Bunch-by-bunch beam parameters monitor is a very useful tool for accelerator operation and optimization. An in situ bunch-by-bunch three-dimensional position and charge measurement system has been developed at the Shanghai Synchrotron Radiation Facility. Signals from beam position monitors carry almost full beam information, a broadband digital receiver can retain most information. Therefore, a four-channel wideband oscilloscope is employed to capture the signals from all electrodes of the beam position monitor. Correlation coefficient-based methods are used to extract these bunch-by-bunch parameters synchronously. We evaluated the performance of this bunch-by-bunch information extraction method, the measurement uncertainty of longitudinal phase is less than 0.2 ps, the uncertainty of transverse position is less than $10\mu \mathrm{m}$ and the charge uncertainty is 0.3% under the condition that the bunch charge is 600 pC. Thanks to the great performance of the new system, it is accurate enough to study the transient state during injection. In addition, an in situ wakefield measurement system is planned to be established based on this system.

中文翻译：

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在存储环中逐束进行三维位置和电荷测量

逐束光束参数监控器是加速器操作和优化的非常有用的工具。一种原位上海同步加速器辐射设施已开发出逐束的三维位置和电荷测量系统。波束位置监控器发出的信号几乎可以承载全部波束信息，宽带数字接收器可以保留大多数信息。因此，采用四通道宽带示波器捕获电子束位置监控器所有电极的信号。基于相关系数的方法用于同步提取这些逐束参数。我们评估了这种逐束信息提取方法的性能，纵向相位的测量不确定度小于0.2 ps，横向位置的不确定度小于$10\mu \mathrm{米}$在束电荷为600 pC的条件下，电荷不确定度为0.3％。由于新系统的出色性能，它足以精确地研究注入过程中的瞬态。另外，计划在该系统的基础上建立原位尾场测量系统。