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Performance of a triple-GEM demonstrator in pp collisions at the CMS detector
M. Abbas14, M. Abbrescia19, H. Abdalla8,10, A. Abdelalim8,11, S. AbuZeid8,9, A. Agapitos4, A. Ahmad30, A. Ahmed17, W. Ahmed30, C. Aimè23, C. Aruta19, I. Asghar30, P. Aspell34, C. Avila6, J. Babbar16, Y. Ban4, R. Band36, S. Bansal16, L. Benussi21, V. Bhatnagar16, M. Bianco34, S. Bianco21, K. Black39, L. Borgonovi20, O. Bouhali35, A. Braghieri23, S. Braibant20, S. Butalla40, S. Calzaferri23, M. Caponero21, J. Carlson38, F. Cassese22, N. Cavallo22, S.S. Chauhan16, S. Colafranceschi21, A. Colaleo19, A. Conde Garcia34, M. Dalchenko35, A. De Iorio22, G. De Lentdecker1, D. Dell Olio19, G. De Robertis19, W. Dharmaratna33, S. Dildick35, B. Dorney1, R. Erbacher36, F. Fabozzi22, F. Fallavollita34, A. Ferraro23, D. Fiorina23, E. Fontanesi20, M. Franco19, C. Galloni39, P. Giacomelli20, S. Gigli23, J. Gilmore35, M. Gola17, M. Gruchala34, A. Gutierrez37, R. Hadjiiska3, T. Hakkarainen12, J. Hauser38, K. Hoepfner13, M. Hohlmann40, H. Hoorani30, T. Huang35, P. Iaydjiev3, A. Irshad1, A. Iorio22, F. Ivone13, W. Jang27, J. Jaramillo7, A. Juodagalvis29, E. Juska35, B. Kailasapathy31,32, T. Kamon35, Y. Kang27, P. Karchin37, A. Kaur16, H. Kaur16, H. Keller13, H. Kim35, J. Kim26, S. Kim27, B. Ko27, A. Kumar17, S. Kumar16, N. Lacalamita19, J.S.H. Lee27, A. Levin4, Q. Li4, F. Licciulli19, L. Lista22, K. Liyanage33, F. Loddo19, M. Luhach16, M. Maggi19, Y. Maghrbi28, N. Majumdar18, K. Malagalage31, S. Malhotra35, S. Martiradonna19, C. McLean36, J. Merlin19, M. Misheva3, G. Mocellin13, L. Moureaux1, A. Muhammad30, S. Muhammad30, S. Mukhopadhyay18, M. Naimuddin17, S. Nuzzo19, R. Oliveira34, P. Paolucci22, I.C. Park27, L. Passamonti21, G. Passeggio22, A. Peck38, A. Pellecchia19, N. Perera33, L. Petre1, H. Petrow12, D. Piccolo21, D. Pierluigi21, G. Raffone21, M. Rahmani40, F. Ramirez7, A. Ranieri19, G. Rashevski3, B. Regnery36, M. Ressegotti23, C. Riccardi23, M. Rodozov3, E. Romano23, C. Roskas2, B. Rossi22, P. Rout18, J.D. Ruiz7, A. Russo21, A. Safonov35, A.K. Sahota16, D. Saltzberg38, G. Saviano21, A. Shah17, A. Sharma34, R. Sharma17, T. Sheokand16, M. Shopova3, F.M. Simone19, J. Singh16, U. Sonnadara31, E. Starling1, B. Stone38, J. Sturdy37, G. Sultanov3, Z. Szillasi15, D. Teague39, D. Teyssier15, T. Tuuva12, M. Tytgat2, I. Vai24, N. Vanegas7, R. Venditti19, P. Verwilligen19, W. Vetens39, A.K. Virdi16, P. Vitulo23, A. Wajid30, D. Wang4, K. Wang4, I.J. Watson27, N. Wickramage33, D.D.C. Wickramarathna31, S. Yang27, U. Yang26, Y. Yang1, J. Yongho25, I. Yoon26, Z. You5, I. Yu25 and S. Zaleski13
After the Phase-2 high-luminosity upgrade to the Large Hadron Collider (LHC), the collision rate and therefore the background rate will significantly increase, particularly in the high η region. To improve both the tracking and triggering of muons, the Compact Muon Solenoid (CMS) Collaboration plans to install triple-layer Gas Electron Multiplier (GEM) detectors in the CMS muon endcaps. Demonstrator GEM detectors were installed in CMS during 2017 to gain operational experience and perform a preliminary investigation of detector performance. We present the results of triple-GEM detector performance studies performed in situ during normal CMS and LHC operations in 2018. The distribution of cluster size and the efficiency to reconstruct high pT muons in proton-proton collisions are presented as well as the measurement of the environmental background
rate to produce hits in the GEM detector.
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