分离作用射频四极场加速器中动力学参数与极限流强的探讨  

Relation between dynamic parameters and limiting current in separated function radio frequency quadrupole accelerator

作　　者：王智[1] 陈佳洱[1] 颜学庆[1] 陆元荣[1] 方家驯[1] 郭之虞[1] 

机构地区：[1]北京大学重离子物理研究所,北京100871

出　　处：《物理学报》2006年第12期6298-6301,共4页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10455001)资助的课题.~~

摘　　要：系统分析了粒子在分离作用射频四极场(RFQ)加速结构中的运动,导出了极限流强与动力学参数的关系.存在于分离作用RFQ膜片加速间隙处的加速电场,较传统的RFQ能更加有效地加速带电粒子.四杆电极之间的射频四极场,对粒子的横向具有聚焦或者散焦作用,通过适当选取粒子动力学参数可以保证粒子在分离作用RFQ中横向和纵向运动的稳定性.The particles＇ motion in separated function radio frequency quadrupole （SFRFQ） accelerator is analyzed in this paper. Compared to conventional radio frequency quadrupole accelerator, the SFRFQ structure has higher accelerating efficiency, and the particles are focused or defocused by the quadrupole outside the diaphragms. The relation between limiting current and dynamic parameters has been deduced, so the transverse and longitudinal stability of particles in SFRFQ is ensured by selecting proper dynamic parameters.

关 键 词：分离作用射频四极场加速器 稳定性 反场 极限流强 

分 类 号：O437[机械工程—光学工程]