Alignment of the CMS tracker with LHC and cosmic ray data
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Author / Producer
Date
2014-06
Publication Type
Journal Article
ETH Bibliography
yes
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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.
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published
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Journal / series
Volume
9
Pages / Article No.
Publisher
IOP Publishing
Event
Edition / version
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Date collected
Date created
Subject
Particle tracking detectors; Detector alignment and calibration methods (lasers, sources, particle-beams); Large detector systems for particle and astroparticle physics
Organisational unit
03381 - Pauss, Felicitas (emeritus)
03593 - Dissertori, Günther / Dissertori, Günther
03904 - Wallny, Rainer / Wallny, Rainer
08803 - Grab, Christoph (Tit.Prof.)