High-order-mode coaxial output cavity

Abstract

The invention provides a high-order-mode coaxial output cavity which has a broad spectrum spurious-mode inhibition function and consists of a high-order-mode coaxial resonant cavity, a spurious-mode inhibition device and an output waveguide. The spurious-mode inhibition device comprises an attenuation cavity contained with a microwave absorption material, a radial waveguide enabling all modes including a working mode in the high-order-mode coaxial resonant cavity to be transmitted outwards and enabling the residual modes except the working mode, namely non-working modes to be transmitted to the attenuation cavity, and a choke flow waveguide producing equivalent short circuit to the working mode at the connecting position of the choke flow waveguide and the radial waveguide so as to limit the working mode in the high-order-mode coaxial resonant cavity and enabling the working mode not to be transmitted into the attenuation cavity. Therefore, the working mode is not influenced while clutter-spectrum levels can be reduced, and a speed regulating tube can stably operate in the working mode.

Description

technical field [0001] The invention relates to a special component of a microwave electric vacuum device, in particular to a high-order mode coaxial output cavity for a multi-beam klystron that can work in a single mode. Background technique [0002] As a microwave power source, high peak power klystrons have important application value in the field of high-energy physics. The further development of large-scale scientific experimental devices such as high-energy accelerators, colliders, and free electron lasers in the direction of compactness and high acceleration gradients is of great importance to high-frequency bands. High power klystrons create a need. [0003] The traditional klystron uses a resonant cavity that works in the fundamental mode. Since the operating frequency is inversely proportional to the volume of the cavity, the volume of the cavity will become smaller and smaller as the operating frequency increases. The smaller volume of the klystron cavity reduces...

AI Technical Summary

Problems solved by technology

Previously, the technology of coupling a cylindrical absorbing cavity outside the output cavity through the coupling hole was mostly used for the suppression of heterogeneous modes in the klystron. The main disadvantage of this technology is that it can only absorb and suppress specific oscillation modes, and has no effect on the working mode. certain attenuation

In addition, since the klystron heterogeneous mode oscillation frequency cannot be determined in advance, with this method, corresponding measures can only be taken after the oscillation problem occurs

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