A new rebuncher at the beam line from SFC to SSC for HIRFL

A new rebuncher was constructed and tested successfully with beams in HIRFL at IMP in last year. There were two old identical rebunchers on the beam line from SFC to SSC in HIRFL. But they have never been worked well with some serious problems since 1988. The new rebuncher was decided to build instead of old one in order to improve the performance of the HIRFL accelerator system and also to meet the needs on the CSR project. The new rebuncher based on λ/4 coaxial resonator with a shorting plate and two movable plates. It has wide resonant frequency range from 22 to 54 MHz. The RF power feed into the cavity by coupling loop, the maximum output power of the amplifier is up to 40 kW and the bunching voltage on the two gaps is more than 150 kV. (author)