Development of a Low-latency, High-precision, Intra-train Beam Feedback System Based on Cavity Beam Position Monitors
Development of a Low-latency, High-precision, Intra-train Beam Feedback System Based on Cavity Beam Position Monitors
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基于腔梁位置监测器的低延迟、高精度列车内梁反馈系统的开发
DOI：
10.18429/jacow-ipac2014-thoaa02
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
C. Perry
中科院分区：
文献类型：
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作者：
N. Kraljevic;D. Bett;P. Burrows;G. Christian;M. Davis;Y.I.Kim;C. Perry
利用腔束流位置监测器（BPM）的低延迟、列车内束流反馈系统已在KEK加速器测试设施（ATF 2）的最终焦点处开发和测试。低Q腔BPM与定制信号处理电子器件一起使用，设计用于低延迟和最佳位置分辨率，以向反馈系统提供输入光束位置信号。一个定制的带状线冲击器和功率放大器，和一个基于FPGA的数字反馈板，分别用于提供光束校正和反馈控制。该系统部署在单通，多束团模式，目的是演示在时间上间隔为c的电荷~1 nC的电子束团上的束内稳定。280 ns。该系统已被用来证明光束稳定到低于100 nm的水平。最新的梁测试的结果，旨在更高的性能，将提出。
A low-latency, intra-train, beam feedback system utilising a cavity beam position monitor (BPM) has been developed and tested at the final focus of the Accelerator Test Facility (ATF2) at KEK. A low-Q cavity BPM was utilised with custom signal processing electronics, designed for low latency and optimal position resolution, to provide an input beam position signal to the feedback system. A custom stripline kicker and power amplifier, and an FPGA-based digital feedback board, were used to provide beam correction and feedback control, respectively. The system was deployed in single-pass, multi-bunch mode with the aim of demonstrating intratrain beam stabilisation on electron bunches of charge ~1 nC separated in time by c. 280 ns. The system has been used to demonstrate beam stabilisation to below the 100 nm level. Results of the latest beam tests, aimed at even higher performance, will be presented.