carried out under normal conditions in various gaseous atmospheres such as air, nitrogen, and argon. A theoretical model for the interaction of corona-discharge plasma with a metal surface is developed. The extraction of atoms from lattice sites supposedly occurs as a result of collective excitations of the electron gas in the metals. This theoretical model is based on the resonant excitation of a plasmon in the surface layer of a metal upon the inelastic scattering of charged particles of a corona discharge on the electrons of a metal sample. It is shown using the electrostatic-imaging method that the Coulomb interaction of a negative-charge-density wave on the surface with a surface ion of the crystal lattice is capable of extraction the ion from the metal. The interaction cross section of this process is estimated. These results are in qualitative agreement with the experimental data, which confirms the validity of the chosen interaction model.
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This work was supported by the Russian Foundation for Basic Research (project no. 19-05-50007, Mikromir).
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Translated by E. Boltukhina
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Zagaynov, V.A., Maksimenko, V.V., Kalashnikov, N.P. et al. Particle Generation in the Corona-Discharge Zone. J. Surf. Investig. 16, 462–468 (2022). https://doi.org/10.1134/S1027451022040188
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DOI: https://doi.org/10.1134/S1027451022040188