Design and functionality of the LEP Q-meter
K D Lohmann, M. Placidi, Hermann Schmickler · CERN Document Server (European Organization for Nuclear Research) · 1990
The LEP Q-Meter allows the excitation and observation of transverse beam oscillations.The instrument is used for continuous tune measurements but also for single shot precision measurements of spectra which contain all beam resonances.As the repetition rate of signals at LEP is low, the Q-Meter has been conceived around two fast processors treating the beam data on-line at the pace of the LEP revolution frequency.