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The CMS ECAL Upgrade for Precision Crystal Calorimetry at the HL-LHC
, Article IEEE Transactions on Nuclear Science ; Volume 65, Issue 8 , 2018 , Pages 2004-2006 ; 00189499 (ISSN) ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2018
Abstract
The Compact Muon Solenoid (CMS) experiment is operating at the Large Hadron Collider (LHC) with proton-proton collisions at 13-TeV center-of-mass energy and at a bunch spacing of 25 ns. Challenging running conditions for CMS are expected after the High-Luminosity upgrade of the LHC (HL-LHC). We review the CMS ECAL crystal calorimeter upgrade and present results from the first test beam studies. Particular challenges at HL-LHC are the harsh radiation environment, the increasing data rates, and the extreme level of pile-up events, with up to 200 simultaneous proton-proton collisions. Precision timing can be exploited to reduce the effect of the pileup. We report on the timing resolution...