ATLAS data quality operations and performance for 2015-2018 data-taking

Understand

The ATLAS detector at the Large Hadron Collider reads out particle collision data from over 100 million electronic channels at a rate of approximately $100$ kHz, with a recording rate for physics events of approximately 1 kHz.

• Before being certified for physics analysis at computer centres worldwide, the data must be scrutinised to ensure they are clean from any hardware or software related issues that may compromise their integrity.
• Prompt identification of these issues permits fast action to investigate, correct and potentially prevent future such problems that could render the data unusable.
• This is achieved through the monitoring of detector-level quantities and reconstructed collision event characteristics at key stages of the data processing chain.