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T: Fachverband Teilchenphysik

T 63: Detectors 6 (calorimeters)

T 63.7: Vortrag

Mittwoch, 6. März 2024, 17:30–17:45, Geb. 30.23: 2/1

Quality control of the pre-series scintillator tiles of the High Granularity Calorimeter upgrade of the CMS experiment — •Daria Selivanova — Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany

As the High Luminosity era of LHC approaches, it is important to finalise production techniques for the components of the upgrades of the collider experiments and CMS is no exception. The CMS endcap calorimeters are getting a high granularity upgrade (HGCAL), which promises to improve energy resolution by reducing background via pileup rejection. This is done through use of both intrinsic timing capabilities of the sensors and front-end electronics design as well as unprecedented transverse and longitudinal segmentation. HGCAL consists of electromagnetic and hadronic compartments, the latter of which is divided into two by the different technologies used in its construction. One of them, SiPM-on-tile, will make up ~250 000 channels: scintillator tiles optically coupled to SiPMs soldered onto a PCB with readout electronics. All of such channels will need to withstand harsh radiation conditions of HL-LHC to be able to continue with physics searches until the end of life (integrated luminosity ~ 3000 fb-1) and even beyond. Assurance of that is tackled by the Tile Assembly Center (TAC) at DESY performing quality control (QC) checks for all components of the SiPM-on-tile section of the HGCAL. Results of QC of scintillator tiles are discussed. Tiles under investigation are pre-series tiles the study of which aids the finalising of the production techniques. This part is essential for start and ease of the final production phase.

Keywords: LHC Phase-2 Upgrade; High Granularity Calorimeter; Quality control; Scintillator tiles; SiPM-on-tile technology