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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents

ID: 544340.0, MPI für Physik / MPI für Physik
Development of Precision Drift Tube Detectors for Very High Background Rates at the Super-LHC
Authors:Dubbert, J.; Horvat, S.; Kroha, H.; Legger, F.; Kortner, O.; Richter, R.; Rauscher, F.
Place of Conference/Meeting:Honolulu (Hawaii)
(Start) Date of Conference/Meeting
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:The muon spectrometer of the ATLAS experiment at the Large Hadron
Collider (LHC) is instrumented with three layers of precision
tracking detectors each consisting of 6 or 8 layers of pressurized
aluminum drift tubes of 30 mm diameter. The magnetic field of the
spectrometer is generated by superconducting air-core toroid
magnets. Already at the LHC design luminosity of 10^{34} cm^2 s^{-1}, the ATLAS muon chambers have to
cope with unprecedentedly high neutron and gamma ray background
rates of up to 500 Hz/cm^2 in the inner and middle
chamber layers in the forward regions of the spectrometer. At a
high-luminosity upgrade of the LHC (S-LHC), the background rates are
expected to increase by an order of magnitude. The resulting high
occupancies lead to a significant deterioration of the muon
detection efficiency compromising the physics goals. The possibility
to improve the muon detection efficiency by reducing the diameter of
the drift tubes has been investigated. We report about the design
and test results of prototype drift-tube detectors with thin-walled
aluminum tubes of 15 mm diameter.
Classification / Thesaurus:ATLAS
Document Type:Conference-Paper
Communicated by:N.N.
Affiliations:MPI für Physik
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