用于太赫兹光源的准等时性储存环的设计  

Design of a quasi-isochronous storage ring for THz light source

作　　者：朱家鹏[1] 徐宏亮[1] 冯光耀[1] 蓝杰钦[1] 

机构地区：[1]中国科学技术大学国家同步辐射实验室,合肥230029

出　　处：《强激光与粒子束》2012年第6期1453-1457,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(10875118)

摘　　要：介绍了一种获得准等时性储存环的方案,即调节Lattice参数,在色散段引入负色散函数从而降低线性滑相因子,获得短束团。根据此方案设计了用于相干太赫兹光源的准等时性储存环,结果给出了线形光学函数曲线以及粒子的动力学孔径,表明了通过调节四极铁参数可以达到降低束团长度获得准等时性储存环的目的。还设计了用于准等时性储存环弯铁处的真空室的3维模型,并对其类腔体部分的本征模进行了计算,得到特性阻抗与品质因数的比值在10-3量级以下,表明类腔体部分对束流的影响很小。A quasi-isochronous storage ring is designed by manipulating lattice parameters to introduce a negative dispersion function to the dispersion section.This quasi-isochronous storage ring is designed for a THz synchrotron radiation source.The simulation of the optics function and beam emittance shows its feasibility,and the tracing result of particles indicates that the designed ring has a good particle dynamic aperture.In addition,a three-dimensional model of the vacuum chamber used for photon radiation in the quasi-isochronous mode is also designed.The eigenmodes of the chamber are simulated,and characteristic parameters such as quality factor,power loss and characteristic impedance are also calculated.The result shows that the vacuum chamber has little effect on the circulating beam.

关 键 词：滑相因子 准等时性储存环 Lattice参数 光学函数 动力学孔径 特性阻抗 

分 类 号：TL594[核科学技术—核技术及应用]