Offline Calibration Procedure of the Drift Tube Detectors

A detailed description of the calibration of the DT local reconstruction algorithm is reported. After inter-channel synchronization has been verified through the appropriate hardware procedure, the time pedestal can be extracted directly from the distribution of the digi-times. Further corrections for time-of-flight and time of signal propagation are applied as soon as the three-dimensional hit position within the chamber is known. The different effects of the time pedestal miscalibration on the two main hit reconstruction algorithms are shown. The drift velocity calibration algorithm is based on the meantimer technique and different meantimer relations for different track angles and patterns of hit cells are used. This algorithm can also be used to determine the uncertainty of the reconstructed hit position

Local Muon Reconstruction in the Drift Tube Detectors

This note describes the local reconstruction in the Drift Tube subdetector of the CMS muon subsystem. The local reconstruction is the sequence of steps leading from the TDC measurements to reconstructed three-dimensional segments inside each DT chamber. These segments are the input to the muon track reconstruction. This note updates and supersedes CMS NOTE 2002/04

The CMS Magnetic Field Map Performance

Peer reviewe