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T: Fachverband Teilchenphysik

T 67: Myon Detectors

T 67.1: Group Report

Wednesday, March 23, 2022, 16:15–16:35, T-H26

DT upgrade activities during LHC long shutdown II and readiness status for Run 3 — •Archana Sharma, Thomas Hebbeker, Kerstin Hoepfner, Hans Reithler, Markus Merschmeyer, and Dmitry Eliseev — III. Physikalisches Institut A, RWTH Aachen University

After delivering an integrated luminosity of more than 160/fb until the end of Run 2, at the beginning of 2019, LHC was shut down until the end of 2021 (LS2) in order to get its accelerator-chain and detectors upgraded for the HL-LHC phase, expected to deliver an instantaneous luminosity 5 times higher with respect to the present value. During this LS2, the Compact Muon Solenoid (CMS) experiment worked to upgrade its electronics and detector performance to improve the data taking and a precise reconstruction of all the particles in high pile-up conditions of HL-LHC. Drift Tubes (DT) detectors equip the CMS muon system barrel region, serving both as offline tracking and triggering devices. An upgrade of the current readout and trigger electronics is also planned in order to withstand event rates and integrated doses far beyond the initial design specification expected in HL-LHC. During LS2, prototypes of the new electronics were installed in four DT chambers with the same azimuthal acceptance, instrumenting a demonstrator of the HL-LHC DT upgrade (DT slice-test). This report briefly summarises the commissioning activities performed during LS2, along with the status of the slice-test and its performance with cosmic -ray events.

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