Dual-anode magnetic control electronic gun with adjustable cathode

Abstract

The invention belongs to a dual-anode magnetic control electronic gun for being matched with a vacuum gyrotron. The dual-anode magnetic control electronic gun comprises an electronic gun shell, a base, an electric heating wire assembly, a supporting drum, an adjusting mechanism assembly, an electronic gun cathode, a fixed annular plate, a first anode, a fixed ring and a second anode, wherein the electric heating wire assembly comprises an electric heating wire, an electric heating wire bushing and insulation stuffing, the electric heating wire busing is provided with an annular scale section, a threaded section and a guide plane, the supporting drum is provided with a sliding-type positioning sleeve and fixes the electric heating wire assembly into the electronic gun shell, the adjusting mechanism assembly with an adjusting nut is arranged between the electric heating wire bushing and the supporting drum; and a distance between the cathode and anodes is adjusted according to a working condition, a transverse-longitudinal speed ratio of an obtained electron beam is greater than 1.0, and the dispersion of the longitudinal speed is smaller than 1.5 percent. Due to adopting the dual-anode magnetic control electronic gun with adjustable cathode, the influences of a traditional electronic gun caused by assembling error, overheating deformation or large current and voltage variation can be effectively overcome. The dual-anode magnetic control electronic gun has characteristics of adaptability to the working current and voltage of greater range, low dispersion of the speed, excellent performance of electron beams, capability of improving the interaction power and efficiency of the subsequent gyrotron electron beams and the like.

Description

technical field [0001] The invention belongs to the double-anode magnetron electron gun in the technical field of high-power microwave, millimeter wave and submillimeter wave, in particular to a cathode-adjustable double-anode magnetron electron gun matched with a vacuum gyrotron. Background technique [0002] The gyrotron was made by the scientists of the former Soviet Union in the 1960s by using the mechanism of electron cyclotron resonance stimulated radiation. The excellent performance shown has greatly promoted the application of millimeter wave and submillimeter wave in the fields of radar and guidance system, electronic warfare, millimeter wave communication, high power microwave system, controlled thermonuclear fusion, etc. It has attracted the attention of countries all over the world, and has successively carried out theoretical and applied research on gyrotrons. The gyrotron is a device that converts the direct current energy carried by electrons into microwave e...

AI Technical Summary

Problems solved by technology

The patent number is 200810114538.X, and the name of the invention is "Method for Suppressing Oscillation in Double-anode Magnetron Injection Gun Area of ​​Gyrotron Amplifier", which belongs to this type of double-anode magnetron electron gun. The cathode of this type of electron gun is welded with the electron gun through its supporting cylinder Therefore, once the relative position of the cathode and anode of the electron gun deviates during the manufacturing and assembly process of the electron gun, it cannot be adjusted, and the heat caused by the uneven heating of each part during the working process Deformation or changes in the relative position of cathode and anode due to excessive changes in operating current and voltage will lead to changes in the electric field on the surface of the cathode, increase the dispersion of the initial electron velocity when the electron gun is working, and reduce the efficiency of the injection wave interaction of the gyrotron tube. happened

Therefore, this type of electron gun has defects such as large scattered velocity, which is difficult to meet the requirement that the velocity dispersion is less than 3% in use, and low efficiency of injection wave interaction in the gyrotron.

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