THE ATLAS MUON SPECTROMETER

ATLAS is a general purpose proton-proton experiment at the Large Hadron Collider (LHC) at CERN. The primary goal of the experiment is to operate at high luminosity (10³⁴ cm^-2 s^-1) with a detector that provides as many event signatures as possible. The quality of the muon measurement is insured by a system of three large superconducting air-core toroid magnets, precision tracking detectors with 80 μm intrinsic resolution and a dedicated trigger system. The ATLAS muon system is now in the construction phase. The main features of the muon spectrometer are presented in this paper together with the status of the chamber mass production.