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

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 μm resolution using a...

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Veröffentlicht in:	Journal of instrumentation 2017-04, Vol.12 (4), p.P04023-P04023
Hauptverfasser:	Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Flechl, M., Friedl, M., Frühwirth, R., Ghete, V.M., Hoch, M., Hartl, C., Hörmann, N., Hrubec, J., Jeitler, M., König, A., Krätschmer, I., Liko, D., Matsushita, T., Mikulec, I., Rabady, D., Rad, N., Rahbaran, B., Rohringer, H., Schieck, J., Strauss, J., Waltenberger, W., Wulz, C.-E., Dvornikov, O., Makarenko, V., Mossolov, V., Gonzalez, J. Suarez, Zykunov, V., Shumeiko, N., Alderweireldt, S., Wolf, E.A. De, Janssen, X., Lauwers, J., Klundert, M. Van De, Haevermaet, H. Van, Mechelen, P. Van, Remortel, N. Van, Spilbeeck, A. Van, Zeid, S. Abu, Blekman, F., D'Hondt, J., Daci, N., Bruyn, I. De, Deroover, K., Lowette, S., Moortgat, S., Moreels, L., Olbrechts, A., Python, Q., Skovpen, K., Tavernier, S., Doninck, W. Van, Mulders, P. Van, Parijs, I. Van, Brun, H., Clerbaux, B., Lentdecker, G. De, Delannoy, H., Fasanella, G., Favart, L., Goldouzian, R., Grebenyuk, A., Karapostoli, G., Lenzi, T., Léonard, A., Luetic, J., Maerschalk, T., Marinov, A., Randle-conde, A., Seva, T., Velde, C. Vander, Vanlaer, P., Vannerom, D., Yonamine, R., Zenoni, F., Zhang, F., Cimmino, A., Cornelis, T., Dobur, D., Fagot, A., Gul, M., Khvastunov, I., Poyraz, D., Salva, S., Schöfbeck, R., Tytgat, M., Driessche, W. Van, Yazgan, E., Zaganidis, N., Bakhshiansohi, H., Beluffi, C., Bondu, O.
Format:	Artikel
Sprache:	eng
Schlagworte:	Alignment Carbon fibers Composite structures Cosmic rays detector alignment and calibration methods (lasers, sources, particle-beams) Fiber composites High Energy Physics - Experiment INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY large detector systems for particle and astroparticle physics Particle tracking particle tracking detectors particle tracking detectors (Solid-state detectors) Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Stability Strip Temperature
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Beschreibung
Zusammenfassung:	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 μm 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 30μm. In addition, temperature variations were found to cause displacements of tracker structures of about 2μm°C, which largely revert to their initial positions when the temperature is restored to its original value.
ISSN:	1748-0221 1748-0221
DOI:	10.1088/1748-0221/12/04/P04023