FIELD: electricity.
SUBSTANCE: invention is attributed to electronic engineering and can be used in emission electronics, technology of surface treatment by cathode beams and electron microscopy. Cathode core is made as micropoint of high-melting atomising-resistant material and is sheeted with material having higher conductivity and lower resistance to atomising by residual gas ions than the core.
EFFECT: cathode assembly design simplification, increase in current density and durability.
2 dwg, 1 ex
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