BEPCII横向束流反馈系统的梳状滤波器  

Performance of a notch filter for BEPCII

作　　者：岳军会[1] 张磊[1] 马力[1] 曹建社[1] 

机构地区：[1]中国科学院高能物理研究所,北京100049

出　　处：《强激光与粒子束》2005年第12期1917-1920,共4页High Power Laser and Particle Beams

摘　　要：BEPCII是一个多束团、大流强的装置,由于高频腔的高次模和电阻壁阻抗等因素,不可避免地会出现束流不稳定性。BEPCII中采用束流反馈系统来抑制束流不稳定性。横向束流反馈系统主要包括前端电子学、信号处理电子学、反馈器件和放大器等几个部分。梳状滤波器是信号处理电子学的重要部件,利用两根长短不同的电缆以及一个功分器和合成器构成了一种简单有效的梳状滤波器,其梳状深度达到-41dB,使用这种梳状滤波器的横向反馈系统成功地抑制了束流中出现的不稳定性。The high beam current （0.9 A） and the large number of bunches （93 bunches） may cause coupled bunch instabilties （CBI） in BEPCⅡ. Active feedback systems are required to suppress CBI. The BEPCⅡ transverse feedback system mainly includes three parts that are the signal detection unit, the signal processing unit, and the kicker. The notch filter is an important part of the signal processing unit. In this paper a simple notch filter which is combined with two cables, a splitter and a combiner is introduced. And a -41 dB notch depth is achieved. Transverse feedback system with this notch filter succeeds in curing the instability of the beam. It is proved that the filter can satisfy the requirement of the BEPCⅡ transverse feedback system.

关 键 词：横向反馈系统 梳状滤波器 电缆 梳状深度 

分 类 号：TL501[核科学技术—核技术及应用]