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Detector Seminar
Alignment of the ATLAS Muon Spectrometer
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Europe/Zurich
40/S2-B01 - Salle Bohr (CERN)
Description
Abstract:
The muon spectrometer of the ATLAS detector at the LHC consists of 1182 muon chambers for precision track measurements, arranged in three concentric cylinders in the barrel region, and in four wheels in each of the two endcaps. The chambers are located between 5m and 22m from the interaction point, and typical muon tracks are detected in three about equally spaced chambers.
Muon chambers are equipped with a novel and complex high-precision optical alignment system to monitor their positions and deformations during ATLAS data-taking with a challenging 40mu accuracy, which is ultimately required for reconstructing high-momentum final-state muons with the desired resolution of 10% at 1TeV.
I will introduce the alignment system design, hardware, andsoftware. The installation and commissioning of the full system of more than 12,000 sensors in the ATLAS cavern has been completed in 2008, and performance checks using cosmic muon tracks recorded in 2008 and 2009 will be presented.
Finally, I will give an outlook on methods to combine sensor and track measurements to obtain the best possible alignment.
Organizer: Hans Postema PH/CMX