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- P. Burrows
Queen Mary University of London, London
- G.B. Christian, A.F. Hartin, H.D. Khah, G.R. White
JAI, Oxford
- C.C. Clarke, C. Perry
OXFORDphysics, Oxford, Oxon
- A. Kalinin
CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
- D.J. McCormick, S. Molloy, M.C. Ross
SLAC, Menlo Park, California
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We report on the design and testing of the 3rd generation Feedback On Nanosecond Timescales (FONT) prototype intra-train beam-based feedback system for beam control and luminosity optimisation at the International Linear Collider (ILC). The all-analogue FONT3 electronics was designed to have an ultra-short latency of c. 10ns. We describe the design of the BPM signal processor, feedback circuit and kicker-driver amplifier. We report on deployment of FONT3 at the Accelerator Test Facility (ATF) at KEK, where it was tested with the 56ns-long electron bunchtrain extracted from the ATF damping ring. Feedback, with delay-loop operation, on the beam was demonstrated with a latency close to design. We comment on the applicability of this technology to ILC, as well as future warm-RF based linear colliders, such as CLIC.
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