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Faster simulated track reconstruction in the ATLAS Fast Chain
The production of simulated datasets for use by physics analyses consumes a large fraction of ATLAS computing resources, a problem that will only get worse as increases in the instantaneous luminosity provided by the LHC lead to more collisions per bunch crossing (pile-up). One of the more resource-...
Autores principales: | , , , , , |
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Lenguaje: | eng |
Publicado: |
2023
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Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2871922 |
_version_ | 1780978574742781952 |
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author | Leight, William Axel Tsai, Fang-Ying Javurkova, Martina Golling, Tobias Chapman, John Derek Sengupta, Debajyoti |
author_facet | Leight, William Axel Tsai, Fang-Ying Javurkova, Martina Golling, Tobias Chapman, John Derek Sengupta, Debajyoti |
author_sort | Leight, William Axel |
collection | CERN |
description | The production of simulated datasets for use by physics analyses consumes a large fraction of ATLAS computing resources, a problem that will only get worse as increases in the instantaneous luminosity provided by the LHC lead to more collisions per bunch crossing (pile-up). One of the more resource-intensive steps in the Monte Carlo production is reconstructing the tracks in the ATLAS Inner Detector, which takes up about 60% of the total detector reconstruction time. This talk discusses a novel technique called track overlay, which substantially speeds up the Inner Detector reconstruction. In track overlay the pile-up Inner Detector tracks are reconstructed ahead of time and overlaid onto the Inner Detector tracks from the simulated hard-scatter event. We present our implementation of this track overlay approach as part of the ATLAS Fast Chain simulation, as well as a method for deciding in which cases it is possible to use track overlay in the reconstruction of simulated data without performance degradation, and in which it is preferable to use the current approach. |
id | cern-2871922 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2023 |
record_format | invenio |
spelling | cern-28719222023-09-21T20:54:28Zhttp://cds.cern.ch/record/2871922engLeight, William AxelTsai, Fang-YingJavurkova, MartinaGolling, TobiasChapman, John DerekSengupta, DebajyotiFaster simulated track reconstruction in the ATLAS Fast ChainParticle Physics - ExperimentThe production of simulated datasets for use by physics analyses consumes a large fraction of ATLAS computing resources, a problem that will only get worse as increases in the instantaneous luminosity provided by the LHC lead to more collisions per bunch crossing (pile-up). One of the more resource-intensive steps in the Monte Carlo production is reconstructing the tracks in the ATLAS Inner Detector, which takes up about 60% of the total detector reconstruction time. This talk discusses a novel technique called track overlay, which substantially speeds up the Inner Detector reconstruction. In track overlay the pile-up Inner Detector tracks are reconstructed ahead of time and overlaid onto the Inner Detector tracks from the simulated hard-scatter event. We present our implementation of this track overlay approach as part of the ATLAS Fast Chain simulation, as well as a method for deciding in which cases it is possible to use track overlay in the reconstruction of simulated data without performance degradation, and in which it is preferable to use the current approach.ATL-SOFT-PROC-2023-036oai:cds.cern.ch:28719222023-09-21 |
spellingShingle | Particle Physics - Experiment Leight, William Axel Tsai, Fang-Ying Javurkova, Martina Golling, Tobias Chapman, John Derek Sengupta, Debajyoti Faster simulated track reconstruction in the ATLAS Fast Chain |
title | Faster simulated track reconstruction in the ATLAS Fast Chain |
title_full | Faster simulated track reconstruction in the ATLAS Fast Chain |
title_fullStr | Faster simulated track reconstruction in the ATLAS Fast Chain |
title_full_unstemmed | Faster simulated track reconstruction in the ATLAS Fast Chain |
title_short | Faster simulated track reconstruction in the ATLAS Fast Chain |
title_sort | faster simulated track reconstruction in the atlas fast chain |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/2871922 |
work_keys_str_mv | AT leightwilliamaxel fastersimulatedtrackreconstructionintheatlasfastchain AT tsaifangying fastersimulatedtrackreconstructionintheatlasfastchain AT javurkovamartina fastersimulatedtrackreconstructionintheatlasfastchain AT gollingtobias fastersimulatedtrackreconstructionintheatlasfastchain AT chapmanjohnderek fastersimulatedtrackreconstructionintheatlasfastchain AT senguptadebajyoti fastersimulatedtrackreconstructionintheatlasfastchain |