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The performance and development for the Inner Detector Trigger algorithms at ATLAS
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SYSNO ASEP 0456770 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title The performance and development for the Inner Detector Trigger algorithms at ATLAS Author(s) Penc, Ondřej (FZU-D) ORCID Source Title Journal of Physics: Conference Series. Vol. 608. - Bristol : IOP Publishing Ltd., 2015 - ISSN 1742-6588 Pages s. 012008 Number of pages 6 s. Publication form Print - P Action 16th International Workshop on Advanced Computing and Analysis Techniques in Physics Research: Bridging Disciplines, ACAT 2014; Event date 01.09.2014 - 05.09.2014 VEvent location Prague Country CZ - Czech Republic Event type WRD Language eng - English Country GB - United Kingdom Keywords CERN ; ATLAS ; performance ; Inner Detector ; Trigger algorithms Subject RIV BF - Elementary Particles and High Energy Physics R&D Projects LG13009 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 UT WOS 000358218000008 EID SCOPUS 84937869481 DOI 10.1088/1742-6596/608/1/012008 Annotation A redesign of the tracking algorithms for the ATLAS trigger for LHC's Run 2 starting in 2015 is in progress. The ATLAS HLT software has been restructured to run as a more flexible single stage HLT, instead of two separate stages (Level 2 and Event Filter) as in Run 1. The new tracking strategy employed for Run 2 will use a Fast Track Finder (FTF) algorithm to seed subsequent Precision Tracking, and will result in improved track parameter resolution and faster execution times than achieved during Run 1. The performance of the new algorithms has been evaluated to identify those aspects where code optimisation would be most beneficial. The performance and timing of the algorithms for electron and muon reconstruction in the trigger are presented. The profiling infrastructure, constructed to provide prompt feedback from the optimisation, is described, including the methods used to monitor the relative performance improvements as the code evolves. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2016
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