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

Abstract: The CMS tracker consists of 206 m2 of silicon strip sensors assembled on carbon fibre composite structures and is designed for operation in the temperature range from -25 to +25°C. The mechanical stability of tracker components during physics operation was monitored with a few ?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?m. In addition, temperature variations were found to cause displacements of tracker structures of about 2?m°C, which largely revert to their initial positions when the temperature is restored to its original value.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Journal of Instrumentation, Vol. 12, Iss. 4, 2017, Art. Num. P04023

Editorial: Institute of Physics

 Fecha de publicación: 01/04/2017

Nº de páginas: 39

Tipo de publicación: Artículo de Revista

 DOI: 10.1088/1748-0221/12/04/P04023

ISSN: 1748-0221

Url de la publicación: https://doi.org/10.1088/1748-0221/12/04/P04023