CONICET | Buscador de Institutos y Recursos Humanos

The ATLAS detector at the Large Hadron Collider reads out particle collision data fromover 100 million electronic channels at a rate of approximately 100 kHz, with a recordingrate for physics events of approximately 1 kHz. Before being certified for physics analysis atcomputer centres worldwide, the data must be scrutinised to ensure they are clean from anyhardware or software related issues that may compromise their integrity. Prompt identificationof these issues permits fast action to investigate, correct and potentially prevent future suchproblems that could render the data unusable. This is achieved through the monitoring ofdetector-level quantities and reconstructed collision event characteristics at key stages of thedata processing chain. This paper presents the monitoring and assessment procedures inplace at ATLAS during 2015?2018 data-taking. Through the continuous improvement ofoperational procedures, ATLAS achieved a high data quality efficiency, with 95.6% of therecorded proton-proton collision data collected at √s = 13 TeV certified for physics analysis.