SOME GENERAL INFORMATION ABOUT ATLAS MUON SPECTROMETER.
1. The quality of the muon measurement has been one of the guiding design criteria for the ATLAS experiment.
2.. Muon spectrometer is the outer layer of ATLAS detector (average dimensions about
22 meters high and 44 meters long).
3. For the muon trajectory the determination of 3 points in the muon track are the minimum needed.
4. All together it lead us to the 5500 meters squared have to be covered by muon detectors or 400000 single drift tube detector, grouped in 1200 chambers.