Abstract
The design of the device and procedure of measuring the effective secondary emission coefficient γeff in glow discharges with a large-area cathode are described. The values of γeff and the density of the ion current on the cathode in the self-sustained and nonself-sustained (under the additional external injection of electrons) discharge burning modes are determined. It is shown that for the self-sustained burning mode of the basic discharge with a current of 30 A, the value γeff ≈ 0.15, being in good agreement with both the theoretically calculated and known reference data. When the basic discharge occurs in the nonself-sustained mode, γeff = 0.08–0.12, depending on the discharge burning voltage, and the ion current density on the cathode surface is equal to 0.8–1.1 mA/cm2, being ≈10% lower than the value characteristic of the self-sustained discharge mode.
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Original Russian Text © I.V. Lopatin, S.S. Kovalskiy, N.N. Koval, Yu.H. Akhmadeev, 2015, published in Pribory i Tekhnika Eksperimenta, 2015, No. 2, pp. 84–88.
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Lopatin, I.V., Kovalskiy, S.S., Koval, N.N. et al. A device and procedure for measurements of the effective secondary emission coefficient. Instrum Exp Tech 58, 247–251 (2015). https://doi.org/10.1134/S0020441215020104
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DOI: https://doi.org/10.1134/S0020441215020104