The development and tests of high-power Y-circulator of the metre-wave range

A self-regulation system according to the signal of reflected voltage wave from the accelerator resonator (Y-circulator) is used for compensation of HF-field perturbation by an accelerated beam in the HF-supply system of the main part of accelerator-injector to the booster. To provide for conditions for reflected wave complete signal separation an option of accelerator resonator excitation through nonmutual ferrite devices, particularly through Y-circulator, is proposed. Results of developing and testings of high-power Y-circulator, operating at 148.5 MHz are presented. The following device parameters: VSWR - 1.05-1.15; direct loss - from 0.55 to 1.17 dB; decoupling - 23-25 dB are obtained under the optimal external field of ferrite magnetizing in the range of input HF-power from 0.6 to 3.8 MW. 8 refs.; 6 figs