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TY - CONF AU - Blaskovic Kraljevic, N. AU - Bett, D.R. AU - Burrows, P. AU - Christian, G.B. AU - Davis, M.R. AU - Kim, Y.I. AU - Perry, C. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Development of a Low-latency, High-precision, Intra-train Beam Feedback System Based on Cavity Beam Position Monitors J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - 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 intra-train beam stabilisation on electron bunches of charge ~ 1nC separated in time by c. 280ns. The system has been used to demonstrate beam stabilisation to below the 100nm level. Results of the latest beam tests, aimed at even higher performance, will be presented. PB - JACoW CP - Geneva, Switzerland SP - 2783 EP - 2785 KW - feedback KW - cavity KW - kicker KW - FPGA KW - controls DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-THOAA02 UR - http://jacow.org/ipac2014/papers/thoaa02.pdf ER -