Updates on the development of MW-level Ka-band gyroklystron

Zhang, Liang and Wang, Li and Nix, Laurence and He, Wenlong and Cross, Adrian W.; (2021) Updates on the development of MW-level Ka-band gyroklystron. In: 2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT). UCMMT 2021 - UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies . IEEE, GBR, pp. 1-3. ISBN 9781665438537 (https://doi.org/10.1109/UCMMT53364.2021.9569900)

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Abstract

In this paper, a gyroklystorn operating at 36 GHz was designed to drive a harmonic linearizer for the CompactLight Xray Free electron laser. Linear theory, non-linear theory and Particle-In-Cell simulations were used to design a three cavity 36 GHz gyro-klystron of gain 39 dB that is capable of producing 3.2 MW of power corresponding to an efficiency of 43% at a pulse repetition frequency of 1 kHz. Analysis of the phase stability of the amplifier found that 0.34° phase stability can be achieved for a variation in modulator voltage of 0.01%. When driven by a K100 (150kV, 50A) Scandinova modulator, the 36GHz gyro-klystron was a viable power source for a 6th harmonic linearizer.