Shaft-coupled double-period electron accelerator tube and method for frequency up-regulation of accelerator and cavity

Abstract

The invention discloses an axis coupled double-cycle electron accelerating tube, an accelerator and a cavity ascending frequency adjusting method. A plurality of accelerating cavities and coupling cavities are alternately arranged in the accelerating tube, axially distributed and radially symmetric about an axis, mutually communicated electron beam holes are formed in radial symmetric lines, convex cone structures radially symmetric about the axis of the accelerating tube are arranged on two end faces of each of the accelerating cavities and / or the coupling cavities and positioned at the outer edges of the electron beam holes, and the axial distance between the two convex cone structures is positively correlated to the latent frequency of the corresponding cavities. The convex cone structures capable of adjusting the latent frequency of the corresponding cavities are arranged in the cavities of the axis coupled double-cycle electron accelerating tube, a new scheme is provided for adjustment of the latent frequency of the cavities, and the axis coupled double-cycle electron accelerating tube particularly has outstanding advantages for small radio-frequency accelerators.

Description

technical field [0001] The invention relates to an electron accelerating device used in nuclear technology and medical fields and a frequency adjustment method for processing and debugging the electron accelerating device. More specifically, the present invention relates to a shaft-coupled double-period electron acceleration tube, a standing wave electron linear accelerator and a cavity up-frequency adjustment method used in the nuclear technology and medical fields. Background technique [0002] An electron linear accelerator is an acceleration device that uses microwave electromagnetic fields to accelerate electrons and has a linear motion track. It is widely used in the medical field, such as common CT machines (ie, computerized tomography cameras), the most critical components of which are Electron linear accelerators use the basic principle that accelerators accelerate electrons to generate high-energy X-rays. [0003] Microwave, also known as "ultra-high frequency ele...

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Problems solved by technology

The advantage of this method is that it increases the maximum power density of the acceleration cavity, which can fully increase the acceleration gradient and shorten the acceleration length. The disadvantage is that the quality factor of the accelerator is low and the power loss is large.

[0011] In the above two existing designs of accelerating tubes, although each has its own advantages and disadvantages, it does not give any parameters related to the cavity eigenfrequency of the accelerating cavity and the coupling cavity, that is, it does not give how to adjust the frequency of the disk-loaded waveguide. The best solution to make the eigenfrequency of the cavity can be adjusted up-frequency in the processing and debugging of the accelerating tube

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