Erlangen 2026 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 90: Calorimeters II
T 90.3: Vortrag
Freitag, 20. März 2026, 09:30–09:45, KH 00.015
Quality Control of the Tilemodules for the High Granularity Calorimeter upgrade of the CMS experiment — •Anurag Sritharan — Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
The CMS experiment will upgrade its detectors to cope with higher luminosities and collision rates during the High-Luminosity era of the LHC. One key upgrade of the CMS is the High Granularity Calorimeter (HGCAL), which will completely replace the current end-cap calorimeter. The hadronic calorimeter is split into two sections using different technologies, depending on the expected amount of radiation damage at the end of life. Where the expected fluence is below 5 × 1013 neq/cm2, the SiPM-on-Tile technology was chosen. It consists of small scintillator tiles read out by silicon photo-multipliers on a PCB, named "Tilemodule". A Tilemodule will house 1 or 2 readout chips (called HGCROCs), and each can read out 72 channels. To test and qualify the Tilemodules and the functionality of the readout chips, a robust and modular software framework for quality control has been developed. Additionally, in September 2025, 15 Tilemodules were tuned through the software framework, assembled into a stainless steel absorber stack, and tested at CERN SPS. The test setups, results, and a first look into the analysis of the calorimetric stack will be presented.
Keywords: High Granularity Calorimeter; Quality control; Tileboards; SiPM-on-tile technology; CERN testbeam