NDLI: Operational experience of the ATLAS high level trigger with single-beam and cosmic rays

Content Provider	IEEE Xplore Digital Library
Author	Aracena, I.
Copyright Year	2009
Description	Author affiliation: (SLAC National Accelerator Laboratory) on behalf of the ATLAS collaboration (Aracena, I.)
Abstract	ATLAS is one of two general-purpose detectors at the LHC. Using fast reconstruction algorithms, the trigger system needs to efficiently reject a large rate of background events while keeping potentially interesting ones with high efficiency. The LHC start up and single-beam run periods in 2008 provided a ”stress test” of the trigger system. Following this period, ATLAS continued to collect cosmic-ray events for detector alignment and calibration as well as for commissioning the trigger. These running periods allowed us to exercise the trigger system online, including its configuration and monitoring infrastructure, as well as reconstruction and selection algorithms. Several tracking, muon-finding, and calorimetry algorithms were commissioned under different running conditions. Frequent changes of the trigger configuration were required to cope with the parallel commissioning of the ATLAS sub-detectors. The experience gained while running the trigger system online was very valuable to design and implement an optimal strategy for the collision data taking period of 2009. This paper focuses on the operational experience gained in running the trigger in the fast-changing environment of the detector commissioning with cosmic rays and single beam runs.
Starting Page	219
Ending Page	222
File Size	596930
Page Count	4
File Format	PDF
ISBN	9781424439614
ISSN	10957863
DOI	10.1109/NSSMIC.2009.5401792
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cosmic rays Detectors Large Hadron Collider Mesons Event detection Relational databases Nuclear and plasma sciences Laboratories Collaboration Reconstruction algorithms
Content Type	Text
Resource Type	Article

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Commissioning of the ATLAS High Level Trigger with single LHC beam and cosmic rays

Commissioning of the ATLAS High-Level Trigger With Single LHC Beam and Cosmic Rays

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