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Recent Measurements of a 4 GS/s Intra-bunch Vertical Feedback System at the SPS
Aula Divisione Acceleratori (LNF INFN)
Aula Divisione Acceleratori
Via Enrico Fermi, 40
Experimental measurements taken from SPS machine development studies with an intra-bunch feedback channel are presented. These studies use a 3.2 GS/s digital signal processing system to implement general-purpose control algorithms on multiple samples across a single SPS bunch. These initial studies concentrate on single-bunch motion, and study the vertical betatron motion as the feedback control is varied. The studies are focused on validating simulation models of the beam dynamics with feedback, and time and frequency domain results include excitation and damping of intra-bunch motion with positive and negative feedback. We present an overview of the challenges of intra-bunch feedback, and first measurements of the feedback system at the SPS.