A new specialized data format for commissioning of the ATLAS experiment and physics analysis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the commissioning phase of the ATLAS experiment, lowlevel Event Summary Data (ESD) are analyzed to evaluate the performance of the individual subdetectors, the performance of the reconstruction and particle identification algorithms, and obtain calibration coefficients. In the GRID model of distributed analysis, these data must be transferred to Tier-1 and Tier-2 sites before they can be analyzed. However, the large size of ESD (∼1 MByte/event) constrains the amount of data that can be distributed on the GRID and is available on disks. In order to overcome this constraint and make the data fully available, new data formats - collectively known as Derived Physics Data (DPD) - have been designed. Each DPD format contains a subset of the ESD data, tailored to specific needs of the subdetector and object reconstruction and identification performance groups. Filtering algorithms perform a selection based on physics contents and trigger response, further reducing the data volume. Thanks to these techniques, the total volume of DPD to be distributed on the GRID amounts to 20% of the initial ESD data. An evolution of the tools developed in this context serves to produce another set of DPD s that are specifically tailored for physics analysis. All selection criteria and other relevant information is stored inside these DPD s as meta-data and a connection to external databases is also established.

Original languageEnglish
Title of host publicationIEEE Nuclear Science Symposium Conference Record
Pages494-499
Number of pages6
DOIs
Publication statusPublished - 2009
Event2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009 - Orlando, FL, United States
Duration: Oct 25 2009Oct 31 2009

Other

Other2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009
CountryUnited States
CityOrlando, FL
Period10/25/0910/31/09

Fingerprint

Physics
format
physics
metadata
Social Identification
Patient Selection
Calibration
set theory
actuators
Databases
coefficients

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

Cite this

A new specialized data format for commissioning of the ATLAS experiment and physics analysis. / Radics, B.

IEEE Nuclear Science Symposium Conference Record. 2009. p. 494-499 5401624.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Radics, B 2009, A new specialized data format for commissioning of the ATLAS experiment and physics analysis. in IEEE Nuclear Science Symposium Conference Record., 5401624, pp. 494-499, 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009, Orlando, FL, United States, 10/25/09. https://doi.org/10.1109/NSSMIC.2009.5401624
Radics, B. / A new specialized data format for commissioning of the ATLAS experiment and physics analysis. IEEE Nuclear Science Symposium Conference Record. 2009. pp. 494-499
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