With the installation of the first insertion device U7 and more and more sophisticated experiments in the Pohang Light Source (PLS), the synchrotron radiation users now demand more accurate measurement and control of the closed orbit. As the essential part of the accurate orbit measurement and feedback, all the BPM electronics and data acquisition system have been upgraded. In the new BPM system, we adopted a commercial BPM processor, which has better than 5 /spl mu/m accuracy over 65 dB dynamic range of input signal. The data acquisition board is made in-house utilizing a fast ADC and an on-board microprocessor. New BPMs and various machine diagnostics on the orbit drift with the aid of new BPMs will be described in this paper.
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机译：随着第一个插入装置U7的安装以及浦项光源（PLS）中越来越复杂的实验，同步辐射用户现在需要更精确地测量和控制闭合轨道。作为精确轨道测量和反馈的重要部分，所有BPM电子设备和数据采集系统均已升级。在新的BPM系统中，我们采用了商用BPM处理器，在65 dB输入信号的动态范围内，其精度超过5 / spl mu / m。数据采集板由内部使用快速ADC和板载微处理器制成。本文将介绍新的BPM和借助新的BPM对轨道漂移进行的各种机器诊断。
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