CERN Accelerating science

ALICE Conference Contributions

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2019-11-19
06:00
Readout software for the ALICE integrated Online-Offline (O$^2$) system / Chapeland, Sylvain (CERN) ; Costa, Filippo (CERN) /ALICE
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

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2019-11-19
06:00
Data handling in the ALICE O$^2$ event processing / Richter, Matthias (CERN ; Oslo U.) ; Krzewicki, Mikolaj (Frankfurt U., FIAS) ; Eulisse, Giulio (CERN)
The ALICE experiment at the Large Hadron Collider (LHC) at CERN is planned to be operated in a continuous data-taking mode in Run 3. This will allow to inspect data from all Pb-Pb collisions at a rate of 50 kHz, giving access to rare physics signals embedded in a large background. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 01035 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.01035

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2019-11-19
06:00
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

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2019-11-16
09:33
A scalable and asynchronous detector simulation system based on ALFA / Wenzel, Sandro (CERN) /ALICE Collaboration
In the context of the common online-offline computing infrastructure for Run3 (ALICE-O2), ALICE is reorganizing its detector simulation software to be based on FairRoot, offering a common toolkit to implement simulation based on the Virtual-Monte-Carlo (VMC) scheme. Recently, FairRoot has been augmented by ALFA, a software framework developed in collaboration between ALICE and FAIR, offering portable building blocks to construct message-based and loosely-coupled multiprocessing systems. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 02029 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.02029

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2019-11-15
06:29
A simulation tool for ALICE storage and computing resource usage / Abramyan, Armenuhi (Yerevan Phys. Inst.) ; Manukyan, Narine (Yerevan Phys. Inst. ; CERN) ; Hallyburton, Tim (CERN) ; Betev, Latchezar (CERN) ; Buncic, Predrag (CERN) ; Grigoryan, Ara (Yerevan Phys. Inst.)
The LHC experiments produce many tens of petabytes of data each year, which must be stored, processed and analyzed. The CPU and storage resources required for these activities are planned for and requested on yearly basis. [...]
2019 - 7 p. - Published in : EPJ Web Conf. 214 (2019) 03017 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.03017

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2019-11-14
06:14
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

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2019-11-14
06:14
The security model of the ALICE next generation Grid framework / Martinez Pedreira, Miguel (CERN) ; Grigoras, Costin (CERN) ; Yurchenko, Volodymyr (Natl. Acad. of Sci. of Ukraine) ; Melnik Storetvedt, Maksim (HVL, Norway)
JAliEn (Java-AliEn) is the ALICE next generation Grid framework which will be used for the top-level distributed computing resources management during the LHC Run 3 and onward. While preserving an interface familiar to the ALICE users, its performance and scalability are an order of magnitude better than the currently used framework. [...]
2019 - 5 p. - Published in : EPJ Web Conf. 214 (2019) 03042 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.03042

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2019-11-14
06:14
JAliEn: the new ALICE high-performance and high-scalability Grid framework / Martinez Pedreira, M (CERN) ; Grigoras, C (CERN) ; Yurchenko, V (CERN)
The ALICE experiment will undergo extensive hardware and software upgrades for the LHC Run3. This translates in significant increase of the CPU and storage resources required for data processing, and at the same time the data access rates will grow linearly with the amount of resources. [...]
2019 - 8 p. - Published in : EPJ Web Conf. 214 (2019) 03037 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.03037

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2019-11-12
06:10
Performance of the ALICE charged-particle veto detector in Pb-Pb and pp collisions at the LHC / Kondratyuk, Evgeny (Serpukhov, IHEP) /ALICE
The charged-particle veto (CPV) detector of the ALICE experiment is a multi-wire proportional chamber with pad readout. It is designed to improve photon identification in the photon spectrometer PHOS. [...]
2019 - 6 p. - Published in : AIP Conf. Proc. 2163 (2019) 030007
In : The XXIII International Scientific Conference of Young Scientists and Specialists, Dubna, Russia, 15 - 19 Apr 2019, pp.030007

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2019-11-12
06:10
Evolution of the ALICE software framework for Run 3 / Eulisse, Giulio (CERN) ; Konopka, Piotr (AGH-UST, Cracow ; CERN) ; Krzewicki, Mikolaj (Frankfurt U., FIAS ; Goethe U., Frankfurt (main)) ; Richter, Matthias (U. Oslo (main)) ; Rohr, David (CERN) ; Wenzel, Sandro (CERN)
ALICE is one of the four major LHC experiments at CERN. When the accelerator enters the Run 3 data-taking period, starting in 2021, ALICE expects almost 100 times more Pb-Pb central collisions than now, resulting in a large increase of data throughput. [...]
2019 - 7 p. - Published in : EPJ Web Conf. 214 (2019) 05010 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.05010

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