The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Dusatko, J.E. AU - Bjørsvik, E.R. AU - Fox, J.D. AU - Höfle, W. AU - Rivetta, C.H. AU - Turgut, O. ED - Liu, Zhengzheng ED - Lidia, Steven ED - McCausey, Amy ED - Schaa, Volker RW TI - The SPS Wideband Feedback Processor: A Flexible FPGA-Based Digital Signal Processing Demonstration Platform for Intra-Bunch Beam Stability Studies J2 - Proc. of IBIC2017, Grand Rapids, MI, USA, 20-24 August 2017 C1 - Grand Rapids, MI, USA T2 - International Beam Instrumentation Conference T3 - 6 LA - english AB - A flexible digital signal processing platform based on FPGA technology has been developed for vertical intra-bunch beam stability studies at the CERN SPS. This system is unique in that samples at a very high rate (4GSa/s) in order to measure and control motion within the 1.7ns proton beam bunch. The core of the system is an FPGA-based digital signal processor. Being programmable, it enables fast development of control algorithms. The processor, together with its supporting components forms a complete platform for demonstration studies of beam instability measurement and control. This system is capable of operation as either a stand-alone arbitrary waveform generator for driven mode instability studies, a closed-loop feedback control system for stability control and as a diagnostic instrument for measurement of beam motion. Recent measurements have shown the system is effective at damping single-bunch and bunch train intra-bunch instabilities with growth times of 200 turns. This paper summarizes the system design, provides some operational highlights, describes the upgrades performed to date and concludes with a description of the next generation processor now in development. PB - JACoW CP - Geneva, Switzerland SP - 309 EP - 313 KW - ion KW - feedback KW - controls KW - FPGA KW - interface DA - 2018/03 PY - 2018 SN - 978-3-95450-192-2 DO - 10.18429/JACoW-IBIC2017-WE1AB1 UR - http://jacow.org/ibic2017/papers/we1ab1.pdf ER -