Horizontal dispersion studies for the CERN Proton Synchrotron booster rings

In order to confirm the value of horizontal dispersion of the CERN Proton Synchrotron Booster (PSB) given by the MADX model, the horizontal dispersion has been measured using pick-ups and wire scanners on its four rings. The dispersion value of the PSB rings is of interest for example as input for the emittance measurements critical for high-brightness beam production for the LHC, for future optics studies related to the planned upgrades of the PSB or for optics studies of the ejection lines. In this study, the dispersion measurement protocol and the analysis of the measurements are presented. The measurement results point out differences with respect to the MADX model and also differences between the four rings. It was then investigated using horizontal orbit measurement and MADX matching routines whether misalignments of quadrupole magnets could explain these differences.