Performance of prototype GE1 ∕1 chambers for the CMS muon spectrometer upgrade
作者： M Abbas , M Abbrescia , H Abdalla , S Abu Zeid , A Agapitos
DOI: 10.1016/J.NIMA.2020.164104
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摘要: Abstract The high-luminosity phase of the Large Hadron Collider (HL-LHC) will result in ten times higher particle background than measured during first LHC operation. In order to fully exploit highly-demanding operating conditions HL-LHC, Compact Muon Solenoid (CMS) Collaboration use Gas Electron Multiplier (GEM) detector technology. technology be integrated into innermost region forward muon spectrometer CMS as an additional station called GE1 ∕ 1. primary purpose this auxiliary is help reconstruction and control level-1 trigger rates pseudo-rapidity 1 . 6 ≤ | η 2 new contain trapezoidal-shaped GEM detectors chambers. design these chambers finalized, installation progress Long Shutdown two (LS-2) that started 2019. Several full-size prototypes were built operated successfully various test beams at CERN. We describe performance measurements such gain, efficiency, time resolution prototype chambers, developed after years R&D, summarize their behavior different gas compositions a function applied voltage.
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