Independent tuning microwave electron gun with external cathode

Abstract

The invention discloses an independent tuning microwave electron gun with external cathode which is composed of an external negative pole, namely, dipolar gun, a microwave cavity, a tuning mechanism, a first cavity input waveguide, a second cavity input waveguide and a cooling water pipe; the external negative pole and the microwave cavity are connected by Kovar flange argon-arc welding, the tuning mechanism and the microwave cavity are connected by braze welding in a hydrogen furnace, the first cavity input waveguide and the second cavity input waveguide are connected with the microwave cavity by braze welding, but the first cavity input waveguide and the second cavity input waveguide are connected at different longitudinal positions of the microwave cavity with the angles being mutually perpendicular, and then connected with a waveguide transmission line fed with microwave power respectively. The invention is designed to solve manufacture technique, so that the electron gun has simple structure and electron beam is excellent in performance, thus providing a novel electron beam source device for compact type free electron laser and electron linear accelerator.

Description

technical field [0001] The invention relates to an external cathode independently tuned microwave electron gun, which is a device for generating high-performance electron beams, and belongs to the field of charged particle accelerators and free electron lasers. Background technique [0002] With the improvement of the performance requirements of the free electron laser and the electron linear accelerator on the electron beam, the device for generating high-performance electron beam, that is, the electron gun, has emerged as the times require. At present, microwave electron guns that can meet this requirement include hot cathode microwave electron guns and photocathode microwave electron guns. Hot cathode microwave electron guns have been used in different electron linear accelerators since they came out in the 1980s, but their energy dissipation is relatively large, so additional equipment such as α-magnets and quadrupole magnets are needed to make the beam energy The dispe...

AI Technical Summary

Problems solved by technology

[0004] The technical problem of the present invention is: to overcome the shortcomings of the above-mentioned built-in hot cathode and photocathode microwave electron guns with large volume and complex technology, to provide an external hot cathode independently tuned microwave electron gun, to solve the manufacturing process, to make it simple in structure and excellent in electron beam performance , providing a new type of electron beam source device for compact free electron laser and electron linear accelerator

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