Theoretical and experimental studies of multi-port RF power feeding in rod-type radio frequency quadrupole (RFQ) linac

An analytical and experimental study of multi-port RF power feeding in a four rod-type radio frequency quadrupole (RFQ) has been discussed. First, we have derived generalized relations for multi-coupler based on S-parameters n balanced couplers. Using simulation measurements prototype, the optimum position orientation two couplers an 80 MHz extended vane rod type RFQ determined. A low test carried out to show phase balancing using S parameter analysis mock-up RFQ. As corroborative study, tip voltage measured with vector voltmeter showed that corresponding fed through single coupler (β = 1) agrees value when same is or