Quality control for the first large areas of triple-GEM chambers for the CMS endcaps
RWTH Aachen University, III Physikalisches Institut A, Aachen, Germany
2 INFN Bari and University of Bari, Bari, Italy
3 Peking University, Beijing, China
4 INFN Bologna and University of Bologna, Bologna, Italy
5 Universite Libre de Bruxelles, Brussels, Belgium
6 National Institute of Science Education and Research, Bhubaneswar
7 Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, Hungary
8 Academy of Scientific Research and Technology - Egyptian Network of High Energy Physics, ASRT-ENHEP, Cairo, Egypt
9 Texas A&M University, College Station, U.S.A.
10 Institute for Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), Debrecen, Hungary
11 University of Delhi, Delhi, India
12 Wayne State University, Detroit, U.S.A
13 Texas A&M University at Qatar, Doha, Qatar
14 Laboratori Nazionali di Frascati - INFN, Frascati, Italy
15 University of Florida, Gainesville, U.S.A.
16 Petersburg Nuclear Physics Institute, Gatchina, Russia
17 CERN, Geneva, Switzerland
18 Ghent University, Dept. of Physics and Astronomy, Ghent, Belgium
19 National Center for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan
20 Saha Institute of Nuclear Physics, Kolkata, India
21 Lappeenranta University of Technology, Lappeenranta, Finland
22 University of California, Los Angeles, U.S.A.
23 Florida Institute of Technology, Melbourne, U.S.A.
24 Bhabha Atomic Research Centre, Mumbai, India
25 INFN Napoli, Napoli, Italy
26 INFN Pavia and University of Pavia, Pavia, Italy
27 IRFU CEA-Saclay, Saclay, France
28 Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria
29 Sofia University, Sofia, Bulgaria
30 Korea University, Seoul, Korea
31 Seoul National University, Seoul, Korea
32 University of Seoul, Seoul, Korea
33 Institut Pluridisciplinaire - Hubert Curien (IPHC), Strasbourg, France
a Corresponding author; e-mail: Michael.Tytgat@UGent.be
Published online: 21 February 2018
The CMS Collaboration plans to equip the very forward muon system with triple-GEM detectors that can withstand the environment of the High-Luminosity LHC. This project is at the final stages of R&D and moving to production. An unprecedented large area of several 100 m2 are to be instrumented with GEM detectors which will be produced in six different sites around the world. A common construction and quality control procedure is required to ensure the performance of each detector. The quality control steps will include optical inspection, cleaning and baking of all materials and parts used to build the detector, leakage current tests of the GEM foils, high voltage tests, gas leak tests of the chambers and monitoring pressure drop vs. time, gain calibration to know the optimal operation region of the detector, gain uniformity tests, and studying the efficiency, noise and tracking performance of the detectors in a cosmic stand using scintillators.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).