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介绍了在合肥光源研制的一套横向(x,y方向)高频、宽带逐束团测量和反馈系统,以及抑制耦合束团不稳定性的初步实验。其中重点介绍了在该系统研制过程中所涉及的部分关键技术:矢量运算模块的开发使得反馈系统的调试简易方便;Notch滤波器用于滤除反馈信号中的直流分量以及回旋频率分量,节省反馈功率;激励条带的研制。初步的反馈实验结果表明:反馈系统开启后不稳定性振荡得到抑制。
A set of horizontal (x, y direction) high-frequency, broadband beam-by-bunch measurement and feedback system developed at Hefei Light Source and the preliminary experiment of suppressing the instability of the coupled bunch are introduced. The key technologies involved in the development of the system are introduced in detail. The development of vector computing module makes the debugging of the feedback system simple and convenient. The Notch filter is used to filter the direct current component and the cyclotron frequency component of the feedback signal to save the feedback power The development of incentive strips. The preliminary feedback experimental results show that instability oscillation is suppressed after the feedback system is turned on.