Structure of high-power strip beam electron gun with rectangular section

Abstract

The invention discloses a structure of a high-power strip beam electron gun with a rectangular section and relates to a vacuum electronic device technology. A cathode is a rectangular cylinder structure; a focusing electrode is a square frame-shaped structure spliced by two focusing planes with a certain inclination angles in the transverse direction; an anode is a structure with a hollow passage with a certain taper; an anode head is fixedly arranged at the center of a bottom surface inside an anode supporting barrel; the periphery of the rectangular cylinder cathode is matched with the hollow square frame at the bottom of the focusing electrode; the cathode and the focusing electrode are positioned in the anode supporting barrel; two symmetrical planes of the focusing electrode are parallel to two symmetrical planes of the anode and the central axes of the focusing electrode nd the anode are coincident; and a certain distance is formed between the focusing electrode and the anode. The electron gun disclosed by the invention has a direct current power of about 15MW, specification of 50mm*4mm of an electron beam section and compression ratio of 5:1 in the narrow edge direction and has excellent fluidity of an beam inner layer at the position of a beam waist. The generation problem of a strip electron beam is solved. The high-power strip beam electron gun with the rectangular section can be used in a high-power strip beam device and can be matched with a focusing system to realize long-distance stable transmission.

Description

technical field [0001] The invention relates to the technical field of microwave electric vacuum devices, and relates to the structure of a high-power electron gun capable of producing strip-shaped electron beams with rectangular cross-sections. Background technique [0002] With the development of science and technology, in the application fields of high-power radar, directed-energy microwave weapons and high-energy accelerators, there is an increasingly urgent demand for new devices capable of outputting high-power microwaves. Wave tubes are very promising candidates. In the traditional single-shot and multi-shot klystrons using circular jets, the space charge force is always an unfavorable factor restricting the further increase of output power, and this problem is more serious in the high frequency band. Through simple calculation, it can be known that under the same condition of total current, the band-shaped electron beam has a larger cross-sectional area, so the curr...

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Problems solved by technology

Therefore, under the requirement of ensuring a certain beam power, it is very difficult to design a

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