Precision Drift Chambers for the ATLAS Muon Spectrometer Susanne Mohrdieck Max-Planck-Institut f. Physik, Munich for the ATLAS Muon Collaboration Abstracts: 344,350,6 International Europhysics Conference on High-Energy Physics 17.-23.7.2003 Outline: Introduction - ATLAS and the muon spectrometer Precision chamber production Monitoring and measurement of chamber quality/accuracy Performance test of precision chambers under LHC operating conditions
14
Embed
Precision Drift Chambers for the ATLAS Muon Spectrometer
Abstracts: 344,350,646. Precision Drift Chambers for the ATLAS Muon Spectrometer. Susanne Mohrdieck Max-Planck-Institut f. Physik, Munich for the ATLAS Muon Collaboration. International Europhysics Conference on High-Energy Physics 17.-23.7.2003. Outline: - PowerPoint PPT Presentation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Precision Drift Chambers for the ATLAS Muon Spectrometer
Susanne MohrdieckMax-Planck-Institut f. Physik, Munich
for the ATLAS Muon Collaboration
Abstracts: 344,350,646
International Europhysics Conference on High-Energy Physics
17.-23.7.2003
Outline: Introduction - ATLAS and the muon spectrometer Precision chamber production Monitoring and measurement of chamber quality/accuracy Performance test of precision chambers under LHC operating conditions
The ATLAS Muon SpectrometerATLAS at LHC: multi-purpose detector to search for Higgs and new physics
Muon Spectrometer:
• toroidal magnetic field: <B> = 0.4 T high pt-resolution independent of the polar angle
• size defined by large lever arm to allow high stand-alone precision
• air-core coils to minimise the multiple scattering
• 3 detector stations- cylindrical in barrel- wheels in end caps
• coverage: || < 2.7
used technologies:• fast trigger chambers: TGC, RPC• high resolution tracking
detectors: MDT, CSC
Performance
goal: high stand-alone µ-momentum resolution of 2-10% !
chamber resolution: 50 µm monitoring of high mechanical precision during production
elaborate optical alignment system to monitor chamber deformations and displacements
see talk by C.Amelung in this talk
at 1TeV: = 10% sagitta = 500 µm
Monitored Drift Tube Chambers (MDT)
End Cap
Barrel• 6 / 8 drift tube layers, arranged in 2 multilayers glued to a spacer frame• length: 1 – 6 m, width: 1 – 2 m• optical system to monitor chamber deformations
• gas: Ar:CO2 (93:7) to prevent aging, 3 bar
• chamber resolution: 50 µm single tube resolution: 100 µm required wire position accuracy: 20 µm
Status of MDT Production
production at 13 sites in 7 countries:• assembly layer by layer using precision table with precise ‚combs‘
• on-line monitoring of temperature and mechanical movements