N. Barros

The ATLAS experience with databases for structured data with temporal and hierarchical order

Developing systems for the ATLAS (A Toroidal LHC ApparatuS) detector at LHC poses a new set of challenges like the storage of enormous amounts of data with different structures. This data is not only traditional Conditions Data which is slowly evolving data but also data from the online systems which cannot be stored with the event data but must be accessible from each event, like run information. Following the requirements from such systems we have developed a system which provides the facility to store structural data in a time order and with the possibility to classify hierarchically. We will also present a case study of use in the online systems of the ATLAS experiment where this system was used to store online data. Furthermore, we will show the different interfaces developed for this system and its use in different areas of application

Photon detector system timing performance in the DUNE 35-ton prototype liquid argon time projection chamber

The 35-ton prototype for the Deep Underground Neutrino Experiment far detector was a single-phase liquid argon time projection chamber with an integrated photon detector system, all situated inside a membrane cryostat. The detector took cosmic-ray data for six weeks during the period of February 1, 2016 to March 12, 2016. The performance of the photon detection system was checked with these data. An installed photon detector was demonstrated to measure the arrival times of cosmic-ray muons with a resolution better than 32 ns, limited by the timing of the trigger system. A measurement of the timing resolution using closely-spaced calibration pulses yielded a resolution of 15 ns for pulses at a level of 6 photo-electrons. Scintillation light from cosmic-ray muons was observed to be attenuated with increasing distance with a characteristic length of

The ATLAS Experience With Databases for Structured Data With Temporal and Hierarchical Order

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The WEB interface for the ATLAS/LCG MySQL Conditions Databases and performance constraints in the visualisation of extensive scientific/technical data

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Deployment and Use of the ATLAS DAQ in the Combined Test Beam

Developing systems for the A Turoidal LHC Aparattus (ATLAS) detector at LHC poses a new set of challenges like the storage of great amounts of data with different structures. This data can be not only from the conditions data which is slowly evolving data but also data from the online systems which cannot be stored with the event data and must be accessible from each event. Following the requirements from such systems we have developed a system which provides the facility to store data with structure in a temporal evolution and with the possibility to classify in a hierarchical order. We will also make a case study of use in the online systems of the ATLAS experiment where this system was used to store online data. Furthermore, we will expose the different interfaces developed for this system and its use in different areas of application