The ATLAS Trigger System Commissioning and Performance
A. Hamilton (the ATLAS Collaboration)

TL;DR
This paper reviews the commissioning, performance, and evolution of the ATLAS trigger system during early LHC runs at various energies, highlighting its successful data collection and future plans.
Contribution
It provides a comprehensive overview of the ATLAS trigger system's commissioning, performance assessment, and adaptation to increasing luminosity during initial LHC operations.
Findings
Successful collection of collision data at multiple energies
Trigger system performance optimized through extensive online testing
Plans outlined for future LHC running and trigger improvements
Abstract
The ATLAS trigger has been used very successfully to collect collision data during 2009 and 2010 LHC running at centre of mass energies of 900 GeV, 2.36 TeV, and 7 TeV. This paper presents the ongoing work to commission the ATLAS trigger with proton collisions, including an overview of the performance of the trigger based on extensive online running. We describe how the trigger has evolved with increasing LHC luminosity and give a brief overview of plans for forthcoming LHC running.
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Taxonomy
TopicsParticle Detector Development and Performance · Particle physics theoretical and experimental studies · High-Energy Particle Collisions Research
