45GHz/20kW gyrotron-based microwave generator for ECR ion source

This paper describes gyrotron-based microwave generator setup developed by IAP RAS jointly with GYCOM Ltd. and intended for use in superconducting ECR ion source FECRAL (a Fourth generation ECR ion source with Advanced design in Lanzhou, China) [1, 2]. The setup is capable to provide output power up to 20 kW in both CW and pulse (5-200 ms duration with less than 1 μs fall time and up to 10 Hz repetition rate) operation modes with 45 GHz frequency. The system includes quasioptical transmission line and mode converter from the Gaussian beam to TE01 or HE11 mode (at the user's option).