PoS - Proceedings of Science
Volume 450 - The Eleventh Annual Conference on Large Hadron Collider Physics (LHCP2023) - session Joint (Upgrade+Perf/Tools)
CMS Level-1 Trigger Upgrade
J.E. Palencia Cortezon*  on behalf of the CMS Collaboration
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Pre-published on: January 17, 2024
Published on:
To achieve the physics goals of the High Luminosity LHC program, the CMS Phase-2 upgrade of the Level-1 trigger system utilizes modern technologies to enhance the physics selectivity already at the hardware level of the data acquisition system. The intense hadronic environment corresponding to 200 simultaneous collisions per bunch crossing, imposes serious challenges to the system requirements.
To profit from the extended coverage and increased granularity of the upgraded CMS detector, the latency of the system is extended to 12.5 $\mu$s. The use of tracking and high-granularity calorimeter information becomes possible for the first time at Level-1. The maximum output bandwidth is 750 kHz.
Modern processors are used to implement sophisticated algorithms including machine learning-based approaches to target the selection of specific final states.
DOI: https://doi.org/10.22323/1.450.0113
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