报道了工作点测量技术的研究现状, 对束流频谱分析用于工作点测量的方法进行了详细说明。介绍了上海光源储存环工作点测量系统的物理需求、方案设计、硬件结构及关键设备选型。采用束流实验的方法对系统配置参数进行优化, 对系统测量误差及分辨力进行测试评估, 讨论了测量系统不同工作模式的优缺点, 并给出加速器不同运行阶段应该采用的运行模式。优化后的上海光源工作点测量系统, 其系统测量误差小于0.000 1, 测量分辨力好于0.000 05, 测量过程对束流轨道及等效束斑尺寸的扰动控制在μm量级, 现已在上海光源运行及机器研究中投入实用。

This paper presents the status of various tune measurement techniques, and describes the beam spectra analysis method based on turn-by-turn beam position data. The physical requirements, hardware layout and key modules of the betatron tune monitor system is introduced for the Shanghai Synchrotron Radiation Facility(SSRF) storage ring. A series of beam experiments have been carried out in order to optimize system configuration, and to evaluate systematic measurement error and resolution. The comparison of various running modes of the tune monitor are made, and suitable running modes are analyzed for different accelerator operation phases. The experimental data show the resolution of SSRF storage ring tune monitor is better than 0000 05 and the systematic measurement error is smaller than 0.000 1 after optimization. The disturbances on beam orbit and beam size during measurement are minimized down to micron level. The tune monitor is online for SSRF user operation and machine study now.