Performance of a large-area GEM detector prototype for the upgrade of the CMS muon endcap system

D. Abbaneo; M. Abbas; M. Abbrescia; A. A. Abdelalim; M. Abi Akl; W. Ahmed; W. Ahmed; P. Altieri; R. Aly; C. Asawatangtrakuldee; A. Ashfaq; P. Aspell; Y. Assran; I. Awan; S. Bally; Y. Ban; S. Banerjee; P. Barria; L. Benussi; V. Bhopatkar; S. Bianco; J. Bos; O. Bouhali; S. Braibant; S. Buontempo; C. Calabria; M. Caponero; C. Caputo; F. Cassese; A. Castaneda; S. Cauwenbergh; F. R. Cavallo; A. Celik; M. Choi; K. Choi; S. Choi; J. Christiansen; A. Cimmino; S. Colafranceschi; A. Colaleo; A. Conde Garcia; M. M. Dabrowski; G. De Lentdecker; R. De Oliveira; G. De Robertis; S. Dildick; B. Dorney; W. Elmetenawee; G. Fabrice; M. Ferrini; S. Ferry; P. Giacomelli; J. Gilmore; L. Guiducci; A. Gutierrez; R. M. Hadjiiska; A. Hassan; J. Hauser; K. Hoepfner; M. Hohlmann; H. Hoorani; Y. G. Jeng; T. Kamon; P. E. Karchin; H. S. Kim; S. Krutelyov; A. Kumar; J. Lee; T. Lenzi; L. Litov; F. Loddo; T. Maerschalk; G. Magazzu; M. Maggi; Y. Maghrbi; A. Magnani; N. Majumdar; P. K. Mal; K. Mandal; A. Marchioro; A. Marinov; J. A. Merlin; A. K. Mohanty; A. Mohapatra; S. Muhammad; S. Mukhopadhyay; M. Naimuddin; S. Nuzzo; E. Oliveri; L. M. Pant; P. Paolucci; I. Park; G. Passeggio; B. Pavlov; B. Philipps; M. Phipps; D. Piccolo; H. Postema; G. Pugliese; A. Puig Baranac; A. Radi; R. Radogna; G. Raffone; S. Ramkrishna; A. Ranieri; C. Riccardi; A. Rodrigues; L. Ropelewski; S. Roychowdhury; M. S. Ryu; G. Ryu; A. Safonov; A. Sakharov; S. Salva; G. Saviano; A. Sharma; S. K. Swain; J. P. Talvitie; C. Tamma; A. Tatarinov; N. Turini; T. Tuuva; J. Twigger; M. Tytgat; I. Vai; M. Van Stenis; R. Venditi; E. Verhagen; P. Verwilligen; P. Vitulo; D. Wang; M. Wang; U. Yang; Y. Yang; R. Yonamine; N. Zaganidis; F. Zenoni; A. Zhang

doi:10.1109/NSSMIC.2014.7431249

Performance of a large-area GEM detector prototype for the upgrade of the CMS muon endcap system

D. Abbaneo, M. Abbas, M. Abbrescia, A. A. Abdelalim, M. Abi Akl, W. Ahmed, W. Ahmed, P. Altieri, R. Aly, C. Asawatangtrakuldee, A. Ashfaq, P. Aspell, Y. Assran, I. Awan, S. Bally, Y. Ban, S. Banerjee, P. Barria, L. Benussi, V. Bhopatkar^*S. Bianco, J. Bos, O. Bouhali, S. Braibant, S. Buontempo, C. Calabria, M. Caponero, C. Caputo, F. Cassese, A. Castaneda, S. Cauwenbergh, F. R. Cavallo, A. Celik, M. Choi, K. Choi, S. Choi, J. Christiansen, A. Cimmino, S. Colafranceschi, A. Colaleo, A. Conde Garcia, M. M. Dabrowski, G. De Lentdecker, R. De Oliveira, G. De Robertis, S. Dildick, B. Dorney, W. Elmetenawee, G. Fabrice, M. Ferrini, S. Ferry, P. Giacomelli, J. Gilmore, L. Guiducci, A. Gutierrez, R. M. Hadjiiska, A. Hassan, J. Hauser, K. Hoepfner, M. Hohlmann, H. Hoorani, Y. G. Jeng, T. Kamon, P. E. Karchin, H. S. Kim, S. Krutelyov, A. Kumar, J. Lee, T. Lenzi, L. Litov, F. Loddo, T. Maerschalk, G. Magazzu, M. Maggi, Y. Maghrbi, A. Magnani, N. Majumdar, P. K. Mal, K. Mandal, A. Marchioro, A. Marinov, J. A. Merlin, A. K. Mohanty, A. Mohapatra, S. Muhammad, S. Mukhopadhyay, M. Naimuddin, S. Nuzzo, E. Oliveri, L. M. Pant, P. Paolucci, I. Park, G. Passeggio, B. Pavlov, B. Philipps, M. Phipps, D. Piccolo, H. Postema, G. Pugliese, A. Puig Baranac, A. Radi, R. Radogna, G. Raffone, S. Ramkrishna, A. Ranieri, C. Riccardi, A. Rodrigues, L. Ropelewski, S. Roychowdhury, M. S. Ryu, G. Ryu, A. Safonov, A. Sakharov, S. Salva, G. Saviano, A. Sharma, S. K. Swain, J. P. Talvitie, C. Tamma, A. Tatarinov, N. Turini, T. Tuuva, J. Twigger, M. Tytgat, I. Vai, M. Van Stenis, R. Venditi, E. Verhagen, P. Verwilligen, P. Vitulo, D. Wang, M. Wang, U. Yang, Y. Yang, R. Yonamine, N. Zaganidis, F. Zenoni, A. Zhang

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Citations (Scopus)

Abstract

Gas Electron Multiplier (GEM) technology is being considered for the forward muon upgrade of the CMS experiment in Phase 2 of the CERN LHC. Its first implementation is planned for the GE1/1 system in the 1.5 <| η |< 2.2 region of the muon endcap mainly to control muon level-1 trigger rates after the second long LHC shutdown. A GE1/1 triple-GEM detector is read out by 3,072 radial strips with 455 μrad pitch arranged in eight η-sectors. We assembled a full-size GE1/1 prototype of 1m length at Florida Tech and tested it in 20-120 GeV hadron beams at Fermilab using Ar/CO₂ 70:30 and the RD51 scalable readout system. Four small GEM detectors with 2-D readout and an average measured azimuthal resolution of 36 μrad provided precise reference tracks. Construction of this largest GEM detector built to-date is described. Strip cluster parameters, detection efficiency, and spatial resolution are studied with position and high voltage scans. The plateau detection efficiency is [97.1 ± 0.2 (stat)]%. The azimuthal resolution is found to be [123.5 ± 1.6 (stat)] μrad when operating in the center of the efficiency plateau and using full pulse height information. The resolution can be slightly improved by ∼ 10 μrad when correcting for the bias due to discrete readout strips. The CMS upgrade design calls for readout electronics with binary hit output. When strip clusters are formed correspondingly without charge-weighting and with fixed hit thresholds, a position resolution of [136.8 ± 2.5 stat] μrad is measured, consistent with the expected resolution of strip-pitch/equation μrad. Other η-sectors of the detector show similar response and performance.

Original language	English
Title of host publication	2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781479960972
DOIs	https://doi.org/10.1109/NSSMIC.2014.7431249
Publication status	Published - Mar 10 2016
Externally published	Yes
Event	IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014 - Seattle, United States Duration: Nov 8 2014 → Nov 15 2014

Publication series

Name	2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014

Other

Other	IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014
Country/Territory	United States
City	Seattle
Period	11/8/14 → 11/15/14

ASJC Scopus subject areas

Nuclear and High Energy Physics
Radiology Nuclear Medicine and imaging

Access to Document

10.1109/NSSMIC.2014.7431249

Cite this

Abbaneo, D., Abbas, M., Abbrescia, M., Abdelalim, A. A., Abi Akl, M., Ahmed, W., Ahmed, W., Altieri, P., Aly, R., Asawatangtrakuldee, C., Ashfaq, A., Aspell, P., Assran, Y., Awan, I., Bally, S., Ban, Y., Banerjee, S., Barria, P., Benussi, L., ... Zhang, A. (2016). Performance of a large-area GEM detector prototype for the upgrade of the CMS muon endcap system. In 2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014 Article 7431249 (2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NSSMIC.2014.7431249

Performance of a large-area GEM detector prototype for the upgrade of the CMS muon endcap system. / Abbaneo, D.; Abbas, M.; Abbrescia, M. et al.
2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014. Institute of Electrical and Electronics Engineers Inc., 2016. 7431249 (2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abbaneo, D, Abbas, M, Abbrescia, M, Abdelalim, AA, Abi Akl, M, Ahmed, W, Ahmed, W, Altieri, P, Aly, R, Asawatangtrakuldee, C, Ashfaq, A, Aspell, P, Assran, Y, Awan, I, Bally, S, Ban, Y, Banerjee, S, Barria, P, Benussi, L, Bhopatkar, V, Bianco, S, Bos, J, Bouhali, O, Braibant, S, Buontempo, S, Calabria, C, Caponero, M, Caputo, C, Cassese, F, Castaneda, A, Cauwenbergh, S, Cavallo, FR, Celik, A, Choi, M, Choi, K, Choi, S, Christiansen, J, Cimmino, A, Colafranceschi, S, Colaleo, A, Conde Garcia, A, Dabrowski, MM, De Lentdecker, G, De Oliveira, R, De Robertis, G, Dildick, S, Dorney, B, Elmetenawee, W, Fabrice, G, Ferrini, M, Ferry, S, Giacomelli, P, Gilmore, J, Guiducci, L, Gutierrez, A, Hadjiiska, RM, Hassan, A, Hauser, J, Hoepfner, K, Hohlmann, M, Hoorani, H, Jeng, YG, Kamon, T, Karchin, PE, Kim, HS, Krutelyov, S, Kumar, A, Lee, J, Lenzi, T, Litov, L, Loddo, F, Maerschalk, T, Magazzu, G, Maggi, M, Maghrbi, Y, Magnani, A, Majumdar, N, Mal, PK, Mandal, K, Marchioro, A, Marinov, A, Merlin, JA, Mohanty, AK, Mohapatra, A, Muhammad, S, Mukhopadhyay, S, Naimuddin, M, Nuzzo, S, Oliveri, E, Pant, LM, Paolucci, P, Park, I, Passeggio, G, Pavlov, B, Philipps, B, Phipps, M, Piccolo, D, Postema, H, Pugliese, G, Puig Baranac, A, Radi, A, Radogna, R, Raffone, G, Ramkrishna, S, Ranieri, A, Riccardi, C, Rodrigues, A, Ropelewski, L, Roychowdhury, S, Ryu, MS, Ryu, G, Safonov, A, Sakharov, A, Salva, S, Saviano, G, Sharma, A, Swain, SK, Talvitie, JP, Tamma, C, Tatarinov, A, Turini, N, Tuuva, T, Twigger, J, Tytgat, M, Vai, I, Van Stenis, M, Venditi, R, Verhagen, E, Verwilligen, P, Vitulo, P, Wang, D, Wang, M, Yang, U, Yang, Y, Yonamine, R, Zaganidis, N, Zenoni, F & Zhang, A 2016, Performance of a large-area GEM detector prototype for the upgrade of the CMS muon endcap system. in 2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014., 7431249, 2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014, Institute of Electrical and Electronics Engineers Inc., IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014, Seattle, United States, 11/8/14. https://doi.org/10.1109/NSSMIC.2014.7431249

Abbaneo D, Abbas M, Abbrescia M, Abdelalim AA, Abi Akl M, Ahmed W et al. Performance of a large-area GEM detector prototype for the upgrade of the CMS muon endcap system. In 2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014. Institute of Electrical and Electronics Engineers Inc. 2016. 7431249. (2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014). doi: 10.1109/NSSMIC.2014.7431249

Abbaneo, D. ; Abbas, M. ; Abbrescia, M. et al. / Performance of a large-area GEM detector prototype for the upgrade of the CMS muon endcap system. 2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014. Institute of Electrical and Electronics Engineers Inc., 2016. (2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014).

@inproceedings{f2f1cc3413b14bfb96f770bcacd3b810,

title = "Performance of a large-area GEM detector prototype for the upgrade of the CMS muon endcap system",

abstract = "Gas Electron Multiplier (GEM) technology is being considered for the forward muon upgrade of the CMS experiment in Phase 2 of the CERN LHC. Its first implementation is planned for the GE1/1 system in the 1.5 <| η |< 2.2 region of the muon endcap mainly to control muon level-1 trigger rates after the second long LHC shutdown. A GE1/1 triple-GEM detector is read out by 3,072 radial strips with 455 μrad pitch arranged in eight η-sectors. We assembled a full-size GE1/1 prototype of 1m length at Florida Tech and tested it in 20-120 GeV hadron beams at Fermilab using Ar/CO2 70:30 and the RD51 scalable readout system. Four small GEM detectors with 2-D readout and an average measured azimuthal resolution of 36 μrad provided precise reference tracks. Construction of this largest GEM detector built to-date is described. Strip cluster parameters, detection efficiency, and spatial resolution are studied with position and high voltage scans. The plateau detection efficiency is [97.1 ± 0.2 (stat)]%. The azimuthal resolution is found to be [123.5 ± 1.6 (stat)] μrad when operating in the center of the efficiency plateau and using full pulse height information. The resolution can be slightly improved by ∼ 10 μrad when correcting for the bias due to discrete readout strips. The CMS upgrade design calls for readout electronics with binary hit output. When strip clusters are formed correspondingly without charge-weighting and with fixed hit thresholds, a position resolution of [136.8 ± 2.5 stat] μrad is measured, consistent with the expected resolution of strip-pitch/equation μrad. Other η-sectors of the detector show similar response and performance.",

author = "D. Abbaneo and M. Abbas and M. Abbrescia and Abdelalim, {A. A.} and {Abi Akl}, M. and W. Ahmed and W. Ahmed and P. Altieri and R. Aly and C. Asawatangtrakuldee and A. Ashfaq and P. Aspell and Y. Assran and I. Awan and S. Bally and Y. Ban and S. Banerjee and P. Barria and L. Benussi and V. Bhopatkar and S. Bianco and J. Bos and O. Bouhali and S. Braibant and S. Buontempo and C. Calabria and M. Caponero and C. Caputo and F. Cassese and A. Castaneda and S. Cauwenbergh and Cavallo, {F. R.} and A. Celik and M. Choi and K. Choi and S. Choi and J. Christiansen and A. Cimmino and S. Colafranceschi and A. Colaleo and {Conde Garcia}, A. and Dabrowski, {M. M.} and {De Lentdecker}, G. and {De Oliveira}, R. and {De Robertis}, G. and S. Dildick and B. Dorney and W. Elmetenawee and G. Fabrice and M. Ferrini and S. Ferry and P. Giacomelli and J. Gilmore and L. Guiducci and A. Gutierrez and Hadjiiska, {R. M.} and A. Hassan and J. Hauser and K. Hoepfner and M. Hohlmann and H. Hoorani and Jeng, {Y. G.} and T. Kamon and Karchin, {P. E.} and Kim, {H. S.} and S. Krutelyov and A. Kumar and J. Lee and T. Lenzi and L. Litov and F. Loddo and T. Maerschalk and G. Magazzu and M. Maggi and Y. Maghrbi and A. Magnani and N. Majumdar and Mal, {P. K.} and K. Mandal and A. Marchioro and A. Marinov and Merlin, {J. A.} and Mohanty, {A. K.} and A. Mohapatra and S. Muhammad and S. Mukhopadhyay and M. Naimuddin and S. Nuzzo and E. Oliveri and Pant, {L. M.} and P. Paolucci and I. Park and G. Passeggio and B. Pavlov and B. Philipps and M. Phipps and D. Piccolo and H. Postema and G. Pugliese and {Puig Baranac}, A. and A. Radi and R. Radogna and G. Raffone and S. Ramkrishna and A. Ranieri and C. Riccardi and A. Rodrigues and L. Ropelewski and S. Roychowdhury and Ryu, {M. S.} and G. Ryu and A. Safonov and A. Sakharov and S. Salva and G. Saviano and A. Sharma and Swain, {S. K.} and Talvitie, {J. P.} and C. Tamma and A. Tatarinov and N. Turini and T. Tuuva and J. Twigger and M. Tytgat and I. Vai and {Van Stenis}, M. and R. Venditi and E. Verhagen and P. Verwilligen and P. Vitulo and D. Wang and M. Wang and U. Yang and Y. Yang and R. Yonamine and N. Zaganidis and F. Zenoni and A. Zhang",

note = "Publisher Copyright: {\textcopyright} 2014 IEEE.; IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014 ; Conference date: 08-11-2014 Through 15-11-2014",

year = "2016",

month = mar,

day = "10",

doi = "10.1109/NSSMIC.2014.7431249",

language = "English",

series = "2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

booktitle = "2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014",

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TY - GEN

T1 - Performance of a large-area GEM detector prototype for the upgrade of the CMS muon endcap system

AU - Abbaneo, D.

AU - Abbas, M.

AU - Abbrescia, M.

AU - Abdelalim, A. A.

AU - Abi Akl, M.

AU - Ahmed, W.

AU - Altieri, P.

AU - Aly, R.

AU - Asawatangtrakuldee, C.

AU - Ashfaq, A.

AU - Aspell, P.

AU - Assran, Y.

AU - Awan, I.

AU - Bally, S.

AU - Ban, Y.

AU - Banerjee, S.

AU - Barria, P.

AU - Benussi, L.

AU - Bhopatkar, V.

AU - Bianco, S.

AU - Bos, J.

AU - Bouhali, O.

AU - Braibant, S.

AU - Buontempo, S.

AU - Calabria, C.

AU - Caponero, M.

AU - Caputo, C.

AU - Cassese, F.

AU - Castaneda, A.

AU - Cauwenbergh, S.

AU - Cavallo, F. R.

AU - Celik, A.

AU - Choi, M.

AU - Choi, K.

AU - Choi, S.

AU - Christiansen, J.

AU - Cimmino, A.

AU - Colafranceschi, S.

AU - Colaleo, A.

AU - Conde Garcia, A.

AU - Dabrowski, M. M.

AU - De Lentdecker, G.

AU - De Oliveira, R.

AU - De Robertis, G.

AU - Dildick, S.

AU - Dorney, B.

AU - Elmetenawee, W.

AU - Fabrice, G.

AU - Ferrini, M.

AU - Ferry, S.

AU - Giacomelli, P.

AU - Gilmore, J.

AU - Guiducci, L.

AU - Gutierrez, A.

AU - Hadjiiska, R. M.

AU - Hassan, A.

AU - Hauser, J.

AU - Hoepfner, K.

AU - Hohlmann, M.

AU - Hoorani, H.

AU - Jeng, Y. G.

AU - Kamon, T.

AU - Karchin, P. E.

AU - Kim, H. S.

AU - Krutelyov, S.

AU - Kumar, A.

AU - Lee, J.

AU - Lenzi, T.

AU - Litov, L.

AU - Loddo, F.

AU - Maerschalk, T.

AU - Magazzu, G.

AU - Maggi, M.

AU - Maghrbi, Y.

AU - Magnani, A.

AU - Majumdar, N.

AU - Mal, P. K.

AU - Mandal, K.

AU - Marchioro, A.

AU - Marinov, A.

AU - Merlin, J. A.

AU - Mohanty, A. K.

AU - Mohapatra, A.

AU - Muhammad, S.

AU - Mukhopadhyay, S.

AU - Naimuddin, M.

AU - Nuzzo, S.

AU - Oliveri, E.

AU - Pant, L. M.

AU - Paolucci, P.

AU - Park, I.

AU - Passeggio, G.

AU - Pavlov, B.

AU - Philipps, B.

AU - Phipps, M.

AU - Piccolo, D.

AU - Postema, H.

AU - Pugliese, G.

AU - Puig Baranac, A.

AU - Radi, A.

AU - Radogna, R.

AU - Raffone, G.

AU - Ramkrishna, S.

AU - Ranieri, A.

AU - Riccardi, C.

AU - Rodrigues, A.

AU - Ropelewski, L.

AU - Roychowdhury, S.

AU - Ryu, M. S.

AU - Ryu, G.

AU - Safonov, A.

AU - Sakharov, A.

AU - Salva, S.

AU - Saviano, G.

AU - Sharma, A.

AU - Swain, S. K.

AU - Talvitie, J. P.

AU - Tamma, C.

AU - Tatarinov, A.

AU - Turini, N.

AU - Tuuva, T.

AU - Twigger, J.

AU - Tytgat, M.

AU - Vai, I.

AU - Van Stenis, M.

AU - Venditi, R.

AU - Verhagen, E.

AU - Verwilligen, P.

AU - Vitulo, P.

AU - Wang, D.

AU - Wang, M.

AU - Yang, U.

AU - Yang, Y.

AU - Yonamine, R.

AU - Zaganidis, N.

AU - Zenoni, F.

AU - Zhang, A.

PY - 2016/3/10

Y1 - 2016/3/10

N2 - Gas Electron Multiplier (GEM) technology is being considered for the forward muon upgrade of the CMS experiment in Phase 2 of the CERN LHC. Its first implementation is planned for the GE1/1 system in the 1.5 <| η |< 2.2 region of the muon endcap mainly to control muon level-1 trigger rates after the second long LHC shutdown. A GE1/1 triple-GEM detector is read out by 3,072 radial strips with 455 μrad pitch arranged in eight η-sectors. We assembled a full-size GE1/1 prototype of 1m length at Florida Tech and tested it in 20-120 GeV hadron beams at Fermilab using Ar/CO2 70:30 and the RD51 scalable readout system. Four small GEM detectors with 2-D readout and an average measured azimuthal resolution of 36 μrad provided precise reference tracks. Construction of this largest GEM detector built to-date is described. Strip cluster parameters, detection efficiency, and spatial resolution are studied with position and high voltage scans. The plateau detection efficiency is [97.1 ± 0.2 (stat)]%. The azimuthal resolution is found to be [123.5 ± 1.6 (stat)] μrad when operating in the center of the efficiency plateau and using full pulse height information. The resolution can be slightly improved by ∼ 10 μrad when correcting for the bias due to discrete readout strips. The CMS upgrade design calls for readout electronics with binary hit output. When strip clusters are formed correspondingly without charge-weighting and with fixed hit thresholds, a position resolution of [136.8 ± 2.5 stat] μrad is measured, consistent with the expected resolution of strip-pitch/equation μrad. Other η-sectors of the detector show similar response and performance.

AB - Gas Electron Multiplier (GEM) technology is being considered for the forward muon upgrade of the CMS experiment in Phase 2 of the CERN LHC. Its first implementation is planned for the GE1/1 system in the 1.5 <| η |< 2.2 region of the muon endcap mainly to control muon level-1 trigger rates after the second long LHC shutdown. A GE1/1 triple-GEM detector is read out by 3,072 radial strips with 455 μrad pitch arranged in eight η-sectors. We assembled a full-size GE1/1 prototype of 1m length at Florida Tech and tested it in 20-120 GeV hadron beams at Fermilab using Ar/CO2 70:30 and the RD51 scalable readout system. Four small GEM detectors with 2-D readout and an average measured azimuthal resolution of 36 μrad provided precise reference tracks. Construction of this largest GEM detector built to-date is described. Strip cluster parameters, detection efficiency, and spatial resolution are studied with position and high voltage scans. The plateau detection efficiency is [97.1 ± 0.2 (stat)]%. The azimuthal resolution is found to be [123.5 ± 1.6 (stat)] μrad when operating in the center of the efficiency plateau and using full pulse height information. The resolution can be slightly improved by ∼ 10 μrad when correcting for the bias due to discrete readout strips. The CMS upgrade design calls for readout electronics with binary hit output. When strip clusters are formed correspondingly without charge-weighting and with fixed hit thresholds, a position resolution of [136.8 ± 2.5 stat] μrad is measured, consistent with the expected resolution of strip-pitch/equation μrad. Other η-sectors of the detector show similar response and performance.

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UR - http://www.scopus.com/inward/citedby.url?scp=84965029819&partnerID=8YFLogxK

U2 - 10.1109/NSSMIC.2014.7431249

DO - 10.1109/NSSMIC.2014.7431249

M3 - Conference contribution

AN - SCOPUS:84965029819

T3 - 2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014

BT - 2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014

Y2 - 8 November 2014 through 15 November 2014

ER -

Performance of a large-area GEM detector prototype for the upgrade of the CMS muon endcap system

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