Erlangen 2026 – scientific programme
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T: Fachverband Teilchenphysik
T 73: Calorimeters I
T 73.1: Talk
Thursday, March 19, 2026, 16:15–16:30, KH 01.012
Quality Control of Scintillator Tiles for the CMS Endcap High Granularity Upgrade — •Mohammed Adnan Ali — University of Hamburg, Mittelweg 177, 20148 Hamburg — Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22607 Hamburg, Germany)
Preparing the CMS detector for the High-Luminosity LHC (HL-LHC) requires major upgrades, including the installation of the High Granularity Calorimeter (HGCAL) to replace the existing endcap calorimeters. In its hadronic section, plastic scintillator tiles coupled with SiPMs are used in regions exposed to moderate radiation levels.
HGCAL achieves its fine spatial resolution through the use of approximately 280,000 scintillator tiles, with sizes ranging from 2 cm2 to 30 cm2; around 160,000 of these tiles will be wrapped and quality-controlled at DESY. Each tile is individually wrapped and integrated through an automated assembly procedure, and the detector design imposes strict mechanical tolerances on their final geometry.
In this talk, I will present the quality control strategy developed at DESY, which includes micron-level dimensional checks after wrapping as well as standardized measurements of the light-yield performance. These studies are essential to ensure uniform detector response and to meet the performance requirements of the HGCAL upgrade.
Keywords: Quality Control; HGCAL; DESY; CMS; Scintillator Tiles