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

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

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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 17% 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.

Original languageEnglish
Article numberP12019
JournalJournal of Instrumentation
Issue number12
StatePublished - Dec 2020


  • Detector modelling and simulations II (electric fields, charge transport, multiplication and induction, pulse formation, electron emission, etc)
  • Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc)


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