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A Method for a Level 2 Muon Trigger for ATLAS.

A method for a level 2 trigger for the ATLAS muon system in the region 0 < eta 2 is described. The methodd is based on pattern recognition in both the triggerand monitored drift tube chambers and a reconstruction algorithm for the MDT system.The MDT pattern recognition algorithm uses a type of Ho...

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Detalles Bibliográficos
Autores principales: Baytch, N, Caram, A, Shank, J T, Slowe, C, Taylor, F, Zhou, B
Lenguaje:eng
Publicado: 1998
Materias:
Acceso en línea:http://cds.cern.ch/record/683776
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author Baytch, N
Caram, A
Shank, J T
Slowe, C
Taylor, F
Zhou, B
author_facet Baytch, N
Caram, A
Shank, J T
Slowe, C
Taylor, F
Zhou, B
author_sort Baytch, N
collection CERN
description A method for a level 2 trigger for the ATLAS muon system in the region 0 < eta 2 is described. The methodd is based on pattern recognition in both the triggerand monitored drift tube chambers and a reconstruction algorithm for the MDT system.The MDT pattern recognition algorithm uses a type of Hough tranform to measurethe adjacency of candidate tracks and a chi-squared test to select and refine MDT candidate tracks. The trigger momentum is estimated by comparing the radius ofcurvature for the reconstructed MDT track within a trigger road with a linear interpolationof nearly mathcing tracks read from a fast lookup table. The performance of the algorithm under a random noise background is simulated. Resolutions of order5% and 10% by Gaussian fits are achieved for 20 GeV and 6 GeV Pt muon tracksrespectively with an overall reconstruction efficiency of > 97%.
id cern-683776
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
record_format invenio
spelling cern-6837762019-09-30T06:29:59Zhttp://cds.cern.ch/record/683776engBaytch, NCaram, AShank, J TSlowe, CTaylor, FZhou, BA Method for a Level 2 Muon Trigger for ATLAS.Detectors and Experimental TechniquesA method for a level 2 trigger for the ATLAS muon system in the region 0 < eta 2 is described. The methodd is based on pattern recognition in both the triggerand monitored drift tube chambers and a reconstruction algorithm for the MDT system.The MDT pattern recognition algorithm uses a type of Hough tranform to measurethe adjacency of candidate tracks and a chi-squared test to select and refine MDT candidate tracks. The trigger momentum is estimated by comparing the radius ofcurvature for the reconstructed MDT track within a trigger road with a linear interpolationof nearly mathcing tracks read from a fast lookup table. The performance of the algorithm under a random noise background is simulated. Resolutions of order5% and 10% by Gaussian fits are achieved for 20 GeV and 6 GeV Pt muon tracksrespectively with an overall reconstruction efficiency of > 97%.ATL-DAQ-99-003oai:cds.cern.ch:6837761998-12-11
spellingShingle Detectors and Experimental Techniques
Baytch, N
Caram, A
Shank, J T
Slowe, C
Taylor, F
Zhou, B
A Method for a Level 2 Muon Trigger for ATLAS.
title A Method for a Level 2 Muon Trigger for ATLAS.
title_full A Method for a Level 2 Muon Trigger for ATLAS.
title_fullStr A Method for a Level 2 Muon Trigger for ATLAS.
title_full_unstemmed A Method for a Level 2 Muon Trigger for ATLAS.
title_short A Method for a Level 2 Muon Trigger for ATLAS.
title_sort method for a level 2 muon trigger for atlas.
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/683776
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