PULSE MAGNETRON WITH NON-INCANDESCENT START WITH A THREE-MODULE ACTIVE BODY IN THE CATHODE UNIT Russian patent published in 2022 - IPC H01J25/50 H01J23/04 H01J1/304 

FIELD: electronic engineering.

SUBSTANCE: invention relates to electronic engineering and is intended for use in M-type microwave devices, in particular in pulsed magnetrons with non-incandescent start of the centimeter, millimeter and submillimeter wavelength ranges in a wide range of generated pulsed power. The magnetron contains a cathode assembly with a three-module active body. The first module is a secondary electron emitter, made in the form of a cylindrical sleeve 0.5-2.5 mm long, made of agglomerated pressed nickel oxide material; iridium-lanthanum, iridium-cerium and a number of other emission-active cathode materials, characterized by high mechanical strength, stable secondary emission properties, resistant to ion and electron bombardment. The second module is an autoelectronic emitter made of tantalum foil 4-10 mcm thick, on the working surface of which, as a result of special activation of the node in an electric field during pumping and training of the device in a dynamic mode, palladium whiskers coated with emission-active compounds are formed, reducing the work function of the field emitter material. The third module is the field emitter activator, made in the form of a washer 0.1-0.3 mm thick from palladium or a palladium-containing material, for example, from a plate of an alloy of palladium with barium (PdB-2) or made by powder technology from a mixture of powders of palladium and phase Pd5Ba. Two activators, symmetrically placed on both sides of the field emitter, together with the field emitter form a field emission unit.

EFFECT: increasing the stability, reliability and service life of magnetrons.

7 cl, 5 dwg