Suppression of self-oscillation in high gain relativistic klystron amplifier by RF lossy material

An X-band overmoded relativistic klystron is proposed, the operation mode of which is the TM02 mode. The drift tube could not cut off the TM01 mode; isolating the buncher cavity from the input cavity is achieved by introducing a sectional RF lossy material. Microwaves are extracted from the modulated electron beam using a cylindrical waveguide, rather than a coaxial waveguide; thereby, the output structure is significantly simplified. Particle-in-cell simulations show that microwaves with power of 1.28 GW and frequency of 9.30 GHz can be obtained, corresponding to an efficiency of 32% and relative bandwidth of about 8%.

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An X-band overmoded relativistic klystron

Xiao

Chen

Deng

et al. 2014

Physics of Plasmas

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Suppression of self-oscillation in high gain relativistic klystron amplifier by RF lossy material

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An X-band overmoded relativistic klystron

An X-band overmoded relativistic klystron

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