A Cosmic Ray Measurement Facility for ATLAS Muon Chambers

Details A Cosmic Ray Measurement Facility for ATLAS Muon Chambers A Cosmic Ray Measurement Facility for ATLAS Muon Chambers

2003-07-30

arxiv.org/abs/physics/0307147v1

Physics

Instrumentation and Detectors

14+1 pages, 11 figures, contributed paper to the EPS2003 conference, Aachen

Scientific paper

Monitored Drift Tube (MDT) chambers will constitute the large majority of precision detectors in the Muon Spectrometer of the ATLAS experiment at the Large Hadron Collider at CERN. For commissioning and calibration of MDT chambers, a Cosmic Ray Measurement Facility is in operation at Munich University. The objectives of this facility are to test the chambers and on-chamber electronics, to map the positions of the anode wires within the chambers with the precision needed for standalone muon momentum measurement in ATLAS, and to gain experience in the operation of the chambers and on-line calibration procedures. Until the start of muon chamber installation in ATLAS, 88 chambers built at the Max Planck Institute for Physics in Munich have to be commissioned and calibrated. With a data taking period of one day individual wire positions can be measured with an accuracy of 8.3 micrometers in the chamber plane and 27 micrometers in the direction perpendicular to that plane.

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