Suspended magnetic focusing device for sheet beam klystrons

Abstract

The invention provides a suspended magnetic focusing device for sheet beam klystrons. The device comprises first and second brackets, first and second wide magnetic steel plates, first and second narrow magnetic steel plates, first and second pull rods, first and second fixing nuts, and first and second tail end fixing assemblies, wherein the first and second brackets are respectively provided with a connecting part, the first wide magnetic steel plate and the first narrow magnetic steel plate are fixed on the first bracket, the second wide magnetic steel plate and the second narrow magnetic steel plate are fixed on the second bracket, the first pull rod passes through the connecting part of the first bracket and is fixed by the first fixing nut and the first tail end fixing assembly, and the second pull rod passes through the connecting part of the second bracket and is fixed by the second fixing nut and the second tail end fixing assembly. The suspended magnetic focusing device for sheet beam klystrons, provided by the invention, is capable of adjusting magnetic configuration space distribution in a certain range and convenient to assemble and disassemble.

Description

technical field [0001] The invention relates to the field of microwave electric vacuum devices, in particular to the technical field of magnetic focusing for strip-shaped injection klystrons. Background technique [0002] Driven by the development of modern science and technology and industrial applications, relevant scientific research institutions in the world are actively exploring new electric vacuum devices that can generate high-power microwaves. Striped injection klystrons are one of the feasible solutions that have attracted people's attention. . With the traditional cylindrical solid electron beam, the operating voltage and current of the device will increase continuously with the increase of output power, which will cause serious high-frequency sparking and stability problems, and by introducing a strip-shaped electron beam, it will still High power operation of the device can be achieved using a high conductance flat beam. [0003] Since the cross-section of the...

AI Technical Summary

Problems solved by technology

For the electron optical system in the klystron, although the software simulation shows that the beam passing rate can reach 98%, according to its published test results and analysis, the incident state of the electron beam is different from the ideal state due to the assembly error of the electron gun. The situation does not match, so the measured beam current passing rate is only 63% under the preset working voltage

In the structure designed by CPI Corporation of the United States, the magnetic focusing system does not have the ability to adjust and cannot adapt to the actual electron injection that deviates from the ideal state. This is one of the important reasons why the performance of the experimental sample tube does not meet the predetermined requirements.

[0005] The main technical defect: In the X-band strip-shaped injection klystron developed by CPI Company of the United States, its periodic permanent magnet array is directly installed on the outer surface of the drift channel, and it does not have the ability to adjust horizontally and vertically along the drift channel, which makes The focusing system has strict requirements on the quality of the matching ribbon beam produced by the electron gun. If the beam state deviates from the design value, the magnetic focusing system cannot adapt to it by adjusting the spatial distribution of the magnetic configuration, which increases Difficulty and experiment cost in the development of strip-shaped injection klystron

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