CERN Accelerating science

ATLAS Slides
Report number	ATL-DAQ-SLIDE-2021-155
Title	ATLAS TDAQ Controls and Configuration software: Evolution from Run 2 to Run 3
Author(s)	Kazarov, Andrei (NRC Kurchatov Institute PNPI (RU))
Corporate author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Submitted to	25th International Conference on Computing in High-Energy and Nuclear Physics (CHEP), Online, Online, 17 - 21 May 2021
Submitted by	[email protected] on 19 May 2021
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	online ; software ; controls ; configuration ; data acquisition ; experiment
Abstract	The ATLAS experiment at the Large Hadron Collider (LHC) operated very successfully in the years 2008 to 2018, in two periods identified as Run 1 and Run 2. ATLAS achieved an overall data-taking efficiency of 94\%, largely constrained by the irreducible dead-time introduced to accommodate the limitations of the detector read-out electronics. Out of the 6\% dead-time only about 15\% could be attributed to the central trigger and DAQ system, and out of these, a negligible fraction was due to the Control and Configuration sub-system. Despite these achievements, and in order to improve even more the already excellent efficiency of the whole DAQ system in the coming Run 3, a new campaign of software updates was launched for the second long LHC shutdown (LS2). This paper presents, using a few selected examples, how the work was approached and which new technologies were introduced into the ATLAS DAQ system. Despite these being specific to this system, many solutions can be considered and adapted to different distributed DAQ systems.
Related document	Conference Paper ATL-DAQ-PROC-2021-003