High-Power 650 Mhz Cw Magnetron Transmitter for Intensity Frontier Superconducting Accelerators. Conference: Presented at the 3rd International Particle Accelerator Conference (IPAC-2012), New Orleans, Louisiana, 20-25 May 2012.

摘要

A concept of a 650 MHz high-power magnetron transmitter with a fast control in phase and power, based on two-stage injection-locked CW magnetrons, has been proposed to drive Superconducting Cavities (SC) for intensity-frontier accelerators. The transmitter consists of two 2-stage magnetrons with outputs combined with a 3- dB hybrid to fulfil a fast control of output power required for SC accelerators. The output power is controlled by varying phase in the input of one of the 2-stage magnetrons. For output power up to 250 kW we expect the output/locking power ratio to be about 30 to 40 dB in CW or quasi-CW mode with long pulse duration. The phase control bandwidth in MHz range has been evaluated measuring transient time of the phase jump with a 2-stage CW magnetron model operating in pulsed regime. Description of the magnetron transmitter concept and it's modelling using frequency-locked commercial, CW, 1 kW, S-Band magnetrons operating in pulsed regime with long pulse duration is presented and discussed in this paper.