Frequency tuning and high power test for separated function radio frequency quadruple accelerator

A step motor for frequency tuning was installed inside the separated function radio frequency quadruple(SFRFQ) accelerator. The operating frequency of the SFRFQ cavity can therefore be precisely tuned at 26.07 MHz either manually or by computer algorithm, and then the resonant frequency match can be achieved between SFRFQ and RFQ cavities in our combined accelerator system. Also the roentgen spectrum in the high power test of the SFRFQ cavity shows that the inter-vane voltage reaches 86.2 kV, exceeding the design value 70 kV, when the input signal has 1/6 duty cycle and 28.8 kW peak power.