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Title	The network of photodetectors and diode lasers of the CMS Link alignment system
Related title	The network of photodetectors and diode lasers of the CMS Link alignment system
Author(s)	Arce, P (Madrid, CIEMAT) ; Barcala, J M (Madrid, CIEMAT) ; Calvo, E (Madrid, CIEMAT) ; Ferrando, A (Madrid, CIEMAT) ; Josa, M I (Madrid, CIEMAT) ; Molinero, A (Madrid, CIEMAT) ; Navarrete, J (Madrid, CIEMAT) ; Oller, J C (Madrid, CIEMAT) ; Brochero, J (Cantabria U., Santander) ; Calderón, A (Cantabria U., Santander) ; Fernández, M G (Cantabria U., Santander) ; Gómez, G (Cantabria U., Santander) ; González-Sánchez, F J (Cantabria U., Santander) ; Martínez-Rivero, C (Cantabria U., Santander) ; Matorras, F (Cantabria U., Santander) ; Rodrigo, T (Cantabria U., Santander) ; Ruiz-Árbol, P (Cantabria U., Santander) ; Scodellaro, L (Cantabria U., Santander) ; Sobrón, M (Cantabria U., Santander) ; Vila, I (Cantabria U., Santander) ; Virto, A L (Cantabria U., Santander) ; Fernández, J (Oviedo U.) ; Raics, P (U. Debrecen, Inst. Phys.) ; Szabó, Zs (U. Debrecen, Inst. Phys.) ; Trócsnyi, Z (U. Debrecen, Inst. Phys.) ; Ujvári, B (U. Debrecen, Inst. Phys.) ; Zilizi, Gy (U. Debrecen, Inst. Phys.) ; Béni, N (Debrecen, Inst. Nucl. Res.) ; Christian, G (Debrecen, Inst. Nucl. Res.) ; Imrek, J (Debrecen, Inst. Nucl. Res.) ; Molnar, J (Debrecen, Inst. Nucl. Res.) ; Novak, D (Debrecen, Inst. Nucl. Res.) ; Pálinkás, J (Debrecen, Inst. Nucl. Res.) ; Székely, G (Debrecen, Inst. Nucl. Res.) ; Szillási, Z (Debrecen, Inst. Nucl. Res.) ; Bencze, G L (Wigner RCP, Budapest) ; Vestergombi, G (Wigner RCP, Budapest) ; Benettoni, M (INFN, Padua ; Padua U.) ; Gasparini, F (INFN, Padua ; Padua U.) ; Montecassiano, F (INFN, Padua ; Padua U.) ; Rampazzo, M (INFN, Padua ; Padua U.) ; Zago, M (INFN, Padua ; Padua U.) ; Benvenuti, A (INFN, Bologna ; U. Bologna, DIFA) ; Reithler, H (Aachen, Tech. Hochsch.) ; Jiang, C (Beijing, Inst. High Energy Phys.)
Publication	2018
Number of pages	23
In:	Nucl. Instrum. Methods Phys. Res., A 896 (2018) 1-23
DOI	10.1016/j.nima.2018.04.004
Subject category	Detectors and Experimental Techniques ; Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	The central feature of the CMS Link alignment system is a network of Amorphous Silicon Position Detectors distributed throughout the muon spectrometer that are connected by multiple laser lines. The data collected during the years from 2008 to 2015 is presented confirming an outstanding performance of the photo sensors during more than seven years of operation. Details of the photo sensor readout of the laser signals are presented. The mechanical motions of the CMS detector are monitored using these photosensors and good agreement with distance sensors is obtained.
Copyright/License	The Authors (License: CC-BY-NC-ND 4.0)

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