LHCb; muon; gas detector; Multi Wire Proportional Chamber; simulation; time resolution; efficiency; electronics; system optimization
The LHCb muon detector is composed of 1380 Multi Wire Proportional Chambers (MWPCs). To obtain the required performance the muon chambers have to be operated at the lowest possible threshold. At the same time the detectors should be operated at the lowest possible high voltage.<br />This work describes a detailed simulation study of all the time resolution limiting parameters of the MWPCs in order to find out how they contribute to time resolution and therefore affect the threshold settings.<br />In a next step an optimization of the electronics thresholds for the different chamber types was performed. The thresholds keep the noise in the system at an acceptable level while conserving time resolution and efficiency. Knowing this one can now start to optimize the high voltage settings.<br />The last chapter finally concentrates on the presentation of results obtained by analysing cosmics data and first collision data aquired in LHCb.