CERN Accelerating science

ATLAS Note
Report number	ATL-DAQ-PROC-2021-003
Title	The Controls and Configuration Software of the ATLAS Data Acquisition System: evolution towards LHC Run 3
Author(s)	Kazarov, Andrei (Petersburg Nuclear Physics Institute) ; Chitan, Adrian (Horia Hulubei National Institute of Physics and Nuclear Engineering) ; Kazymov, Andrei (Joint Institute for Nuclear Research) ; Corso-Radu, Alina (University of California, Irvine) ; Aleksandrov, Igor (Joint Institute for Nuclear Research) ; Soloviev, Igor (University of California, Irvine) ; Avolio, Giuseppe (European Laboratory for Particle Physics, CERN) ; Vasile, Matei Eugen (Horia Hulubei National Institute of Physics and Nuclear Engineering) ; Mineev, Mikhail (Joint Institute for Nuclear Research)
Collaboration	ATLAS Collaboration
Publication	2021
Imprint	15 Jun 2021
Number of pages	9
In:	EPJ Web Conf. 251 (2021) 04019
In:	25th International Conference on Computing in High-Energy and Nuclear Physics (CHEP), Online, Online, 17 - 21 May 2021, pp.04019
DOI	10.1051/epjconf/202125104019
Subject category	Particle Physics - Experiment ; Computing and Computers
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	controls ; experiment ; configuration ; software ; automation ; architecture ; design ; web
Abstract	The ATLAS experiment at the Large Hadron Collider (LHC) op- erated 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 shut- down (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	Slides ATL-DAQ-SLIDE-2021-155
Copyright/License	publication: © 2021-2024 The Authors (License: CC-BY-4.0)

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