Characterization of the slow extraction frequency response

The main physics program of the CERN Super Proton Synchrotron (SPS) is dedicated to fixed target experiments hosted in North experimental Area (NA). Protons are delivered NA via third-integer resonant slow extraction over an almost 5 s flattop. In order maximize usable intensity experiments, flux extracted particles should be kept as constant possible. This a very general requirement for served by synchrotrons. Power supply ripples well-known issue extraction, affecting quality spill. A long-standing effort ongoing at characterize SPS frequency response its power supplies. this paper, beam dynamics simulations employed understand and process, combined with based measurements.