SSC-LINAC重离子RFQ动力学模拟与研究  

Beam Dynamics Simulation and Research of SSC-LINAC Heavy Ion RFQ

作　　者：张小虎[1,2] 原有进[1] 夏佳文[1] 刘戈[3] 殷学军[1] 杜衡[1,2] 李钟汕 陆元荣[3] 何源[1] 

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]中国科学院大学,北京100049 [3]北京大学重离子物理研究所,北京100871

出　　处：《原子核物理评论》2015年第1期50-53,共4页Nuclear Physics Review

基　　金：国家自然科学基金创新研究群体科学基金(11221064);国家重点基础研究发展计划(973计划)项目(2014CB845500)~~

摘　　要：采用多粒子跟踪程序BEAMPATH对SSC-LINAC重离子RFQ直线加速器进行动力学模拟,分别对RFQ的接受度、高频特性、束流稳定性、空间电荷效应等进行了分析。该RFQ具有很大的纵向接受度,有利于束流在RFQ中的传输;高频特性研究表明,翼间电压设定在理论值以上时,该RFQ都能保持较好的束流特性;束流稳定性分析结果表明,该RFQ具有很大的束流失配容忍度;空间电荷效应研究表明,当束流强度低于0.5 m A时,束流传输不受影响。综合研究结果表明,53.667 MHz重离子RFQ具有较好的动力学特性,满足SSC-LINAC直线加速器的设计要求。The RFQ beam dynamics of a heavy ion linac was investigated in this paper and the BEAMPATH code was employed in this study. The main research was focused on the beam performances depending on longitudinal acceptance, RF properties, beam instability and space charge effect. The RFQ has large longitudinal acceptance in design, which brings the beam performances well. In the RF parameter study, the beam can keep good transmission in the acceleration even the vane voltage is larger than the theoretical value. It is also shown that the RFQ has a large robustness for the mismatch of the input beam by the analysis of the beam instability.Furthermore, the beam evolution is independent on the space charge effect when the beam current is less than 0.5em A. The preliminary analysis of the beam dynamics shows that the 53.667 MHz heavy ion RFQ has a promising performance, which meets the requirements of SSC-LINAC.

关 键 词：BEAMPATH 接受度 高频特性 稳定性 空间电荷效应 

分 类 号：O572.211[理学—粒子物理与原子核物理]