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Impact of magnetic field on the stability of the CMS GE1/1 GEM detector operation
/ 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.) et al.
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. [...]
2023 - 24 p.
- Published in : JINST 18 (2023) P11029
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Triple-GEM discharge probability studies at CHARM: simulations and experimental results
/ CMS Muon Group Collaboration
The CMS muon system in the region with 2.03<|η|<2.82 is characterized by a very harsh radiation environment which can generate hit rates up to 144 kHz/cm2 and an integrated charge of 8 C/cm2 over ten years of operation. In order to increase the detector performance and acceptance for physics events including muons, a new muon station (ME0) has been proposed for installation in that region. [...]
2020 - 23 p.
- Published in : JINST 15 (2020) P10013
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Detector Control System for the GE1/1 slice test
/ Abbas, M (KIT, Karlsruhe) ; Abbrescia, M (Bari Polytechnic ; Bari U. ; INFN, Bari) ; Abdalla, H (Cairo, Acad. Sci. Res. Tech.) ; Zeid, S Abu (Cairo, Acad. Sci. Res. Tech.) ; Agapitos, A (Peking U.) ; Ahmad, A (NCP, Islamabad) ; Ahmed, A (Cairo, Acad. Sci. Res. Tech.) ; Ahmed, A (Delhi U.) ; Ahmed, W (NCP, Islamabad) ; Amarjeet, S (Panjab U.) et al.
Gas Electron Multiplier (GEM) technology, in particular triple-GEM, was selected for the upgrade of the CMS endcap muon system following several years of intense effort on R&D.; The triple-GEM chambers (GE1/1) are being installed at station 1 during the second long shutdown with the goal of reducing the Level-1 muon trigger rate and improving the tracking performance in the harsh radiation environment foreseen in the future LHC operation [1]. A first installation of a demonstrator system started at the beginning of 2017: 10 triple-GEM detectors were installed in the CMS muon system with the aim of gaining operational experience and demonstrating the integration of the GE1/1 system into the trigger. [...]
2020 - 19 p.
- Published in : JINST 15 (2020) P05023
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Performance of a triple-GEM demonstrator in pp collisions at the CMS detector
/ Abbas, M. (KIT, Karlsruhe) ; Abbrescia, M. (Bari U. ; INFN, Bari) ; Abdalla, H. (Ain Shams U., Cairo ; American U., Cairo) ; Abdelalim, A. (Ain Shams U., Cairo ; Zewail City Sci. Technol., Giza) ; AbuZeid, S. (Ain Shams U., Cairo) ; Agapitos, A. (Peking U.) ; Ahmad, A. (NCP, Islamabad) ; Ahmed, A. (Delhi U.) ; Ahmed, W. (NCP, Islamabad) ; Aimè, C. (INFN, Pavia) et al.
After the Phase-2 high-luminosity upgrade to the Large Hadron Collider (LHC), the collision rate and therefore the background rate will significantly increase, particularly in the high $\eta$ region. To improve both the tracking and triggering of muons, the Compact Muon Solenoid (CMS) Collaboration plans to install triple-layer Gas Electron Multiplier (GEM) detectors in the CMS muon endcaps. [...]
arXiv:2107.09364.-
2021-11-12 - 10 p.
- Published in : JINST 16 (2021) P11014
Fulltext: 2107.09364 - PDF; document - PDF;
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Layout and Assembly Technique of the GEM Chambers for the Upgrade of the CMS First Muon Endcap Station
/ CMS Muon Collaboration
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 $1.6<\left|\eta\right|<2.2$ pseudo-rapidity region, mainly to control level-1 muon trigger rates after the second LHC Long Shutdown. [...]
arXiv:1812.00411.-
2018-11-28 - 9 p.
- Published in : Nucl. Instrum. Meth. A 918 (2019) 67-75
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Operational Experience With the GEM Detector Assembly Lines for the CMS Forward Muon Upgrade
/ Abbaneo, D (CERN) ; Abbrescia, M (Bari Polytechnic ; INFN, Bari) ; Ahmad, A (NCP, Islamabad) ; Ahmed, W (NCP, Islamabad) ; Ali, C (Texas A-M) ; Altieri, P R (Bari Polytechnic ; INFN, Bari) ; Amr, M (Cairo, Acad. Sci. Res. Tech.) ; Asghar, I (NCP, Islamabad) ; Aspell, P (CERN) ; Assran, Y (Cairo, Acad. Sci. Res. Tech.) et al.
The CMS Collaboration has been developing large-area triple-gas electron multiplier (GEM) detectors to be installed in the muon Endcap regions of the CMS experiment in 2019 to maintain forward muon trigger and tracking performance at the High-Luminosity upgrade of the Large Hadron Collider (LHC); 10 preproduction detectors were built at CERN to commission the first assembly line and the quality controls (QCs). These were installed in the CMS detector in early 2017 and participated in the 2017 LHC run. [...]
2018 - 9 p.
- Published in : IEEE Trans. Nucl. Sci. 65 (2018) 2808-2816
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Quality control of mass-produced GEM detectors for the CMS GE1/1 muon upgrade
/ Abbas, M. (KIT, Karlsruhe) ; Abbrescia, M. (Bari Polytechnic ; INFN, Bari) ; Abdalla, H. (Ain Shams U., Cairo ; American U., Cairo) ; Abdelalim, A. (Ain Shams U., Cairo ; British U. in Egypt) ; AbuZeid, S. (Ain Shams U., Cairo) ; Agapitos, A. (Peking U.) ; Ahmad, A. (NCP, Islamabad) ; Ahmed, A. (Delhi Tech. U.) ; Ahmed, W. (NCP, Islamabad) ; Aimè, C. (Pavia U. ; INFN, Pavia) et al.
The series of upgrades to the Large Hadron Collider, culminating in the High Luminosity Large Hadron Collider, will enable a significant expansion of the physics program of the CMS experiment. However, the accelerator upgrades will also make the experimental conditions more challenging, with implications for detector operations, triggering, and data analysis. [...]
arXiv:2203.12037.-
2022-07-01 - 45 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1034 (2022) 166716
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