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Alignment of the CMS tracker with LHC and cosmic ray data

Author(s)
Apyan, Aram; Barbieri, Richard Alexander; Bauer, Gerry P; Busza, Wit; Cali, Ivan Amos; Chan, M.; Di Matteo, Leonardo; Dutta, Valentina; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Gulhan, Doga Can; Klute, Markus; Lai, Y. S.; Lee, Y.-J.; Levin, A.; Luckey Jr, P David; Ma, Teng; Paus, Christoph M. E.; Ralph, Duncan Kelley; Roland, Christof E; Roland, Gunther M; Stephans, George S. F.; Stockli, Fabian; Sumorok, Konstanty C; Velicanu, Dragos Alexandru; Veverka, Jan; Wyslouch, Boleslaw; Yang, Ming; Yoon, A. S.; Zanetti, Marco; Wyslouch, Victoria; CMS Collaboration; ... Show more Show less
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Creative Commons Attribution 3.0 unported license https://creativecommons.org/licenses/by/3.0/
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Abstract
The central component of the CMS detector is the largest silicon tracker ever built. The precise alignment of this complex device is a formidable challenge, and only achievable with a significant extension of the technologies routinely used for tracking detectors in the past. This article describes the full-scale alignment procedure as it is used during LHC operations. Among the specific features of the method are the simultaneous determination of up to 200 000 alignment parameters with tracks, the measurement of individual sensor curvature parameters, the control of systematic misalignment effects, and the implementation of the whole procedure in a multi-processor environment for high execution speed. Overall, the achieved statistical accuracy on the module alignment is found to be significantly better than 10μm.
Date issued
2014-06
URI
https://hdl.handle.net/1721.1/121482
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Journal
Journal of Instrumentation
Publisher
IOP Publishing
Citation
Chatrchyan, S. et al. "Alignment of the CMS tracker with LHC and cosmic ray data." Journal of Instrumentation 9 (June 2014): P06009 © 2014 CERN for the benefit of the CMS collaboration
Version: Final published version
ISSN
1748-0221

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