Title
Aligning the CMS muon chambers with the muon alignment system during an extended cosmic ray run Aligning the CMS muon chambers with the muon alignment system during an extended cosmic ray run
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Bristol :Institute of Physics ,
Subject
Physics
Source (journal)
Journal of instrumentation. - Bristol, 2006, currens
Volume/pages
5(2010) :3 , p. T03019,1-T03019,34
ISSN
1748-0221
Article Reference
T03019
ISI
000280524100014
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The alignment system for the muon spectrometer of the CMS detector comprises three independent subsystems of optical and analog position sensors. It aligns muon chambers with respect to each other and to the central silicon tracker. System commissioning at full magnetic field began in 2008 during an extended cosmic ray run. The system succeeded in tracking muon detector movements of up to 18 mm and rotations of several milliradians under magnetic forces. Depending on coordinate and subsystem, the system achieved chamber alignment precisions of 140350 μm and 30200 μrad, close to the precision requirements of the experiment. Systematic errors on absolute positions are estimated to be 340590 μm based on comparisons with independent photogrammetry measurements.
E-info
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Full text (open access)
https://repository.uantwerpen.be/docman/irua/a943f4/83213.pdf
Handle