Calibration and Performance of the ATLAS Muon Spectrometer

The ATLAS muon spectrometer is designed to measure muon momenta with a resolution of 4% @ 100 GeV/c rising to 10% @ 1 TeV/c track momentum. The spectrometer consists of precision tracking and trigger chambers embedded in a 2T magnetic field generated by three large air-core superconducting toroids. The precision detectors provide 50 μm tracking resolution to a pseudorapidity of 2.7. The system also includes an optical monitoring system which measures detector positions with 40 μm precision. This paper reports on the calibration and performance of the ATLAS muon spectrometer.