New high-precision drift-tube detectors for the ATLAS muon spectrometer

Small-diameter muon drift tube (sMDT) detectors have been developed for upgrades of the ATLAS muon spectrometer. With a tube diameter of 15 mm, they provide an about an order of magnitude higher rate capability than the present ATLAS muon tracking detectors, the MDT chambers with 30 mm tube diameter...

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Bibliographic Details
Published in:Journal of instrumentation 2017-06, Vol.12 (6), p.C06007-C06007
Main Authors: Kroha, H., Fakhrutdinov, R., Kozhin, A.
Format: Article
Language:English
Subjects:
Chambers
Construction methods
Detectors
Drift tubes
Luminosity
Mass production
Muons
Sensors
Shape optimization
Shutdowns
Wire
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Summary:Small-diameter muon drift tube (sMDT) detectors have been developed for upgrades of the ATLAS muon spectrometer. With a tube diameter of 15 mm, they provide an about an order of magnitude higher rate capability than the present ATLAS muon tracking detectors, the MDT chambers with 30 mm tube diameter. The drift-tube design and the construction methods have been optimised for mass production and allow for complex shapes required for maximising the acceptance. A record sense wire positioning accuracy of 5μm has been achieved with the new design. In the serial production, the wire positioning accuracy is routinely better than 10μm. 14 new sMDT chambers are already operational in ATLAS, further 16 are under construction for installation in the 2019–2020 LHC shutdown. For the upgrade of the barrel muon spectrometer for High-Luminosity LHC, 96 sMDT chambers will be contructed between 2020 and 2024.
ISSN:1748-0221
1748-0221
DOI:10.1088/1748-0221/12/06/C06007