The High-Level-Trigger Steering of the ATLAS Experiment

Berger, N.; Bold, T.; Eifert, Till; Fischer, G.; George, S.; Haller, J.; Hoecker, A.; Masik, J.; zur Nedden, M.; Perez Reale, V.; Risler, C.; Schiavi, C.; Stelzer, J.; Wu, Xin

doi:10.1109/TNS.2007.913483

Scientific article

English

The High-Level-Trigger Steering of the ATLAS Experiment

Contributors

Berger, N.; Bold, T.; Eifert, Till; Fischer, G.; George, S.; Haller, J.; Hoecker, A.; Masik, J.; zur Nedden, M.; Perez Reale, V.; Risler, C.; Schiavi, C.; Stelzer, J.; Wu, Xin

Published in

IEEE transactions on nuclear science, vol. 55, no. 1, p. 165-171

Publication date

2008

Abstract

The ATLAS experiment at the Large Hadron Collider (LHC) will face the challenge of efficiently selecting interesting candidate events in pp collisions at 14 TeV centre-of-mass energy, whilst rejecting the enormous number of background events. The High-Level-Trigger (HLT second level trigger and Event Filter), which is a software based trigger will need to reduce the first level trigger output rate of kHz to Hz written out to mass storage. In this paper an overview of the steering mechanism of the HLT is given. The HLT Steering is responsible for the scheduling of algorithms and for the global event trigger decision evaluation. The concept of step-wise and seeded selection strategy implemented by the steering will be presented. Integration of large number of trigger menus and sophisticated physics selection strategies will also be discussed. The electron and photon menus will be described to demonstrate that the trigger is well adapted for the physics program at the LHC.

Keywords

ATLAS
High level trigger
LHC.

UNIGE affiliation entities

Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Citation (ISO format)

BERGER, N. et al. The High-Level-Trigger Steering of the ATLAS Experiment. In: IEEE transactions on nuclear science, 2008, vol. 55, n° 1, p. 165–171. doi: 10.1109/TNS.2007.913483

Article (Published version)

Identifiers

PID : unige:39010
DOI : 10.1109/TNS.2007.913483

Additional URL for this publication

http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=4448451

Journal ISSN

0018-9499

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The High-Level-Trigger Steering of the ATLAS Experiment

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Published in

Publication date

Abstract

Keywords

UNIGE affiliation entities

Citation (ISO format)

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Technical informations

Creation

First validation

Update

Status update

Last indexation