Erlangen 2026 – scientific programme

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T: Fachverband Teilchenphysik

T 33: Silicon Detectors IV

T 33.8: Talk

Tuesday, March 17, 2026, 18:00–18:15, KH 01.022

Development of an automated ATLAS pixel detector monitoring website — Marcello Bindi, Arnulf Quadt, and •Tim Schlömer — II. Physikalisches Institut, Georg-August-Universität Göttingen

The ATLAS Pixel Detector records charged particles through the ionisation charge they deposit as they traverse the sensor. A hit is recorded when the collected charge exceeds a programmable threshold, and the corresponding time-over-threshold (TOT) provides an estimate of the deposited charge. The threshold and TOT response are periodically re-tuned to maintain their target values, which drift with accumulated luminosity due to radiation-induced degradation. It is therefore essential to continuously monitor the key operational parameters like charge threshold, TOT, digital-to-analogue converter settings, the number of masked pixels, and the number of disabled columns. Tracking their evolution as a function of time and integrated luminosity is crucial both for ensuring optimal detector performance and contributing to radiation-damage studies.

A dedicated web-based framework presents these operational parameters through a set of automatically updated plots and summary metrics. Following each detector tuning, an automated pipeline refreshes the displayed results while preserving previous versions for reference. The framework also enables users to visualise long-term trends in critical parameters and to compare tunings from different periods of the detector*s operational lifetime.

Keywords: Pixel; Operation Monitoring