CERN Accelerating science

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1.
Readout software for the ALICE integrated Online-Offline (O$^2$) system / Chapeland, Sylvain (CERN) ; Costa, Filippo (CERN) /ALICE Collaboration
ALICE (A Large Ion Collider Experiment) is a heavy-ion detector studying the physics of strongly interacting matter and the quark - gluon plasma at CERN’s LHC (Large Hadron Collider). During the second long shutdown of the LHC, the ALICE detector will be upgraded to cope with an interaction rate of 50 kHz in Pb–Pb collisions, producing in the online computing system (O$^2$) a sustained input throughput of 3 TB/s. [...]
2019 - 7 p. - Published in : EPJ Web Conf. 214 (2019) 01041 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.01041
2.
Assessment of the ALICE O2 readout servers / Costa, Filippo (CERN) ; Chapeland, Sylvain (CERN) ; Alexopoulos, Konstantinos (CERN) ; Fuchs, Ulrich (CERN)
The ALICE experiment at CERN LHC (Large Hadron Collider) is undertaking a major upgrade during LHC Long Shutdown 2 in 2019-2020. The raw data input from the detector will then increase a hundredfold, up to 3.4 TB/s. [...]
2020 - 6 p. - Published in : EPJ Web Conf. 245 (2020) 01013 Fulltext from publisher: PDF;
In : 24th International Conference on Computing in High Energy and Nuclear Physics, Adelaide, Australia, 4 - 8 Nov 2019, pp.01013
3.
Commissioning of the ALICE readout software for LHC Run 3 / Chapeland, Sylvain (CERN) /ALICE Collaboration
ALICE (A Large Ion Collider Experiment) is a heavy-ion detector studying the physics of strongly interacting matter and the quarkgluon plasma at the CERN LHC (Large Hadron Collider). During the second long shut-down of the LHC, the ALICE detector was upgraded to cope with an interaction rate of 50 kHz in Pb-Pb collisions, producing in the online computing system (O2) a sustained input throughput of 3.5 TB/s.In the past years, the O2/FLP project built the new data-acquisition system capable of handling this load. [...]
2024 - 8 p. - Published in : EPJ Web Conf. 295 (2024) 02007 Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.02007
4.
A programming framework for data streaming on the Xeon Phi / Chapeland, S (CERN) /ALICE
ALICE (A Large Ion Collider Experiment) is the dedicated heavy-ion detector studying the physics of strongly interacting matter and the quark-gluon plasma at the CERN LHC (Large Hadron Collider). After the second long shut-down of the LHC, the ALICE detector will be upgraded to cope with an interaction rate of 50 kHz in Pb-Pb collisions, producing in the online computing system (O2) a sustained throughput of 3.4 TB/s. [...]
2017 - 8 p. - Published in : J. Phys.: Conf. Ser. 898 (2017) 072007 Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.072007
5.
Towards the integrated ALICE Online-Offline (O$^2$) monitoring subsystem / Chibante Barroso, Vasco (CERN) ; Elia, Domenico (INFN, Bari) ; Grigoras, Costin (CERN) ; Gomez Ramirez, Andres (Goethe U., Frankfurt (main)) ; Vino, Gioacchino (INFN, Bari) ; Wegrzynek, Adam (CERN)
ALICE (A Large Ion Collider Experiment) is preparing for a major upgrade of the detector, readout and computing systemsfor LHC Run 3. A new facility called O$^2$ (Online-Offline) will play a major role in data compression and event processing. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 03043 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.03043
6.

ALICE-PHO-DAQ-2020-001
© 2020-2022 CERN
The ALICE detector's First Level Processor (FLP) system
The ALICE O2 FLP (First Layer Processor) farm cons [...]
11-11-2020
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7.
Data Sampling methods in the ALICE O$^2$ distributed processing system / Konopka, Piotr (AGH-UST, Cracow ; CERN) ; von Haller, Barthélémy (CERN)
The ALICE experiment at the CERN LHC focuses on studying the quark-gluon plasma produced by heavy-ion collisions. Starting from 2021, it will see its input data throughput increase a hundredfold, up to 3.5 TB/s. [...]
2021 - 6 p. - Published in : Comput. Phys. Commun. 258 (2021) 107581 Fulltext from publisher: PDF;
8.
Towards the ALICE Online-Offline (O$^2$) control system / Mrnjavac, Teo (CERN) ; Chibante Barroso, Vasco (CERN)
The ALICE Experiment at CERN LHC (Large Hadron Collider) is under preparation for a major upgrade that is scheduled to be deployed during Long Shutdown 2 in 2019-2020 and that includes new computing systems, called O$^2$ (Online-Offline). To ensure the efficient operation of the upgraded experiment along with its newly designed computing system, a reliable, high performance and automated control system will be developed with the goal of managing the lifetime of all the O$^2$ processes, and of handling the various phases of the data taking activity by interacting with the detectors, the trigger system and the LHC. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 01033 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.01033
9.
The ALICE analysis framework for LHC Run 3 / Berzano, Dario (CERN ; INFN, Italy) ; Deckers, Roel (CERN) ; Grigoras, Costin (CERN) ; Floris, Michele (CERN) ; Hristov, Peter (CERN) ; Krzewicki, Mikolaj (CERN ; Frankfurt U., FIAS ; Goethe U., Frankfurt (main)) ; Zimmermann, Markus (CERN)
The ALICE experiment at the LHC (CERN) is currently developing a new software framework designed for Run 3: detector and software will have to cope with Pb–Pb collision rates 100 times higher than today, leading to the combination of core Online-Offline operations into a single framework called O$^2$. The analysis code is expected to run on a few large Analysis Facilities counting 20k cores and sustainin ga 100 GB/s throughput: this requires a conjoint effort between the definition of the data format, the configuration of the Analysis Facilities and the development of the Analysis Framework. [...]
2019 - 9 p. - Published in : EPJ Web Conf. 214 (2019) 05045 Fulltext from publisher: PDF;
In : 23rd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2018, Sofia, Bulgaria, 9 - 13 Jul 2018, pp.05045
10.
The ALICE O2 data quality control system / Konopka, Piotr (CERN ; AGH-UST, Cracow) ; von Haller, Barthélémy (CERN) /ALICE Collaboration
The ALICE Experiment at CERN LHC (Large Hadron Collider) is undertaking a major upgrade during LHC Long Shutdown 2 in 2019–2021. The raw data input from the ALICE detectors will then increase a hundredfold, up to 3.5 TB/s. [...]
2020 - 7 p. - Published in : EPJ Web Conf. 245 (2020) 01027 Fulltext from publisher: PDF;
In : 24th International Conference on Computing in High Energy and Nuclear Physics, Adelaide, Australia, 4 - 8 Nov 2019, pp.01027

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