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DOE OSTI · 1805261

Recent improvements in beam orbit feedback at NSLS-II

Kongtawong, Sukho·Tian, Yuke·Yang, Xi·Ha, Kiman·Yu, Li Hua·Shaftan, Timur
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Abstract

This paper discusses improvements made to the fast orbit feedback (FOFB) system at NSLS-II in 2019. We first characterized the system by measuring the transfer function and the closed-loop gain of the system. We also constructed a model to predict the performance, which was based on physical behaviors. After finding and fixing the sources of the latency, we improved the closed-loop gain’s bandwidth from 250 Hz to 400 Hz in the horizontal plane and 250 Hz to 300 Hz in the vertical plane. As a result, the orbit beam instability improved by 30% and 10% in the horizontal and vertical planes, respectively.

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36 MATERIALS SCIENCEFast orbit feedbackNSLS-IISynchrotron light source

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Kongtawong, Sukho, Tian, Yuke, Yang, Xi, Ha, Kiman, Yu, Li Hua, Shaftan, Timur. 2020-06-08. Recent improvements in beam orbit feedback at NSLS-II. https://doi.org/10.1016/j.nima.2020.164250

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