Erlangen 2026 – scientific programme

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T: Fachverband Teilchenphysik

T 73: Calorimeters I

T 73.2: Talk

Thursday, March 19, 2026, 16:30–16:45, KH 01.012

Ensuring Quality of High Granularity Calorimeter Tileboards for the High-Luminosity upgrade of CMS — •Faruk Kurtulus — University of Hamburg Mittelweg 177, 20148 Hamburg, Germany — Deutsches Elektronen-Synchrotron (DESY) Notkestraße 85, 22607 Hamburg, Germany

The CMS experiment is preparing for an upgrade to operate in the harsh environment of the High-Luminosity Large Hadron Collider (HL-LHC). To function reliably under these conditions, CMS must replace its current end-cap calorimeters, which are already losing detection capability, with the High Granularity Calorimeter (HGCAL), designed to withstand the increased luminosity and pile-up of HL-LHC operation.

In the lower-radiation region of HGCAL, the SiPM-on-Tile technology is used, coupling Silicon Photo-Multipliers (SiPMs) to thin scintillator tiles. SiPMs are soldered onto a common PCB with readout electronics and later combined with scintillators to form a Tilemodule. Before scintillators are installed, the unit is referred to as a Tileboard. Each Tileboard hosts one or two readout chips providing readout for 72 channels. The detector will contain about 3800 Tileboards. Before Tilemodule assembly, a quality-control (QC) procedure is required to verify electrical functionality and readout stability.

This presentation will outline the QC procedure developed for Tileboard certification, including the sequence of tests and qualification criteria. Results from several hundred production boards will be shown, highlighting common issues and the overall readiness of Tileboards for the HGCAL upgrade.

Keywords: High Granularity Calorimeter; Quality control; Tileboards; HGCAL; CMS