Layout and assembly technique of the GEM chambers for the upgrade of the CMS first muon endcap station

D. Abbaneo; M. Abbas; M. Abbrescia; H. Abdalla; A. Ahmad; A. Ahmed; W. Ahmed; C. Ali; I. Asghar; P. Aspell; Y. Assran; C. Avila; Y. Ban; R. Band; S. Bansal; G. Bencze; N. Beni; L. Benussi; V. Bhatnagar; V. Bhopatkar; M. Bianco; S. Bianco; L. Borgonovi; O. Bouhali; A. Braghieri; S. Braibant-Giacomelli; C. Bravo; V. Cafaro; C. Calabria; C. Salazar; M. Caponero; F. Cassese; A. Hernandez; F. Cavallo; N. Cavallo; Y. Choi; S. Colafranceschi; A. Colaleo; A. Conde Garcia; M. Dalchenko; G. De Lentdecker; D. Dell Olio; G. De Robertis; S. Dildick; B. Dorney; G. Endroczi; R. Erbacher; F. Errico; F. Fallavollita; E. Fontanesi; M. Franco; P. Giacomelli; S. Gigli; J. Gilmore; V. Giordano; M. Gola; M. Gruchala; L. Guiducci; R. Gupta; A. Gutierrez; R. Hadjiiska; T. Hakkarainen; J. Hauser; C. Heidemann; K. Hoepfner; M. Hohlmann; H. Hoorani; H. Huang; Q. Huang; T. Huang; P. Iaydjiev; Y. Inseok; A. Irshad; Y. Jeng; V. Jha; A. Juodagalvis; E. Juska; T. Kamon; P. Karchin; A. Kaur; H. Keller; W. Khan; J. Kim; H. Kim; R. King; A. Kumar; P. Kumari; N. Lacalamita; J. Lee; T. Lenzi; A. Leonard; A. Levin; Q. Li; F. Licciulli; L. Litov; F. Loddo; M. Lohan; M. Maggi; A. Magnani; N. Majumdar; S. Malhotra; A. Marinov; S. Martirodonna; N. McColl; C. McLean; J. Merlin; D. Mishra; G. Mocellin; S. Mohamed; T. Mohamed; J. Molnar; L. Moureaux; S. Muhammad; S. Mukhopadhyay; S. Murtaza; M. Naimuddin; N. Vanegas; P. Netrakanti; S. Nuzzo; R. Oliveira; L. Pant; P. Paolucci; I. Park; L. Passamonti; G. Passeggio; C. Pastore; B. Pavlov; A. Peck; H. Petrow; B. Philipps; D. Piccolo; D. Pierluigi; F. Primavera; R. Radogna; G. Raffone; M. Rahmani; A. Ranieri; V. Rapsevicius; G. Rashevski; M. Ressegotti; C. Riccardi; M. Rodozov; E. Romano; C. Roskas; P. Rout; A. Russo; A. Safonov; D. Saltzberg; G. Saviano; A. H. Shah; A. Sharma; R. Sharma; M. Shopova; F. Simone; J. B. Singh; E. Soldani; E. Starling; J. Sturdy; A. Sultan; G. Sultanov; Z. Szillasi; F. Thyssen; T. Tuuva; M. Tytgat; B. Ujvari; I. Vai; R. Venditti; P. Verwilligen; P. Vitulo; D. Wang; Y. Yang; U. Yang; R. Yonamine; I. Yu; S. Zaleski

doi:10.1016/j.nima.2018.11.061

Layout and assembly technique of the GEM chambers for the upgrade of the CMS first muon endcap station

D. Abbaneo, M. Abbas, M. Abbrescia, H. Abdalla, A. Ahmad, A. Ahmed, W. Ahmed, C. Ali, I. Asghar, P. Aspell, Y. Assran, C. Avila, Y. Ban, R. Band, S. Bansal, G. Bencze, N. Beni, L. Benussi, V. Bhatnagar, V. BhopatkarM. Bianco, S. Bianco, L. Borgonovi, O. Bouhali, A. Braghieri, S. Braibant-Giacomelli, C. Bravo, V. Cafaro, C. Calabria, C. Salazar, M. Caponero, F. Cassese, A. Hernandez, F. Cavallo, N. Cavallo, Y. Choi, S. Colafranceschi, A. Colaleo, A. Conde Garcia, M. Dalchenko, G. De Lentdecker, D. Dell Olio, G. De Robertis, S. Dildick, B. Dorney, G. Endroczi, R. Erbacher, F. Errico, F. Fallavollita, E. Fontanesi, M. Franco, P. Giacomelli, S. Gigli, J. Gilmore, V. Giordano, M. Gola, M. Gruchala, L. Guiducci, R. Gupta, A. Gutierrez, R. Hadjiiska, T. Hakkarainen, J. Hauser, C. Heidemann, K. Hoepfner, M. Hohlmann, H. Hoorani, H. Huang, Q. Huang, T. Huang, P. Iaydjiev, Y. Inseok, A. Irshad, Y. Jeng, V. Jha, A. Juodagalvis, E. Juska, T. Kamon, P. Karchin, A. Kaur, H. Keller, W. Khan, J. Kim, H. Kim, R. King, A. Kumar, P. Kumari, N. Lacalamita, J. Lee, T. Lenzi, A. Leonard, A. Levin, Q. Li, F. Licciulli, L. Litov, F. Loddo, M. Lohan, M. Maggi, A. Magnani, N. Majumdar, S. Malhotra, A. Marinov, S. Martirodonna, N. McColl, C. McLean, J. Merlin, D. Mishra, G. Mocellin, S. Mohamed, T. Mohamed, J. Molnar, L. Moureaux, S. Muhammad, S. Mukhopadhyay, S. Murtaza, M. Naimuddin, N. Vanegas, P. Netrakanti, S. Nuzzo, R. Oliveira, L. Pant, P. Paolucci, I. Park, L. Passamonti, G. Passeggio, C. Pastore, B. Pavlov, A. Peck, H. Petrow, B. Philipps, D. Piccolo, D. Pierluigi, F. Primavera, R. Radogna, G. Raffone, M. Rahmani, A. Ranieri, V. Rapsevicius, G. Rashevski, M. Ressegotti, C. Riccardi, M. Rodozov, E. Romano, C. Roskas, P. Rout, A. Russo, A. Safonov, D. Saltzberg, G. Saviano, A. H. Shah, A. Sharma, R. Sharma, M. Shopova, F. Simone, J. B. Singh, E. Soldani, E. Starling, J. Sturdy, A. Sultan, G. Sultanov, Z. Szillasi, F. Thyssen, T. Tuuva, M. Tytgat, B. Ujvari, I. Vai, R. Venditti, P. Verwilligen, P. Vitulo, D. Wang, Y. Yang, U. Yang, R. Yonamine, I. Yu, S. Zaleski

SCI - Physics

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Triple-GEM detector technology was recently selected by CMS for a part of the upgrade of its forward muon detector system as GEM detectors provide a stable operation in the high radiation environment expected during the future High-Luminosity phase of the Large Hadron Collider (HL-LHC). In a first step, GEM chambers (detectors) will be installed in the innermost muon endcap station in the 1.6<η<2.2 pseudo-rapidity region, mainly to control level-1 muon trigger rates after the second LHC Long Shutdown. These new chambers will add redundancy to the muon system in the η-region where the background rates are high, and the bending of the muon trajectories due to the CMS magnetic field is small. A novel construction technique for such chambers has been developed in such a way where foils are mounted onto a single stack and then uniformly stretched mechanically, avoiding the use of spacers and glue inside the active gas volume. We describe the layout, the stretching mechanism and the overall assembly technique of such GEM chambers.

Original language	English
Pages (from-to)	67-75
Number of pages	9
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	918
DOIs	https://doi.org/10.1016/j.nima.2018.11.061
Publication status	Published - 2019 Feb 21

Keywords

CMS
GEM
High Luminosity LHC

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

Access to Document

10.1016/j.nima.2018.11.061

Cite this

Abbaneo, D., Abbas, M., Abbrescia, M., Abdalla, H., Ahmad, A., Ahmed, A., Ahmed, W., Ali, C., Asghar, I., Aspell, P., Assran, Y., Avila, C., Ban, Y., Band, R., Bansal, S., Bencze, G., Beni, N., Benussi, L., Bhatnagar, V., ... Zaleski, S. (2019). Layout and assembly technique of the GEM chambers for the upgrade of the CMS first muon endcap station. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 918, 67-75. https://doi.org/10.1016/j.nima.2018.11.061

Layout and assembly technique of the GEM chambers for the upgrade of the CMS first muon endcap station. / Abbaneo, D.; Abbas, M.; Abbrescia, M. et al.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 918, 21.02.2019, p. 67-75.

Research output: Contribution to journal › Article › peer-review

Abbaneo, D, Abbas, M, Abbrescia, M, Abdalla, H, Ahmad, A, Ahmed, A, Ahmed, W, Ali, C, Asghar, I, Aspell, P, Assran, Y, Avila, C, Ban, Y, Band, R, Bansal, S, Bencze, G, Beni, N, Benussi, L, Bhatnagar, V, Bhopatkar, V, Bianco, M, Bianco, S, Borgonovi, L, Bouhali, O, Braghieri, A, Braibant-Giacomelli, S, Bravo, C, Cafaro, V, Calabria, C, Salazar, C, Caponero, M, Cassese, F, Hernandez, A, Cavallo, F, Cavallo, N, Choi, Y, Colafranceschi, S, Colaleo, A, Garcia, AC, Dalchenko, M, De Lentdecker, G, Dell Olio, D, De Robertis, G, Dildick, S, Dorney, B, Endroczi, G, Erbacher, R, Errico, F, Fallavollita, F, Fontanesi, E, Franco, M, Giacomelli, P, Gigli, S, Gilmore, J, Giordano, V, Gola, M, Gruchala, M, Guiducci, L, Gupta, R, Gutierrez, A, Hadjiiska, R, Hakkarainen, T, Hauser, J, Heidemann, C, Hoepfner, K, Hohlmann, M, Hoorani, H, Huang, H, Huang, Q, Huang, T, Iaydjiev, P, Inseok, Y, Irshad, A, Jeng, Y, Jha, V, Juodagalvis, A, Juska, E, Kamon, T, Karchin, P, Kaur, A, Keller, H, Khan, W, Kim, J, Kim, H, King, R, Kumar, A, Kumari, P, Lacalamita, N, Lee, J, Lenzi, T, Leonard, A, Levin, A, Li, Q, Licciulli, F, Litov, L, Loddo, F, Lohan, M, Maggi, M, Magnani, A, Majumdar, N, Malhotra, S, Marinov, A, Martirodonna, S, McColl, N, McLean, C, Merlin, J, Mishra, D, Mocellin, G, Mohamed, S, Mohamed, T, Molnar, J, Moureaux, L, Muhammad, S, Mukhopadhyay, S, Murtaza, S, Naimuddin, M, Vanegas, N, Netrakanti, P, Nuzzo, S, Oliveira, R, Pant, L, Paolucci, P, Park, I, Passamonti, L, Passeggio, G, Pastore, C, Pavlov, B, Peck, A, Petrow, H, Philipps, B, Piccolo, D, Pierluigi, D, Primavera, F, Radogna, R, Raffone, G, Rahmani, M, Ranieri, A, Rapsevicius, V, Rashevski, G, Ressegotti, M, Riccardi, C, Rodozov, M, Romano, E, Roskas, C, Rout, P, Russo, A, Safonov, A, Saltzberg, D, Saviano, G, Shah, AH, Sharma, A, Sharma, R, Shopova, M, Simone, F, Singh, JB, Soldani, E, Starling, E, Sturdy, J, Sultan, A, Sultanov, G, Szillasi, Z, Thyssen, F, Tuuva, T, Tytgat, M, Ujvari, B, Vai, I, Venditti, R, Verwilligen, P, Vitulo, P, Wang, D, Yang, Y, Yang, U, Yonamine, R, Yu, I & Zaleski, S 2019, 'Layout and assembly technique of the GEM chambers for the upgrade of the CMS first muon endcap station', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 918, pp. 67-75. https://doi.org/10.1016/j.nima.2018.11.061

@article{5215c09f266546848d3b86bce15650c1,

title = "Layout and assembly technique of the GEM chambers for the upgrade of the CMS first muon endcap station",

abstract = "Triple-GEM detector technology was recently selected by CMS for a part of the upgrade of its forward muon detector system as GEM detectors provide a stable operation in the high radiation environment expected during the future High-Luminosity phase of the Large Hadron Collider (HL-LHC). In a first step, GEM chambers (detectors) will be installed in the innermost muon endcap station in the 1.6<η<2.2 pseudo-rapidity region, mainly to control level-1 muon trigger rates after the second LHC Long Shutdown. These new chambers will add redundancy to the muon system in the η-region where the background rates are high, and the bending of the muon trajectories due to the CMS magnetic field is small. A novel construction technique for such chambers has been developed in such a way where foils are mounted onto a single stack and then uniformly stretched mechanically, avoiding the use of spacers and glue inside the active gas volume. We describe the layout, the stretching mechanism and the overall assembly technique of such GEM chambers.",

keywords = "CMS, GEM, High Luminosity LHC",

author = "D. Abbaneo and M. Abbas and M. Abbrescia and H. Abdalla and A. Ahmad and A. Ahmed and W. Ahmed and C. Ali and I. Asghar and P. Aspell and Y. Assran and C. Avila and Y. Ban and R. Band and S. Bansal and G. Bencze and N. Beni and L. Benussi and V. Bhatnagar and V. Bhopatkar and M. Bianco and S. Bianco and L. Borgonovi and O. Bouhali and A. Braghieri and S. Braibant-Giacomelli and C. Bravo and V. Cafaro and C. Calabria and C. Salazar and M. Caponero and F. Cassese and A. Hernandez and F. Cavallo and N. Cavallo and Y. Choi and S. Colafranceschi and A. Colaleo and Garcia, {A. Conde} and M. Dalchenko and {De Lentdecker}, G. and {Dell Olio}, D. and {De Robertis}, G. and S. Dildick and B. Dorney and G. Endroczi and R. Erbacher and F. Errico and F. Fallavollita and E. Fontanesi and M. Franco and P. Giacomelli and S. Gigli and J. Gilmore and V. Giordano and M. Gola and M. Gruchala and L. Guiducci and R. Gupta and A. Gutierrez and R. Hadjiiska and T. Hakkarainen and J. Hauser and C. Heidemann and K. Hoepfner and M. Hohlmann and H. Hoorani and H. Huang and Q. Huang and T. Huang and P. Iaydjiev and Y. Inseok and A. Irshad and Y. Jeng and V. Jha and A. Juodagalvis and E. Juska and T. Kamon and P. Karchin and A. Kaur and H. Keller and W. Khan and J. Kim and H. Kim and R. King and A. Kumar and P. Kumari and N. Lacalamita and J. Lee and T. Lenzi and A. Leonard and A. Levin and Q. Li and F. Licciulli and L. Litov and F. Loddo and M. Lohan and M. Maggi and A. Magnani and N. Majumdar and S. Malhotra and A. Marinov and S. Martirodonna and N. McColl and C. McLean and J. Merlin and D. Mishra and G. Mocellin and S. Mohamed and T. Mohamed and J. Molnar and L. Moureaux and S. Muhammad and S. Mukhopadhyay and S. Murtaza and M. Naimuddin and N. Vanegas and P. Netrakanti and S. Nuzzo and R. Oliveira and L. Pant and P. Paolucci and I. Park and L. Passamonti and G. Passeggio and C. Pastore and B. Pavlov and A. Peck and H. Petrow and B. Philipps and D. Piccolo and D. Pierluigi and F. Primavera and R. Radogna and G. Raffone and M. Rahmani and A. Ranieri and V. Rapsevicius and G. Rashevski and M. Ressegotti and C. Riccardi and M. Rodozov and E. Romano and C. Roskas and P. Rout and A. Russo and A. Safonov and D. Saltzberg and G. Saviano and Shah, {A. H.} and A. Sharma and R. Sharma and M. Shopova and F. Simone and Singh, {J. B.} and E. Soldani and E. Starling and J. Sturdy and A. Sultan and G. Sultanov and Z. Szillasi and F. Thyssen and T. Tuuva and M. Tytgat and B. Ujvari and I. Vai and R. Venditti and P. Verwilligen and P. Vitulo and D. Wang and Y. Yang and U. Yang and R. Yonamine and I. Yu and S. Zaleski",

note = "Funding Information: We gratefully acknowledge the support from FRS-FNRS (Belgium), FWO-Flanders (Belgium), BSF-MES (Bulgaria), BMBF (Germany), DAE (India), DST (India), INFN (Italy), NRF (Korea), LAS (Lithuania), QNRF (Qatar), DOE (USA) and the RD51 collaboration. Funding Information: We gratefully acknowledge the support from FRS-FNRS (Belgium) , FWO-Flanders (Belgium) , BSF-MES (Bulgaria) , BMBF (Germany) , DAE (India) , DST (India) , INFN (Italy) , NRF (Korea) , LAS (Lithuania) , QNRF (Qatar) , DOE (USA) and the RD51 collaboration . Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2019",

month = feb,

day = "21",

doi = "10.1016/j.nima.2018.11.061",

language = "English",

volume = "918",

pages = "67--75",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

publisher = "Elsevier",

}

TY - JOUR

T1 - Layout and assembly technique of the GEM chambers for the upgrade of the CMS first muon endcap station

AU - Abbaneo, D.

AU - Abbas, M.

AU - Abbrescia, M.

AU - Abdalla, H.

AU - Ahmad, A.

AU - Ahmed, A.

AU - Ahmed, W.

AU - Ali, C.

AU - Asghar, I.

AU - Aspell, P.

AU - Assran, Y.

AU - Avila, C.

AU - Ban, Y.

AU - Band, R.

AU - Bansal, S.

AU - Bencze, G.

AU - Beni, N.

AU - Benussi, L.

AU - Bhatnagar, V.

AU - Bhopatkar, V.

AU - Bianco, M.

AU - Bianco, S.

AU - Borgonovi, L.

AU - Bouhali, O.

AU - Braghieri, A.

AU - Braibant-Giacomelli, S.

AU - Bravo, C.

AU - Cafaro, V.

AU - Calabria, C.

AU - Salazar, C.

AU - Caponero, M.

AU - Cassese, F.

AU - Hernandez, A.

AU - Cavallo, F.

AU - Cavallo, N.

AU - Choi, Y.

AU - Colafranceschi, S.

AU - Colaleo, A.

AU - Garcia, A. Conde

AU - Dalchenko, M.

AU - De Lentdecker, G.

AU - Dell Olio, D.

AU - De Robertis, G.

AU - Dildick, S.

AU - Dorney, B.

AU - Endroczi, G.

AU - Erbacher, R.

AU - Errico, F.

AU - Fallavollita, F.

AU - Fontanesi, E.

AU - Franco, M.

AU - Giacomelli, P.

AU - Gigli, S.

AU - Gilmore, J.

AU - Giordano, V.

AU - Gola, M.

AU - Gruchala, M.

AU - Guiducci, L.

AU - Gupta, R.

AU - Gutierrez, A.

AU - Hadjiiska, R.

AU - Hakkarainen, T.

AU - Hauser, J.

AU - Heidemann, C.

AU - Hoepfner, K.

AU - Hohlmann, M.

AU - Hoorani, H.

AU - Huang, H.

AU - Huang, Q.

AU - Huang, T.

AU - Iaydjiev, P.

AU - Inseok, Y.

AU - Irshad, A.

AU - Jeng, Y.

AU - Jha, V.

AU - Juodagalvis, A.

AU - Juska, E.

AU - Kamon, T.

AU - Karchin, P.

AU - Kaur, A.

AU - Keller, H.

AU - Khan, W.

AU - Kim, J.

AU - Kim, H.

AU - King, R.

AU - Kumar, A.

AU - Kumari, P.

AU - Lacalamita, N.

AU - Lee, J.

AU - Lenzi, T.

AU - Leonard, A.

AU - Levin, A.

AU - Li, Q.

AU - Licciulli, F.

AU - Litov, L.

AU - Loddo, F.

AU - Lohan, M.

AU - Maggi, M.

AU - Magnani, A.

AU - Majumdar, N.

AU - Malhotra, S.

AU - Marinov, A.

AU - Martirodonna, S.

AU - McColl, N.

AU - McLean, C.

AU - Merlin, J.

AU - Mishra, D.

AU - Mocellin, G.

AU - Mohamed, S.

AU - Mohamed, T.

AU - Molnar, J.

AU - Moureaux, L.

AU - Muhammad, S.

AU - Mukhopadhyay, S.

AU - Murtaza, S.

AU - Naimuddin, M.

AU - Vanegas, N.

AU - Netrakanti, P.

AU - Nuzzo, S.

AU - Oliveira, R.

AU - Pant, L.

AU - Paolucci, P.

AU - Park, I.

AU - Passamonti, L.

AU - Passeggio, G.

AU - Pastore, C.

AU - Pavlov, B.

AU - Peck, A.

AU - Petrow, H.

AU - Philipps, B.

AU - Piccolo, D.

AU - Pierluigi, D.

AU - Primavera, F.

AU - Radogna, R.

AU - Raffone, G.

AU - Rahmani, M.

AU - Ranieri, A.

AU - Rapsevicius, V.

AU - Rashevski, G.

AU - Ressegotti, M.

AU - Riccardi, C.

AU - Rodozov, M.

AU - Romano, E.

AU - Roskas, C.

AU - Rout, P.

AU - Russo, A.

AU - Safonov, A.

AU - Saltzberg, D.

AU - Saviano, G.

AU - Shah, A. H.

AU - Sharma, A.

AU - Sharma, R.

AU - Shopova, M.

AU - Simone, F.

AU - Singh, J. B.

AU - Soldani, E.

AU - Starling, E.

AU - Sturdy, J.

AU - Sultan, A.

AU - Sultanov, G.

AU - Szillasi, Z.

AU - Thyssen, F.

AU - Tuuva, T.

AU - Tytgat, M.

AU - Ujvari, B.

AU - Vai, I.

AU - Venditti, R.

AU - Verwilligen, P.

AU - Vitulo, P.

AU - Wang, D.

AU - Yang, Y.

AU - Yang, U.

AU - Yonamine, R.

AU - Yu, I.

AU - Zaleski, S.

N1 - Funding Information: We gratefully acknowledge the support from FRS-FNRS (Belgium), FWO-Flanders (Belgium), BSF-MES (Bulgaria), BMBF (Germany), DAE (India), DST (India), INFN (Italy), NRF (Korea), LAS (Lithuania), QNRF (Qatar), DOE (USA) and the RD51 collaboration. Funding Information: We gratefully acknowledge the support from FRS-FNRS (Belgium) , FWO-Flanders (Belgium) , BSF-MES (Bulgaria) , BMBF (Germany) , DAE (India) , DST (India) , INFN (Italy) , NRF (Korea) , LAS (Lithuania) , QNRF (Qatar) , DOE (USA) and the RD51 collaboration . Publisher Copyright: © 2018 Elsevier B.V.

PY - 2019/2/21

Y1 - 2019/2/21

N2 - Triple-GEM detector technology was recently selected by CMS for a part of the upgrade of its forward muon detector system as GEM detectors provide a stable operation in the high radiation environment expected during the future High-Luminosity phase of the Large Hadron Collider (HL-LHC). In a first step, GEM chambers (detectors) will be installed in the innermost muon endcap station in the 1.6<η<2.2 pseudo-rapidity region, mainly to control level-1 muon trigger rates after the second LHC Long Shutdown. These new chambers will add redundancy to the muon system in the η-region where the background rates are high, and the bending of the muon trajectories due to the CMS magnetic field is small. A novel construction technique for such chambers has been developed in such a way where foils are mounted onto a single stack and then uniformly stretched mechanically, avoiding the use of spacers and glue inside the active gas volume. We describe the layout, the stretching mechanism and the overall assembly technique of such GEM chambers.

AB - Triple-GEM detector technology was recently selected by CMS for a part of the upgrade of its forward muon detector system as GEM detectors provide a stable operation in the high radiation environment expected during the future High-Luminosity phase of the Large Hadron Collider (HL-LHC). In a first step, GEM chambers (detectors) will be installed in the innermost muon endcap station in the 1.6<η<2.2 pseudo-rapidity region, mainly to control level-1 muon trigger rates after the second LHC Long Shutdown. These new chambers will add redundancy to the muon system in the η-region where the background rates are high, and the bending of the muon trajectories due to the CMS magnetic field is small. A novel construction technique for such chambers has been developed in such a way where foils are mounted onto a single stack and then uniformly stretched mechanically, avoiding the use of spacers and glue inside the active gas volume. We describe the layout, the stretching mechanism and the overall assembly technique of such GEM chambers.

KW - CMS

KW - GEM

KW - High Luminosity LHC

UR - http://www.scopus.com/inward/record.url?scp=85059164074&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85059164074&partnerID=8YFLogxK

U2 - 10.1016/j.nima.2018.11.061

DO - 10.1016/j.nima.2018.11.061

M3 - Article

AN - SCOPUS:85059164074

SN - 0168-9002

VL - 918

SP - 67

EP - 75

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ER -

Layout and assembly technique of the GEM chambers for the upgrade of the CMS first muon endcap station

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