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TY - CPAPER AU - Burrows, P. AU - Bett, D.R. AU - Blaskovic Kraljevic, N. AU - Bromwich, T. AU - Christian, G.B. AU - Davis, M.R. AU - Perry, C. TI - Progress Towards Electron-Beam Feedback at the Nanometre Level at the Accelerator Test Facility (ATF2) at KEK J2 - Proc. of International Beam Instrumentation Conference (IBIC2015), Melbourne, Australia, 13-17 September 2015 AB - Ultra-low latency beam-based digital feedbacks have been developed by the Feedback On Nanosecond Timescales (FONT) Group and tested at the Accelerator Test Facility (ATF2) at KEK in a programme aimed at beam stabilisation at the nanometre level at the ATF2 final focus. Three prototypes were tested: 1) A feedback system based on high-resolution stripline BPMs was used to stabilise the beam orbit in the beamline region c. 50m upstream of the final focus. 2) Information from this system was used in a feed-forward mode to stabilise the beam locally at the final focus. 3) A final-focus local feedback system utilising cavity BPMs was deployed. In all three cases the degree of beam stabilisation was observed in high-precision cavity BPMs at the ATF2 interaction point. Latest results are reported on stabilising the beam position to approximately 50nm. PB - JACoW CY - Geneva, Switzerland SP - 273 EP - 277 KW - feedback KW - cavity KW - operation KW - damping KW - kicker DA - 2016/01 PY - 2016 SN - 978-3-95450-176-2 DO - 10.18429/JACoW-IBIC2015-TUBLA04 UR - http://accelconf.web.cern.ch/AccelConf/IBIC2015/papers/tubla04.pdf ER -