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EQUATION FOR THERMIONIC EMISSION IN A

I. N. Ostretsov, V. A. Petrosov, A. A. Porotnikov, B. B. Rodnevich

Abstract

The equation for thermionic emission from hot cathodes in the presence of a low-temperature plasma is discussed. The distribution function is obtained for the magnitude of the electric field intensity at the surface of the cathode, taking account of the effect of the individual fields of the various ions moving in the near-cathode layer. The thermionic flux density due to fluctuations of the field is found to be significantly higher than that calculated by Richardson's formula with Schottky's correction.

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Available abstract

Key concepts: Thermionic emission, Cathode, Schottky effect, Electric field, Work function, Flux (metallurgy), Hot cathode, Schottky diode