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Article
Report number arXiv:2107.03621
Title Benchmarking LHC background particle simulation with the CMS triple-GEM detector
Related titleModeling the triple-GEM detector response to background particles for the CMS Experiment
Author(s) CMS Collaboration  Show all 193 authors
Publication 2021-12-16
Imprint 2021-07-08
Number of pages 19
In: JINST 16 (2021) P12026
DOI 10.1088/1748-0221/16/12/P12026
Subject category hep-ex ; Particle Physics - Experiment ; physics.ins-det ; Detectors and Experimental Techniques
Accelerator/Facility, Experiment CERN LHC ; CMS
Abstract An estimate of environmental background hit rate on triple-GEM chambers is performed using Monte Carlo (MC) simulation and compared to data taken by test chambers installed in the CMS experiment (GE1/1) during Run-2 at the Large Hadron Collider (LHC). The hit rate is measured using data collected with proton-proton collisions at 13 TeV and a luminosity of 1.5×1034 cm2 s1. The simulation framework uses a combination of the FLUKA and Geant4 packages to obtain the hit rate. FLUKA provides the radiation environment around the GE1/1 chambers, which is comprised of the particle flux with momentum direction and energy spectra ranging from 1011 to 104 MeV for neutrons, 103 to 104 MeV for γ's, 102 to 104 MeV for e±, and 101 to 104 MeV for charged hadrons. Geant4 provides an estimate of detector response (sensitivity) based on an accurate description of detector geometry, material composition and interaction of particles with the various detector layers. The MC simulated hit rate is estimated as a function of the perpendicular distance from the beam line and agrees with data within the assigned uncertainties of 10-14.5%. This simulation framework can be used to obtain a reliable estimate of background rates expected at the High Luminosity LHC.
Copyright/License publication: © 2021-2025 CERN (License: CC-BY-4.0)
preprint: (License: CC BY 4.0)



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 Record created 2021-07-15, last modified 2025-02-08


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