53.667 MHz重离子RFQ的不稳定性研究

Instability Research of 53.667 MHz Heavy Ion RFQ

摘要: 采用多粒子跟踪程序BEAMPATH对53.667 MHz RFQ进行模拟计算，基于RFQ腔体冷测、机械测量的结果，在考虑其入口束流不稳定性、电压不平整度、高频系统稳定度、加工误差、安装误差等因素的情况下，对RFQ的出口束流品质和不稳定性进行了系统分析。结果表明，在现有的加工、安装水平下，提高RFQ入口束流稳定度和高频系统稳定度对束流在RFQ中的传输十分必要。

Abstract: 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.