Radial EIO (extended interaction oscillator) for high-power source

Abstract

The invention discloses a radial EIO (extended interaction oscillator) for a high-power source, belongs to the technical field of vacuum electronics, and relates to a high-power micro-wave and millimeter wave source technology. The invention designs a radial EIO adopting circular sheet electron beam under the limit of the cathode current emission density. The radial EIO comprises two disk bodies, a cathode, an insulated circular ring-shaped piece and an electron beam channel, wherein the disk bodies are symmetrically arranged in the longitudinal direction, and each disk body is provided with a control anode head and circular ring-shaped grooves. The EIO can obtain higher power under small current density by increasing the electron emission area and an electron beam channel area; compared with EIOs adopting other structures, the EIO can meet the requirement for high-power output; the EIO has better cooling capacity, and meanwhile, due to the specific cylindrical symmetry structure, machining becomes simple, and the assembly error can be effectively reduced; the cathode of an electron-optical system is located in the center of a device, the structure is compact, and the shock-proof performance is better.

Description

technical field [0001] The invention belongs to the technical field of vacuum electronics and relates to high-power microwave and millimeter wave source technologies. Background technique [0002] Extended Interaction Oscillator (Extended Interaction Oscillator, EIO) is an important class of millimeter-wave electric vacuum devices. It was mainly used as a high-power microwave radiation source in the early days. Now it has become an important high-power source in the millimeter-wave and even terahertz bands. device. As an oscillating device, the EIO slow-wave resonant circuit is shorter than the high-frequency system used by other types of oscillating devices such as return wave oscillators, thereby reducing the overall weight, reducing the device's requirements for technology, and easily ensuring machining accuracy. EIO usually consists of a slow wave structure with multiple coupling gaps to form a cavity, which not only ensures the improvement of power, bandwidth and effic...

AI Technical Summary

Problems solved by technology

However, the efficiency of this kind of EIO device with electron beam longitudinal propagation is still limited to a large extent by the size of the electron beam channel.

Due to the limited area of ​​the electron injection channel, to increase the working current, we can only proceed from the perspective of increasing the current density.

The increase of current density is limited by the research of new electron gun structure and new cathode material.

At the same time, the increase of the current density will lead to the enhancement of the space charge effect, which will produce a series of unfavorable situations in the interaction process

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