Design and implementation of the ATLAS detector control system

An overview of the Conditions Database (DB) structure for the hadronic Tile Calorimeter (TileCal), one of the sub-systems of the ATLAS detector at LHC, is presented. ATLAS Conditions DB stores the data on the ORACLE backend, and the design and implementation have been developed using the COOL (Conditions Objects for LCG) software package as a common persistency solution for the storage and management of the conditions data. TileCal conditions and calibration data are stored in 4 separate Databases, each with its own schema: TileCal Online and Offline DBs for data, DB for Monte Carlo simulation and Detector Control System (DCS) DB. In order to ensure smooth operation of the TileCal during data taking, experts perform the necessary calibrations, add the changes of detector status and other conditions data, prepare new conditions for data reprocessing and Monte Carlo production campaigns, and upload the new up-to-date information into DB using custom-made software tools. The procedure of TileCal conditions’ preparation, validation, uploading to DBs is described, and some DB-related statistics collected in Run 2 is presented.

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The Detector Control System for the magnetic field sensors in New Small Wheel phase I upgrade of ATLAS detector

Journal of Physics Conference Series ◽

10.1088/1742-6596/2105/1/012026 ◽

2021 ◽

Vol 2105 (1) ◽

pp. 012026

Author(s):

Stamatios Tzanos

Keyword(s):

Magnetic Field ◽

Control System ◽

Hadron Collider ◽

Atlas Detector ◽

Magnetic Field Sensors ◽

Atlas Experiment ◽

Data Rates ◽

Level 1 ◽

The Magnetic Field ◽

Detector Control System

Abstract In conjunction with the High Luminosity upgrade of the Large Hadron Collider accelerator at CERN, the ATLAS detector is also undergoing an upgrade to handle the significantly higher data rates. The muon end-cap system upgrade in ATLAS, lies with the replacement of the Small Wheel. The New Small Wheel (NSW) is expected to combine high tracking precision with upgraded information for the Level-1 trigger. To accomplish this, small Thin Gap Chamber (sTGC) and MicroMegas detector technologies are being deployed. Due to their installation location in ATLAS, the effects of Barrel Toroid and End-Cap Toroid magnets on NSW must be measured. For the final experiment at ATLAS, each sTGC large double wedge will be equipped with magnetic field Hall effect sensors to monitor the magnetic field near the NSW. The readout is done with an Embedded Local Monitor Board (ELMB) called MDT DCS Module (MDM). For the integration of this hardware in the experiment, first, a detector control system was developed to test the functionality of all sensors before their installation on the detectors. Subsequently, another detector control system was developed for the commissioning of the sensors. Finally, a detector control system based on the above two is under development for the expert panels of ATLAS experiment. In this paper, the sensor readout, the connectivity mapping and the detector control systems will be presented.

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