Göttingen 2025 – scientific programme

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T: Fachverband Teilchenphysik

T 34: Data, AI, Computing, Electronics IV (DAQ, Detector Electronics)

T 34.5: Talk

Tuesday, April 1, 2025, 17:15–17:30, VG 2.102

DAQ software for QC-tests of ATLAS ITk-Pixel loaded local supports — Jörn Große-Knetter, •Paolo Malatesta, Arnulf Quadt, and Ali Skaf — II. Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen

The increase of luminosity at the ATLAS Large Hadron Collider (LHC), previewed in the phase 2 upgrade, will require an update of the ATLAS inner detector. A new all-silicon Inner Tracker (ITk) will be deployed resulting in an increased data rate. The 5 billion pixels comprise over 9,000 Quad Modules (QMs), which are managed by the DAQ system via FELIX hardware/software. In the ITk outer barrel, QMs send 1.28 Gb/s electrical signals to the Optoboard for conversion to optical signals, which are then transmitted off-detector to FELIX PCs and the DAQ software. The reverse path is used for QM Front-End (FE) configuration and control. To validate the DAQ system's readiness for the upgrade, a lab setup reproducing the FELIX/optoboard readout chain was tested with preproduction QMs using serial powering. Simultaneous readout enabled analysis of system behaviour under load, identifying key parameters for signal quality and reliability. DAQ performance, including configuration time, was measured as a function of enabled FEs, providing insights crucial for scaling the DAQ chain to large systems like the local supports loaded with few 10 modules and the full ITk-pixel DAQ.

Keywords: FELIX Readout chain; ATLAS DAQ upgrade; ITk-Pixel; Optoboard