Experiment of an Electron Gun for Ku Band Continuous Wave Klystron
2024 JOINT INTERNATIONAL VACUUM ELECTRONICS CONFERENCE AND INTERNATIONAL VACUUM ELECTRON SOURCES CONFERENCE, IVEC + IVESC 2024（2024）
Abstract
Tunable continuous wave klystrons, as the final power amplifiers, are widely used for uplink signal transmission in the satellite earth stations. Electron gun is the core component of the klystron, its stability determines the performance of the whole device. This article presents the design of a high perveance electron optical system for Ku band tunable continuous wave klystron. On this basis, the influence of electron gun structure design on cathode thermal efficiency is discussed, the electron gun sample is presented and the emission test is carried out. In condition of low working ratio pulse, the experimental results show that the pass rate of the electron beam is above 99%, and the pass rate under high frequency signal output state is more than 97.5%. This study has laid an important technical foundation for the development of tunable continuous wave klystrons.
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Key words
klystron,electron gun,electron optics,perveance
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