Coaxial dual-electron beam electron gun

Abstract

The invention belongs to a coaxial dual-electron beam electron gun matched with a gyrotron (an oscillator and an amplifier), which comprises an electron gun barrel body, a base, a cathode sleeve withan electric heating wire and two electron beam emitting rings, internal and external anodes and a control anode. In the coaxial dual-electron beam electron gun, the internal and external anodes and the cathode sleeve are arranged oppositely and coaxially, the internal anode and the external anode are still arranged in an overlapping (telescoping) manner, and the control anode is arranged between the internal and external anodes and a cathode head so as to regulate the current of an electron beam and the rotation speed and axial speed of the electron beam in the gyrotron. Therefore, the coaxialdual-electron beam electron gun has the characteristics that the output power can be regulated quickly, the work efficiency of the gyrotron can be regulated arbitrarily within the range of the peak efficiency of the gyrotron, the performance of the coaxial dual-electron beam electron gun and the application range of the gyrotron matched with the electron gun are effectively improved, breakdown between the internal and external anodes and the cathode sleeve and between the control anode and the cathode sleeve is prevented, the miniaturization of devices is facilitated, and the like.

Description

technical field [0001] The invention belongs to the electron gun matched with a gyrotron (oscillator, amplifier) ​​in the technical field of high-power microwave, millimeter wave and submillimeter wave, and in particular relates to a coaxial double electron beam electron gun. Background technique [0002] As a new type of high-power microwave, millimeter wave, and submillimeter wave devices, the gyrotron has developed rapidly since its inception. A series of gyrotron devices have been successfully developed, and its wave band has reached the millimeter wave and submillimeter wave bands. The power is as high as several megawatts. The average power has reached hundreds of kilowatts. In the millimeter wave and submillimeter wave bands, this is unmatched by ordinary microwave tubes, and has great application prospects in microwave, millimeter wave, submillimeter wave radar, communication and other fields; in the sintering of high-performance precision ceramics, nuclear magnetic ...

AI Technical Summary

Problems solved by technology

In this patented technology, since the inner conductor (inner anode) is located in the cathode sleeve, and the cathode sleeve is located in the outer conductor (outer anode), in order to avoid high-voltage breakdown between the inner and outer conductors (outer anode) and the cathode, the inner and outer conductors ( anode) and the minimum distance between the cathode casing is limited

Therefore, the radius of the electron beam emission ring of the cathode sleeve and the inner diameter of the outer conductor (outer anode) in this type of electron gun are limited and cannot be set arbitrarily; especially the working potential difference between the inner and outer conductors (anode) and the cathode sleeve When it is large, neither a smaller emission ring radius nor a smaller inner diameter of the outer conductor (outer anode) can be used, making it difficult to miniaturize the device in the diameter direction; especially the patented technology cannot be used when the working potential is constant The size of the electron beam current, the rotation speed and the axial speed of the electron beam in the gyrotron are adjusted, which not only makes it difficult to adjust the output power and improve the performance, but also cannot adjust its working efficiency when it is matched with the gyrotron.

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