21-27 March 2009
Europe/Prague timezone

The offline Data Quality Monitoring system of the ATLAS Muon Spectrometer

23 Mar 2009, 08:00


Prague Congress Centre 5. května 65, 140 00 Prague 4, Czech Republic
Board: Monday 040
poster Software Components, Tools and Databases Poster session


Ilektra Christidi (Physics Department - Aristotle Univ. of Thessaloniki)


The ATLAS detector has been designed to exploit the full discovery potential of the LHC proton-proton collider at CERN, at the c.m. energy of 14 TeV. Its Muon Spectrometer (MS) has been optimized to measure final state muons from those interactions with good momentum resolution (3-10% for momentum of 100GeV/c-1TeV/c). In order to ensure that the hardware, DAQ and reconstruction software of the ATLAS MS is functioning properly, Data Quality Monitoring (DQM) tools have been developed both for the online and the offline environment. The offline DQM is performed on histograms of quantities of interest which are filled in the ATLAS software framework ATHENA during different levels of processing - raw hit, reconstructed object (segment and track) and higher (physics) level. Then those histograms can be displayed and browsed by shifters and experts using various macros. They are also given as input to the Data Quality Monitoring Framework (DQMF) application, which applies simple algorithms and/or comparisons with reference histograms to set a status flag, which is propagated to a global status and saved in a database. A web display of DQMF results is also available. This initial processing is done on a subset of data (express stream) within a few hours of the run, and depending on the data quality, the whole statistics are then processed. The offline muon DQM structure and content, as well as the corresponding tools developed, are presented, with examples from the commissioning of the MS with cosmic rays.

Primary author

Ilektra Christidi (Physics Department - Aristotle Univ. of Thessaloniki)


Arely Cortes (University of Illinois Urbana-Champaign) Dimitris Iliadis (Physics Department - Aristotle Univ. of Thessaloniki) Ioannis Nomidis (Physics Department - Aristotle Univ. of Thessaloniki) Justin Griffiths (University of Washington) Nectarios Benekos (University of Illinois Urbana-Champaign) Orin Harris (University of Washington)

Presentation Materials