Alignment of the CMS tracker with LHC and cosmic ray data

The CMS collaboration

Research output: Contribution to journalArticle

18 Citations (Scopus)

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.

Original languageEnglish
Article numberP06009
JournalJournal of Instrumentation
Volume9
Issue number6
DOIs
Publication statusPublished - 1 Jun 2014

Fingerprint

Cosmic rays
Cosmic Rays
cosmic rays
rays
Alignment
alignment
Detector
Detectors
Misalignment
detectors
Multiprocessor
misalignment
central processing units
Silicon
modules
Curvature
curvature
high speed
Module
Sensor

Keywords

  • Detector alignment and calibration methods (lasers, sources, particle-beams)
  • Large detector systems for particle and astroparticle physics
  • Particle tracking detectors

ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics

Cite this

Alignment of the CMS tracker with LHC and cosmic ray data. / The CMS collaboration.

In: Journal of Instrumentation, Vol. 9, No. 6, P06009, 01.06.2014.

Research output: Contribution to journalArticle

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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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AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Bergauer, T.

AU - Dragicevic, M.

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AU - Shumeiko, N.

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AU - Alderweireldt, S.

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KW - Particle tracking detectors

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