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T: Fachverband Teilchenphysik

T 86: Kalorimeter

T 86.5: Vortrag

Donnerstag, 22. März 2018, 17:35–17:50, Z6 - SR 2.002

The CMS High Granularity Calorimeter for the HL-LHC: Online Trigger and Particle Identification — •Luca Mastrolorenzo — RWTH III. Physikalisches Institut A, Aachen, Germany

The HL-LHC will pose significant challenges for radiation tolerance and event pileup on detectors, especially for forward calorimetry, hallmarking the issue for future colliders. As part of the Phase-II upgrade, the CMS collaboration envisages the complete replacement of the endcap calorimeters with the HGCAL detector. Based on silicon technology, HGCAL features unprecedented transverse and longitudinal segmentation. This will improve the event reconstruction, allowing to maximally exploit the particle-flow (PF) calorimetry. The intrinsic high-precision timing capabilities of the silicon sensors will add an extra dimension to the event reconstruction, especially in terms of pileup rejection. In parallel, the hardware (L1) trigger system will be subject to a deep upgrade to increase the sustainable rate up to O(750 kHz). A main challenge is represented by the design of the HGCAL L1 trigger architecture: it must be capable to exploit the high granularity to enhance the pileup rejection and particle identification, whilst still achieving good energy resolution and pioneering PF-based techniques at L1.