Instability Research of 53.667 MHz Heavy Ion RFQ

Based on the database from RFQ cavity cold model test and tip-pole geometry measurement, 53.667 MHz RFQ was simulated by BEAMPATH code. The RFQ output beam quality and instability were analyzed as functions of input beam instability, voltage roughness, stability of RF control system, RFQ manufacturing error, and misalignment. According to these results, it shows that it is essential for beam transmission in RFQ to improve input beam stability and RF control system stability at the present level of machining and alignment.