Magnetic steel sheet, magnetic focusing system and traveling wave tube comprising magnetic focusing system

Abstract

The embodiment of the invention discloses a magnetic steel sheet, a magnetic focusing system and a traveling wave tube comprising the magnetic focusing system. The magnetic steel sheet comprises a first body with a first central through hole, and a U-shaped notch formed in the first body and penetrating through the upper side surface and the lower side surface of the magnetic steel sheet, whereinthe hole center of the first central through hole extends in the radial direction of the first central through hole to penetrate through the surface of the outer side wall of the first body to form the U-shaped notch, the magnetic steel sheet further comprises a first compensation notch, the first compensation notch and the U-shaped notch are arranged in the same center line, the opening directionof the first compensation notch is opposite to the opening direction of the U-shaped notch, the first compensation notch penetrates through the upper side surface and the lower side surface of the magnetic steel sheet, and the length of the first compensation notch is smaller than the radius length of the first body of the magnetic steel sheet. According to the invention, the magnetic steel sheetis simple to process and convenient to install, the asymmetry of the magnetic steel sheet is reduced, the eccentric distance of a magnetic induction line is shortened, and the passing rate of electron beams is improved.

Description

technical field [0001] The present invention relates to the technical field of microwave vacuum electronics, and more specifically, the present application relates to a magnetic steel sheet, a magnetic focusing system and a traveling wave tube including the same. Background technique [0002] Traveling wave tube is a kind of vacuum amplification device. As the final power amplifier of radar, it has already put forward clear application requirements in many weapons and equipment. The working environment of traveling wave tubes covers a wide range of fields, and the working conditions and environment of traveling wave tubes are very harsh. At the same time, traveling wave tubes are required to have a high working ratio. The traveling wave tubes in the prior art can only be cooled by conduction, so a very high requirement is placed on the electron injection rate of the traveling wave tube. Due to its high operating frequency band and small structural size, traveling wave tube ...

AI Technical Summary

Problems solved by technology

However, in the prior art such as figure 2 The magnetic steel sheet 20 shown forms a "U"-shaped structure 21 in the Y direction, which will cause the center of gravity of the magnetic field lines in the traveling wave tube to shift in the Y direction, thereby deviating from the channel center of the electron beam, thereby affecting the flow of the traveling wave tube. Tube flow rate

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