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Article
Title Construction and Test of a Prototype Chamber for the Upgrade of the ATLAS Muon Spectrometer
Author(s) Bittner, B (Munich, Max Planck Inst.) ; Dubbert, J (Munich, Max Planck Inst.) ; Kroha, H (Munich, Max Planck Inst.) ; Loeben, J v (Munich, Max Planck Inst.) ; Schwegler, P (Munich, Max Planck Inst.)
Publication 2012
Number of pages 7
In: Phys. Procedia 37 (2012) 515-521
In: 2nd International Conference on Technology and Instrumentation in Particle Physics, Chicago, IL, USA, 9 - 14 Jun 2011, pp.515-521
DOI 10.1016/j.phpro.2012.02.398
Subject category Detectors and Experimental Techniques
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Abstract Monitored drift tube chambers are used as precision tracking detectors in the muon spectrometer of the ATLAS experiment at the LHC at CERN. These chambers provide a spatial resolution of 35 μm and a tracking efficiency of close to 100% up to background rates of 0.5 kHz/cm 2 , the former being limited at higher rates mainly due to space-charge effects and the latter due to the maximum drift time of 700 ns. For LHC upgrades, a faster drift tube chamber has been developed, using drift tubes with a diameter of 15 mm instead of 30 mm. The increased channel density and shorter drift time of about 200 ns raise the rate capability to about 10 kHz/cm 2 , while retaining the spatial resolution. A prototype chamber with trapezoidal shape consisting of 2 x 8 layers of 15 mm diameter drift tubes with an active surface of 0.8 m 2 has been constructed. The prototype chamber has been tested at CERN with a 180 GeV muon beam at a SPS beam line and with cosmic ray muons at the Gamma Irradiation Facility (GIF) at high γ radiation rates.
Copyright/License publication: © 2012-2025 Elsevier (License: CC-BY-NC-ND-3.0)

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