Precision Timing with Low Gain Avalanche Detectors for the CMS MTD Endcap Timing Layer

The Compact Muon Solenoid (CMS) experiment at the CERN Large Hadron Collider (LHC) is undergoing an upgrade program to prepare for the upcoming High-Luminosity era of the LHC. The design of a new timing layer used to measure minimum ionizing particles (MIPs) with a time resolution of (~) 30 ps) and coverage up to pseudo-rapidity |η| = 3.0 is presented. The MIP timing detector (MTD) will be composed of a central barrel region instrumented with LYSO:Ce crystals, and two end-caps instrumented with radiation tolerant low gain avalanche detectors (LGADs). The precision timing information from the MTD will be used to reduce the effects of high pileup on object reconstruction.