CERN Accelerating science

ATLAS Note
Report number	ATL-MUON-2005-008 ; ATL-COM-MUON-2002-005 ; CERN-ATL-COM-MUON-2002-005
Title	First Results from the Cosmic-Ray Test-Facility at LMU Munich
Author(s)	Binder, M ; Dubbert, J ; Hertenberger, R ; Elmsheuser, J ; Kortner, O ; Rauscher, F ; Rykaczewski, M ; Sahr, O ; Schaile, A D ; Staude, A ; Steffens, H ; Stiller, W ; Zhuravlov, V ; Zupancic, Crtomir
Publication	2002
Imprint	2002
Number of pages	13
Note	revised version number 1 submitted on 2003-01-07 09:01:14
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	cosmic ray ; test ; test stand
Abstract	A cosmic-ray test-stand for MDT chambers has been installed at the University of Munich. Three BOS chambers stacked on top of each other were operated simultaneously. All chambers show proper operational behaviour: in all of their tubes the rate of accidental hits was small and the length of their drift-time spectra agreed within 1,6 $ns$ and better inside each triple layer of tubes. Tracks reconstructed in the uppermost and lowest chamber were used to measure the ATLAS z-coordinate of the anode wires and the distance of the tube layers in the chamber in the middle. Comparisons with the measurement of the x-ray tomograph show that both quantities can be determined with an accuracy of 10 $\mu m$ after a data-acquisition time of 20 hours.
Copyright/License	Preprint: (License: CC-BY-4.0)

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