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Mechanical stability of the CMS strip tracker measured with a laser alignment system

Title
Mechanical stability of the CMS strip tracker measured with a laser alignment system
Author
김태정
Keywords
Detector alignment and calibration methods (lasers, sources, particle-beams); Large detector systems for particle and astroparticle physics; Particle tracking detectors; Particle tracking detectors (Solid-state detectors)
Issue Date
2017-04
Publisher
IOP PUBLISHING LTD
Citation
JOURNAL OF INSTRUMENTATION, v. 12, Article no. P04023
Abstract
The CMS tracker consists of 206m(2) of silicon strip sensors assembled on carbon fibre composite structures and is designed for operation in the temperature range from -25 to + 25 degrees C. The mechanical stability of tracker components during physics operation was monitored with a few mu m resolution using a dedicated laser alignment system as well as particle tracks from cosmic rays and hadron-hadron collisions. During the LHC operational period of 2011-2013 at stable temperatures, the components of the tracker were observed to experience relative movements of less than 30 mu m. In addition, temperature variations were found to cause displacements of tracker structures of about 2 mu m/degrees C, which largely revert to their initial positions when the temperature is restored to its original value.
URI
https://iopscience.iop.org/article/10.1088/1748-0221/12/04/P04023https://repository.hanyang.ac.kr/handle/20.500.11754/113632
ISSN
1748-0221
DOI
10.1088/1748-0221/12/04/P04023
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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