Emission and working characteristics of various types of field-emission cathodes (Spindt cathode, cathodes made of the SU-2000 glassy carbon, and cathodes based on carbon nanotubes) are reviewed. Advantages and disadvantages of the cathodes are analyzed and applications in vacuum tubes (in particular, O-type microwave devices) are considered.
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В. И. Шестеркин (2020) studied this question.
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