Interstrip capacitances of the readout board used in large triple-GEM detectors for the CMS Muon Upgrade

Abbas, M; Abbrescia, M; Abdalla, H; Abdelalim, A; Abuzeid, S; Agapitos, A; Ahmad, A; Ahmed, A; Ahmed, W; Aime, C; Aruta, C; Asghar, I; Aspell, P; Avila, C; Babbar, J; Ban, Y; Band, R; Bansal, S; Benussi, L; Bhatnagar, V; Bianco, M; Bianco, S; Black, K; Borgonovi, L; Bouhali, O; Braghieri, A; Braibant, S; Butalla, S; Calzaferri, S; Caponero, M; Cassese, F; Cavallo, N; Chauhan, S; Colaleo, A; Collins, J; Garcia, Ac; Dalchenko, M; De Iorio, A; De Lentdecker, G; Olio, Dd; De Robertis, G; Dharmaratna, W; Dildick, S; Dorney, B; Erbacher, R; Fabozzi, F; Fallavollita, F; Ferraro, A; Fiorina, D; Fontanesi, E; Franco, M; Galloni, C; Giacomelli, P; Gigli, S; Gilmore, J; Gola, M; Gruchala, M; Gutierrez, A; Hadjiiska, R; Hakkarainen, T; Hauser, J; Hoepfner, K; Hohlmann, M; Hoorani, H; Huang, T; Iaydjiev, P; Irshad, A; Iorio, A; Ivone, F; Jaramillo, J; Jeong, D; Jha, V; Juodagalvis, A; Juska, E; Kailasapathy, B; Kamon, T; Karchin, P; Kaur, A; Kaur, H; Keller, H; Kim, H; Kim, J; Kumar, A; Kumar, S; Kumawat, H; Lacalamita, N; Lee, Jsh; Levin, A; Li, Q; Licciulli, F; Lista, L; Liyanage, K; Loddo, F; Lohan, M; Luhach, M; Maggi, M; Maghrbi, Y; Majumdar, N; Malagalage, K; Malhotra, S; Martiradonna, S; Mccoll, N; Mclean, C; Merlin, J; Misheva, M; Mishra, D; Mocellin, G; Moureaux, L; Muhammad, A; Muhammad, S; Mukhopadhyay, S; Naimuddin, M; Netrakanti, P; Nuzzo, S; Oliveira, R; Pant, L; Paolucci, P; Park, Ic; Passamonti, L; Passeggio, G; Peck, A; Perera, N; Petre, L; Petrow, H; Piccolo, D; Pierluigi, D; Raffone, G; Rahmani, M; Ramirez, F; Ranieri, A; Rashevski, G; Ressegotti, M; Riccardi, C; Rodozov, M; Romano, E; Roskas, C; Rossi, B; Rout, P; Roy, D; Ruiz, Jd; Russo, A; Safonov, A; Saltzberg, D; Saviano, G; Shah, A; Sharma, A; Sharma, R; Shopova, M; Simone, F; Singh, J; Soldani, E; Sonnadara, U; Starling, E; Stone, B; Sturdy, J; Sultanov, G; Szillasi, Z; Teague, D; Teyssier, D; Tuuva, T; Tytgat, M; Vai, I; Vanegas, N; Venditti, R; Verwilligen, P; Vetens, W; Virdi, A; Vitulo, P; Wajid, A; Wang, D; Wang, K; Watson, I; Weatherwax, J; Wickramage, N; Wickramarathna, Ddc; Yang, Y; Yang, U; Yongho, J; Yoon, I; You, Z; Yu, I; Zaleski, S

doi:10.1088/1748-0221/15/12/P12019

We present analytical calculations, Finite Element Analysis modelling, and physical measurements of the interstrip capacitances for different potential strip geometries and dimensions of the readout boards for the GE2/1 triple-Gas Electron Multiplier detector in the CMS muon system upgrade. The main goal of the study is to find configurations that minimize the interstrip capacitances and consequently maximize the signal-to-noise ratio for the detector. We find agreement at the 1.5-4.8% level between the two methods of calculations and on the average at the 177c level between calculations and measurements. A configuration with halved strip lengths and doubled strip widths results in a measured 27-29% reduction over the original configuration while leaving the total number of strips unchanged. We have now adopted this design modification for all eight module types of the GE2/1 detector and will produce the final detector with this new strip design.