Transverse bunch-by-bunch feedback system for time-resolved experiments at PLS-II,Journal of Synchrotron Radiation

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Transverse bunch-by-bunch feedback system for time-resolved experiments at PLS-II
Journal of Synchrotron Radiation ( IF 2.4 ) Pub Date : 2021-07-08 , DOI: 10.1107/s1600577521005889
Jaeyu Lee ₁ , T Nakamura ₂ , K Kobayashi ₂ , D T Kim ₁ , T Ha ₁ , G R Hahn ₁ , K J Kim ₁ , S Shin ₁

Affiliation

A description of the upgraded bunch-by-bunch feedback system for time-resolved experiments at Pohang Light Source II (PLS-II) is provided. The bunch-by-bunch feedback system has been upgraded to increase the single-bunch current in the hybrid fill pattern of the PLS-II facility. The project is part of the SPring-8 and PLS-II collaboration. The main features of the upgrade are to employ a single 500 MHz analog-to-digital converter (ADC) instead of the previous four 125 MHz interleaved ADCs for 500 MHz rate, to replace a single-loop two-dimensional feedback with two independent one-dimensional feedback loops, to implement the tune measurement function with a single bunch, and mainly to implement single-bunch and stretcher control. The realization of a 400 mA hybrid fill pattern including a 10 mA single bunch demonstrates the precision of the upgraded bunch-by-bunch feedback system.

中文翻译：

用于 PLS-II 时间分辨实验的横向逐束反馈系统

提供了用于浦项光源 II (PLS-II) 时间分辨实验的升级后的逐束反馈系统的描述。逐束反馈系统已升级，以增加 PLS-II 设施混合填充模式中的单束电流。该项目是 SPring-8 和 PLS-II 合作的一部分。升级的主要特点是采用单个 500 MHz 模数转换器 (ADC) 代替之前的四个 500 MHz 速率的 125 MHz 交错式 ADC，以两个独立的单回路二维反馈代替单回路二维反馈维反馈回路，实现单束调谐测量功能，主要实现单束和展宽控制。

更新日期：2021-09-03

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