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合肥光源升级改造任务已基本完成,注入器实现满能量注入。为适应新的注入器束流强度的测量需求,设计了新的注入器束流强度测量系统,该系统利用安装在真空腔上的3个快速束流变压器(FCT)和2个积分束流变压器(ICT),能够实现束流流强和电荷量的非拦截实时测量。为了准确获取束流参数,首先对束流变压器(CT)传输电缆进行了在线和离线标定;由于ICT输出信号信号幅度较小,噪声大,设计了低噪声前置放大器以改善信噪比;考虑低频谐波噪声和Kicker噪声的干扰,软件中通过适当的算法对噪声进行了处理;最后给出了部分在线实验结果。实验结果表明,束流传输效率约为27.4%,注入效率约为44.3%。
Hefei light upgrade tasks have been basically completed, injectors to achieve full energy injection. In order to meet the needs of new injector beam intensity measurement, a new injector beam current intensity measurement system was designed. The system utilizes three fast beamformers (FCTs) and two integral beamformers (ICT) that enables non-blocking real-time measurements of beam current and charge levels. In order to acquire the beam parameters accurately, the cable of the CT transformer was calibrated on-line and off-line firstly. Because of the small signal amplitude and high noise of the ICT output signal, the low noise preamplifier was designed to improve the signal-to-noise ratio. Low-frequency harmonic noise and Kicker noise interference, the software used to deal with the noise by a suitable algorithm; finally gives some of the online experimental results. The experimental results show that the beam transmission efficiency is about 27.4% and the injection efficiency is about 44.3%.