An Electron Optical System Applicable to Stripped Traveling Wave Tube

Abstract

The invention provides an electron optical system suitable for a strip electron injection traveling wave tube, which belongs to the technical field of vacuum electronics. The electron optical system includes a strip-shaped electron injection gun, a uniform magnetic field focusing system and a collector. A new type of elliptical focusing pole structure designed by the present invention is used to form the strip-shaped electron beam. By adjusting the long axis and short axis of the elliptical focusing pole The size can easily change the compression ratio of the ribbon-shaped electron beam; in addition, the present invention proposes an assembly scheme of an electron optical system in which a permanent magnet produces a uniformly focused magnetic field. The permanent magnet and the anode tube have a large gap, so the electron The optical system has the advantages of simple structure, large heat dissipation space, uniform magnetic field focusing system without external power supply and longitudinal adjustment.

Description

technical field [0001] The invention belongs to the technical field of vacuum electronics, and in particular relates to an electron optical system for a traveling wave tube working in the terahertz frequency band. Background technique [0002] Vacuum electronic devices are well known for their high power, high efficiency, high gain, and wide operating bandwidth, and are widely used in defense weapons and equipment, large scientific devices, and medical imaging equipment. So far, vacuum electronic devices such as traveling wave tubes, klystrons, magnetrons, and gyrotrons have been successfully developed. Among them, traveling wave tubes are one of the vacuum electronic devices with the most demand and the most extensive research, and have important application prospects in the fields of electronic countermeasures, radar, satellite communications, deep space exploration, and biomedical imaging. According to the different types of electron beams, traveling wave tubes can be ma...

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Problems solved by technology

[0006] Aiming at the defect that the strip electron beam in the background technology is difficult to transmit stably in the strip beam traveling wave tube, the purpose of the present invention is to provide an electron optical system suitable for the strip beam traveling wave tube, which is based on The permanent magnet produces a uniformly focused magnetic field, and the newly designed elliptical focus pole structure enables the stable transmission of the band-shaped electron beam with high current density

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