10 MW, 91 GHz gyroklystron for high frequency accelerator research

Calabazas Creek Research Inc. is developing a gyroklystron amplifier for W-Band linear accelerator applications. The device will be available for testing W-Band accelerator components and systems. The gyroklystron will operate at 91.392 GHz and is predicted to produce 10 MW of RF power with an efficiency greater than 38% and a gain of 55 dB. The design uses the second-harmonic mode to reduce the magnetic field requirement and use available TWT drivers. The current circuit design employs six cavities consisting of an input cavity, four buncher cavities and a final output cavity. The output mode is a hybrid TE₀₁TE₀₂ mode which facilitates transmission with reduced loss and flexibility for incorporating bends in the transmission system. The device is capable of depressed collector operation. The gyroklystron is fully assembled and ready for high power testing.