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) |