Determination of the Spatial Drift-Tube Resolution using Muon Tracks

The spatial resolution of a single drift tube in monitored-drift-tube (MDT) chambers of the ATLAS muon spectrometer has to be known in order to ensure optimal muon track reconstruction. In the present note, an iterative procedure and its improvement which allows the in-situ determination of the spatial resolution is described. Both methods do not need an external reference, but use the tracks reconstructed in the drift-tube chambers. Results obtained with both methods on simulated and experimental data are shown.