Speaker
Description
The Compact Muon Solenoid (CMS) detector at the European Council for Nuclear Research (CERN) Large Hadron Collider (LHC) is undergoing an extensive Phase II upgrade program to prepare for the challenging conditions of the high-luminosity LHC (HL-LHC). In particular, a new timing layer will measure minimum ionizing particles (MIPs) with a time resolution of ∼30–40 ps and hermetic coverage up to a pseudorapidity of |η| = 3. The precision time information from this detector will reduce the effects of the high levels of pileup expected at the HL-LHC and will bring new and unique capabilities to the CMS detector. This MIP Timing Detector (MTD) will consist of a central barrel timing layer (BTL) based on L(Y)SO:Ce crystals read out with silicon photomultipliers (SiPMs) and two end-caps layer (ETL) instrumented with radiation-tolerant low-gain avalanche detectors (LGADs). We present the current status and ongoing R&D of the ETL, including recent test beam results in this talk.
