The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CPAPER AU - Fox, J.D. AU - Bartosik, H. AU - De Santis, S. AU - Dusatko, J.E. AU - Höfle, W. AU - Rivetta, C.H. AU - Salvant, B. AU - Turgut, O. AU - Wehrle, U. TI - Wideband Vertical Intra-Bunch Feedback at the SPS - Technology Development, Recent Accelerator Measurements and Next Steps J2 - Proc. of International Beam Instrumentation Conference (IBIC2015), Melbourne, Australia, 13-17 September 2015 AB - A wideband vertical intra-bunch feedback system is in development at the CERN SPS for use to control potential Ecloud and TMCI instabilities. The work is motivated by planned intensity increases from the LIU and HL-LHC upgrade programs. System technical features include pickups, upgraded kickers and related RF power amplifiers, analog processing with 1 GHz bandwidth, with a with 4 GS/sec reconfigurable digital signal processing system. Recent results include driven beam experiments and beam simulation methods to verify the damping provided by the wideband system, and validate reduced MIMO models and model-based controllers. Noise effects and uncertainties in the model are evaluated via SPS measurements to predict the limits of control techniques applied to stabilize the intrabunch dynamics. We present data showing the excitation and damping of unstable modes. The plans for the next year, including experimental measurements, hardware upgrades and future control developments are described. PB - JACoW CY - Geneva, Switzerland SP - 595 EP - 601 KW - feedback KW - controls KW - simulation KW - kicker KW - damping DA - 2016/01 PY - 2016 SN - 978-3-95450-176-2 DO - 10.18429/JACoW-IBIC2015-WECLA04 UR - http://accelconf.web.cern.ch/AccelConf/IBIC2015/papers/wecla04.pdf ER -