On forced RF generation of CW magnetrons for superconducting accelerators

On forced RF generation of CW magnetrons for superconducting acceleratorsHigh power CW magnetrons, designed and optimized for industrial RF heaters, were suggested to power Superconducting RF cavities due to their higher efficiency and lower cost of RF power per Watt comparing to klystrons, IOTs or solid-state amplifiers.RF amplifiers driven by a master oscillator serve as controllable coherent RF sources.CW magnetrons are regenerative RF generators with a huge regenerative gain.Very large regenerative gain causes instability with large noise when a magnetron operates with the anode voltage higher than the threshold of self-excitation.Traditionally for stabilization of magnetrons is used injection locking by a quite small signal.In this case the CW magnetrons do not provide correlation of the magnetron startup with the injected locking signal.Thus, the magnetron except the injection locked oscillations may generate large noise.This may preclude the required suppression of microphonics and will increase emittance of the beam in SRF accelerators.Required Field Control to meet accelerator performance: -Proton/ion Accelerators/Rings: 0.5 o and 0