Development of a 1497-MHz, 13.5-kW Continuous- Wave Magnetron for Superconducting Radio Frequency Accelerator

Abstract

As a low operating cost microwave source, magnetron has been fully considered for superconducting radio frequency (SRF) accelerator. A 1497-MHz, 13.5-kW continuous-wave (CW) magnetron for SRF accelerator is designed and manufactured, and the test results meet the design requirements. Two simulation steps of designing magnetron with Computer Simulation technology (CST) Studio Suite are presented. First, the Microwave Studio helped to simulate the microwave coupled output structure and the resonant cavity. Then, the output performance of magnetron was simulated with particle-in-cell (PIC) solver. The cold test results show that the circuit efficiency is 93.14 %. A magnetron hot test platform was used to measure an output power of 14.23 kW and an electronic efficiency of 84.23 %. The injection locking experiment is completed at 4.5 kW. The frequency of the magnetron is adjustable, with a tunable bandwidth of 7 MHz through a mechanical tuning rod. The problems and solutions in the process of design and manufacture are summarized, which can provide a reference for the development of high-power magnetron with different frequency. The development of 1497-MHz magnetron broadens the selectable frequency of high-power magnetron, which is beneficial to its industrial applications.