PoS - Proceedings of Science
Volume 398 - The European Physical Society Conference on High Energy Physics (EPS-HEP2021) - T12: Detector R&D and Data Handling
CMS MTD Barrel Timing Layer: Precision Timing at the HL-LHC
B. Marzocchi
Full text: Not available
Abstract
The Compact Muon Solenoid (CMS) detector at the 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). A new timing detector in CMS will measure minimum
ionizing particles (MIPs) with a time resolution of 30-40 ps for MIP signals at a rate of 2.5 Mhit/s
per channel at the beginning of HL-LHC operation. The precision time information from this
MIP Timing Detector (MTD) will reduce the effects of the high levels of pileup expected at the
HL-LHC, bringing new capabilities to the CMS detector. The barrel timing layer (BTL) of the
MTD will use sensors that are based on LYSO:Ce scintillation crystals coupled to SiPMs with
TOFHIR ASICs for the front-end readout. In this talk we will present motivations for precision
timing at the HL-LHC and an overview of the MTD BTL design, including ongoing R&D studies
targeting enhanced timing performance and radiation tolerance.
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