Alignment of the CMS silicon tracker during commissioning with cosmic rays

Mondal, N. K. ; et., al (2010) Alignment of the CMS silicon tracker during commissioning with cosmic rays Journal of Instrumentation, 5 (3). T03009_1-T03009_24. ISSN 1748-0221

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Official URL: http://iopscience.iop.org/1748-0221/5/03/T03009

Related URL: http://dx.doi.org/10.1088/1748-0221/5/03/T03009

Abstract

The CMS silicon tracker, consisting of 1440 silicon pixel and 15 148 silicon strip detector modules, has been aligned using more than three million cosmic ray charged particles, with additional information from optical surveys. The positions of the modules were determined with respect to cosmic ray trajectories to an average precision of 3-4 microns RMS in the barrel and 3-14 microns RMS in the endcap in the most sensitive coordinate. The results have been validated by several studies, including laser beam cross-checks, track fit self-consistency, track residuals in overlapping module regions, and track parameter resolution, and are compared with predictions obtained from simulation. Correlated systematic effects have been investigated. The track parameter resolutions obtained with this alignment are close to the design performance.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics.
Keywords:Particle Tracking Detectors (solid-state Detectors); Large Detector Systems for Particle and Astroparticle Physics
ID Code:90098
Deposited On:04 May 2012 13:47
Last Modified:19 May 2016 04:25

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