Study of separated function radio frequency quadrupoles accelerator  

作　　者：王智 陈佳洱 陆元荣 郭之虞 颜学庆 朱昆 康明磊 方家驯 

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University

出　　处：《Chinese Physics C》2010年第4期502-505,共4页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10455001);China Postdoctoral Science Foundation

摘　　要：SFRFQ （Separated Function Radio Frequency Quadrupoles） accelerator is a new post accelerator of RFQ （Radio Frequency Quadrupoles） type, which has been developed since the beginning of the 1990s at Peking University. In order to demonstrate the possibility of the SFRFQ, a prototype cavity has been designed. A special dynamics design method has been proposed to avoid the sparking problem and decrease the energy spread at the exit of SFRFQ. It consists of two aspects： the asymmetry structure design for transverse focusing and the inner buncher design for longitudinal bunching. This allows the improvement of the beam properties without increasing the cavity length. The simulation results show that the energy spread can be substantially reduced by using the inner buncher in the SFRFQ structure.SFRFQ （Separated Function Radio Frequency Quadrupoles） accelerator is a new post accelerator of RFQ （Radio Frequency Quadrupoles） type, which has been developed since the beginning of the 1990s at Peking University. In order to demonstrate the possibility of the SFRFQ, a prototype cavity has been designed. A special dynamics design method has been proposed to avoid the sparking problem and decrease the energy spread at the exit of SFRFQ. It consists of two aspects： the asymmetry structure design for transverse focusing and the inner buncher design for longitudinal bunching. This allows the improvement of the beam properties without increasing the cavity length. The simulation results show that the energy spread can be substantially reduced by using the inner buncher in the SFRFQ structure.

关 键 词：SFRFQ beam dynamics energy spread 

分 类 号：O572.211[理学—粒子物理与原子核物理]