Speaker
Fabrizio Miano
(University of Sussex (GB))
Description
LHC Run 2 presents challenging high rate conditions for data analysis and processing within
the ATLAS trigger systems. The ATLAS Inner Detector (ID) trigger implements the algorithms
used for identification of tracks in nearly all physics signatures within the ATLAS trigger.
The ID trigger was updated and redesigned during the 2013-2015 long shutdown to meet the
challenging conditions of Run 2. As well, for Run 2 a new pixel detector layer was added in very
close proximity to the beam pipe, which enhances the ID Trigger performance. The redesigned
ID trigger algorithms for Run 2 are described, illustrating the significant improvements gained
by the new tracking strategies adopted to deal with the increased rate. Performance of the ID
trigger in Run 2 is shown in terms of algorithm timing, efficiency and resolution, using data
collected by ATLAS in Run 2. The ID trigger continues to show excellent performance, with
efficiencies greater than 99%, and track reconstruction times well within the required latency
budget.
Primary author
Collaboration ATLAS
(ATLAS)
