CERN Accelerating science

Article
Title	Impact of magnetic field on the stability of the CMS GE1/1 GEM detector operation
Author(s)	Abbas, M (KIT, Karlsruhe) ; Abbott, S (UC, Davis) ; Abbrescia, M (Bari U. ; INFN, Bari) ; Abdalla, H (Alexandria U. ; American U., Cairo) ; Abdelalim, A (Alexandria U. ; Zewail City Sci. Technol., Giza) ; AbuZeid, S (Ain Shams U., Cairo ; INFN, Pavia) ; Aebi, D (Texas A-M) ; Agapitos, A (Peking U.) ; Ahmad, A (NCP, Islamabad) ; Ahmed, A (Delhi Tech. U.) ; Ahmed, W (NCP, Islamabad) ; Aimè, C (INFN, Pavia) ; Akhter, T (Texas A-M) ; Alsufyani, B (Florida Inst. Tech.) ; Aruta, C (Bari U. ; INFN, Bari) ; Asghar, I (NCP, Islamabad) ; Aspell, P (CERN) ; Avila, C (Andes U., Bogota) ; Babbar, J (Panjab U., Chandigarh) ; Ban, Y (Peking U.) ; Band, R (UC, Davis) ; Bansal, S (Panjab U., Chandigarh) ; Benussi, L (Frascati) ; Bhatnagar, V (Panjab U., Chandigarh) ; Bianco, M (CERN) ; Bianco, S (Frascati) ; Black, K (Wisconsin U., Madison) ; Borgonovi, L (Bologna U. ; INFN, Bologna) ; Bouhali, O (Texas A-M) ; Braghieri, A (INFN, Pavia) ; Braibant, S (Bologna U. ; INFN, Bologna) ; Butalla, S (Florida Inst. Tech.) ; Cagnotta, A (Naples U. ; INFN, Naples) ; Calzaferri, S (INFN, Pavia) ; Campagnola, R (Frascati) ; Caponero, M (Frascati) ; Carlson, J (UCLA) ; Cassese, F (Naples U. ; INFN, Naples) ; Cavallo, N (Naples U. ; INFN, Naples) ; Chauhan, S S (Panjab U., Chandigarh) ; Choudhary, B (Delhi Tech. U.) ; Colafranceschi, S (Frascati) ; Colaleo, A (Bari U. ; INFN, Bari) ; Conde Garcia, A (CERN) ; Datta, A (UCLA) ; De Iorio, A (Naples U. ; INFN, Naples) ; De Lentdecker, G (Brussels U.) ; Dell Olio, D (Bari U. ; INFN, Bari) ; De Robertis, G (Bari U. ; INFN, Bari) ; Dharmaratna, W (Colombo U.) ; Elkafrawy, T (Florida Inst. Tech.) ; Erbacher, R (UC, Davis) ; Everaerts, P (Wisconsin U., Madison) ; Fabozzi, F (Naples U. ; INFN, Naples) ; Fallavollita, F (CERN) ; Fiorina, D (INFN, Pavia) ; Franco, M (Bari U. ; INFN, Bari) ; Galloni, C (Wisconsin U., Madison) ; Giacomelli, P (Bologna U. ; INFN, Bologna) ; Gigli, S (INFN, Pavia) ; Gilmore, J (Texas A-M) ; Gola, M (Delhi Tech. U.) ; Gutierrez, A (Wayne State U.) ; Hadjiiska, R (Sofiya, Inst. Nucl. Res.) ; Hoepfner, K (Aachen, Tech. Hochsch.) ; Hohlmann, M (Florida Inst. Tech.) ; Hong, Y (Gent U.) ; Hoorani, H (NCP, Islamabad) ; Huang, T (Texas A-M) ; Iaydjiev, P (Sofiya, Inst. Nucl. Res.) ; Irshad, A (Brussels U.) ; Iorio, A (Naples U. ; INFN, Naples) ; Ivone, F (Aachen, Tech. Hochsch.) ; Jang, W (Korea U.) ; Jaramillo, J (Antioquia U.) ; Jeong, Y (Sungkyunkwan U.) ; Juska, E (Texas A-M) ; Kailasapathy, B (NCP, Islamabad ; Colombo U.) ; Kamon, T (Texas A-M) ; Kang, Y (Korea U.) ; Karchin, P (Wayne State U.) ; Kaur, A (Panjab U., Chandigarh) ; Kaur, H (Delhi Tech. U.) ; Keller, H (Aachen, Tech. Hochsch.) ; Kim, H (Texas A-M) ; Kim, J (Seoul Natl. U.) ; Kim, M (Sungkyunkwan U.) ; Kim, S (Korea U.) ; Ko, B (Korea U.) ; Kumar, A (Delhi Tech. U.) ; Kumar, S (Panjab U., Chandigarh) ; Lacalamita, N (Bari U. ; INFN, Bari) ; Lee, J S H (Korea U.) ; Levin, A (Peking U.) ; Li, Q (Peking U.) ; Licciulli, F (Bari U. ; INFN, Bari) ; Lista, L (Naples U. ; INFN, Naples) ; Liyanage, K (Colombo U.) ; Loddo, F (Bari U. ; INFN, Bari) ; Luhach, M (Panjab U., Chandigarh) ; Maggi, M (Bari U. ; INFN, Bari) ; Maghrbi, Y (AUM, Kuwait) ; Majumdar, N (Saha Inst.) ; Malagalage, K (Colombo U.) ; Martiradonna, S (Bari U. ; INFN, Bari) ; Merlin, J (Hanyang U.) ; Misheva, M (Sofiya, Inst. Nucl. Res.) ; Mocellin, G (UC, Davis) ; Moureaux, L (Brussels U.) ; Muhammad, A (NCP, Islamabad) ; Muhammad, S (NCP, Islamabad) ; Mukhopadhyay, S (Saha Inst.) ; Naimuddin, M (Delhi Tech. U.) ; Nuzzo, S (Bari U. ; INFN, Bari) ; Oliveira, R (CERN) ; Paolucci, P (Naples U. ; INFN, Naples) ; Park, I C (Korea U.) ; Passamonti, L (Frascati) ; Passeggio, G (Naples U. ; INFN, Naples) ; Peck, A (Wayne State U.) ; Pellecchia, A (Bari U. ; INFN, Bari) ; Perera, N (Colombo U.) ; Petre, L (Brussels U.) ; Piccolo, D (Frascati) ; Pierluigi, D (Frascati) ; Radogna, R (Bari U. ; INFN, Bari) ; Raffone, G (Frascati) ; Ramirez, F (Antioquia U.) ; Ranieri, A (Bari U. ; INFN, Bari) ; Rashevski, G (Sofiya, Inst. Nucl. Res.) ; Rathjens, D (Texas A-M) ; Regnery, B (UC, Davis) ; Rendon, C (Gent U.) ; Riccardi, C (INFN, Pavia) ; Rossi, B (Naples U. ; INFN, Naples) ; Rout, P (Saha Inst.) ; Ruiz, J D (Antioquia U.) ; Russo, A (Frascati) ; Safonov, A (Texas A-M) ; Sahota, A K (Panjab U., Chandigarh) ; Saltzberg, D (UCLA) ; Saviano, G (Frascati) ; Shah, A (Delhi Tech. U.) ; Sharma, A (CERN) ; Sharma, R (Delhi Tech. U.) ; Sheokand, T (Panjab U., Chandigarh) ; Shopova, M (Sofiya, Inst. Nucl. Res.) ; Simone, F (Bari U. ; INFN, Bari) ; Singh, J (Panjab U., Chandigarh) ; Sonnadara, U (Colombo U.) ; Sturdy, J (Wayne State U.) ; Sultanov, G (Sofiya, Inst. Nucl. Res.) ; Szillasi, Z (KLTE-ATOMKI) ; Teague, D (Wisconsin U., Madison) ; Teyssier, D (KLTE-ATOMKI) ; Tytgat, M (Vrije U., Brussels ; Gent U.) ; Vai, I (INFN, Pavia) ; Vanegas, N (Antioquia U.) ; Venditti, R (Bari U. ; INFN, Bari) ; Verwilligen, P (Bari U. ; INFN, Bari) ; Vetens, W (Wisconsin U., Madison) ; Virdi, A K (Panjab U., Chandigarh) ; Vitulo, P (INFN, Pavia) ; Wajid, A (NCP, Islamabad) ; Wang, D (Peking U.) ; Wang, K (Peking U.) ; Watson, I J (Korea U.) ; Wickramage, N (Colombo U.) ; Wickramarathna, D D C (Colombo U.) ; Yanes, E (Florida Inst. Tech.) ; Yang, S (Korea U.) ; Yang, U (Seoul Natl. U.) ; Yang, Y (Brussels U.) ; Yoon, I (Seoul Natl. U.) ; You, Z (Zhongshan U.) ; Yu, I (Sungkyunkwan U.) ; Zaleski, S (Aachen, Tech. Hochsch.)
Publication	2023
Number of pages	24
In:	JINST 18 (2023) P11029
DOI	10.1088/1748-0221/18/11/P11029
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	The Gas Electron Multiplier (GEM) detectors of the GE1/1 station of the CMS experiment have been operated in the CMS magnetic field for the first time on the 7$^{th}$ of October 2021. During the magnetic field ramps, several discharge phenomena were observed, leading to instability in the GEM High Voltage (HV) power system. In order to reproduce the behavior, it was decided to conduct a dedicated test at the CERN North Area with the Goliath magnet, using four GE1/1 spare chambers. The test consisted in studying the characteristics of discharge events that occurred in different detector configurations and external conditions. Multiple magnetic field ramps were performed in sequence: patterns in the evolution of the discharge rates were observed with these data. The goal of this test is the understanding of the experimental conditions inducing discharges and short circuits in a GEM foil.The results of this test lead to the development of procedure for the optimal operation and performance of GEM detectors in the CMS experiment during the magnet ramps. Another important result is the estimation of the probability of short circuit generation, at 68 % confidence level, p$_{short}$$^{HV OFF}$ = 0.42$^{-0.35}$$^{+0.94}$% with detector HV OFF and p$_{short}$$^{HV OFF}$ < 0.49% with the HV ON. These numbers are specific for the detectors used during this test, but they provide a first quantitative indication on the phenomenon, and a point of comparison for future studies adopting the same procedure.
Copyright/License	publication: © 2023-2024 The Author(s) (License: CC-BY-4.0)

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