Electron emission device based on hot electron emission cathode

Abstract

The present invention provides an electron emission device based on a hot electron emission cathode. The electron emission device comprises an electron generation unit and a heating unit, the heatingunit comprises a heating assembly, an insulating sleeve and an insulating heat insulation assembly, and the heating assembly comprises a plurality of heating metal wires. A metal pedestal is equippedwith a plurality of through holes, the metal pedestal and the insulating sleeve are in nested arrangement from inside to outside, and a gap is arranged between the metal pedestal and the insulating sleeve. The heating metal wires are located in the gap, one end of each heating metal wire is connected with the metal pedestal, and the other end penetrates the through hole to form one output end of the heating assembly. The insulating heat insulation assembly seals the gap to form the heating space, the electron generation unit comprises the hot electron emission cathode and a hot electron emission anode, the hot electron emission cathode is used to receive the heat of the insulating sleeve to generate the electrons, and the electrons are emitted under the action of an electric field formed between the hot electron emission cathode and the hot electron emission anode. On the condition of keeping the internal high vacuum, the device can provide the high-density electrons to the surroundingatmospheric environment.

Description

technical field [0001] The invention belongs to an electron generating device, in particular to an electron generating device based on a thermionic emission cathode. Background technique [0002] At present, the existing electron generating devices are mainly based on several principles such as electron beam radiation, glow discharge, corona discharge, dielectric barrier discharge, radio frequency discharge, sliding arc discharge and jet discharge. Among them, the structure of the electron beam radiation equipment is complex, the cost is high, and complex high-voltage power supply and accelerating tube equipment are required, resulting in bulky equipment and serious X-ray pollution, which requires safety protection equipment against X-rays; glow discharge is limited by low air pressure, and industrial It is difficult to apply continuous production and the cost is high; corona discharge and dielectric barrier discharge devices have higher requirements on voltage levels, and i...

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the present invention proposes an electron generating device based on a thermionic emission cathode, which is used to generate a high-density electron flow, and overcomes the existing technical problem that the structure of the electron generating device is complicated due to the complicated way of generating electrons

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