CERN Accelerating science

CERN Published Articles

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2017-12-15
06:21
CMS event processing multi-core efficiency status / Jones, C D (Fermilab) /CMS
In 2015, CMS was the first LHC experiment to begin using a multi-threaded framework for doing event processing. This new framework utilizes Intel’s Thread Building Block library to manage concurrency via a task based processing model. [...]
2017 - 7 p. - Published in : J. Phys. : Conf. Ser. 898 (2017) 042008 Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.042008

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2017-12-15
06:21
Validation of physics models of Geant4 using data from CMS experiment / Banerjee, Sunanda (Fermilab) /CMS
CMS has tuned its simulation program and has chosen a specific physics model of GEANT4 by comparing the simulation results with dedicated test beam experiments. CMS continues to validate the physics models inside GEANT4 using the test beam data as well as collision data. [...]
2017 - 8 p. - Published in : J. Phys. : Conf. Ser. 898 (2017) 042005 Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.042005

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2017-12-15
06:21
ALICE HLT Run 2 performance overview / Krzewicki, Mikolaj (Frankfurt U., FIAS) ; Lindenstruth, Volker (Frankfurt U., FIAS) /ALICE
For the LHC Run 2 the ALICE HLT architecture was consolidated to comply with the upgraded ALICE detector readout technology. The software framework was optimized and extended to cope with the increased data load. [...]
2017 - 7 p. - Published in : J. Phys. : Conf. Ser. 898 (2017) 032056 Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.032056

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2017-12-15
06:21
Support for online calibration in the ALICE HLT framework / Krzewicki, Mikolaj (Frankfurt U. ; FIGGS, Frankfurt) ; Rohr, David (Frankfurt U. ; CERN) ; Zampolli, Chiara (CERN ; INFN, Bologna) ; Wiechula, Jens (Frankfurt U.) ; Gorbunov, Sergey (Frankfurt U.) ; Chauvin, Alex (Munich, Tech. U.) ; Vorobyev, Ivan (Munich, Tech. U.) ; Weber, Steffen (Darmstadt, Tech. U. ; Darmstadt, GSI) ; Schweda, Kai (Heidelberg U.) ; Shahoyan, Ruben (CERN) et al. /ALICE
The ALICE detector employs sub detectors sensitive to environmental conditions such as pressure and temperature, e.g. the time projection chamber (TPC). [...]
2017 - 5 p. - Published in : J. Phys. : Conf. Ser. 898 (2017) 032055 Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.032055

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2017-12-15
06:21
YARR - A PCIe based readout concept for current and future ATLAS Pixel modules / Heim, Timon (LBNL, Berkeley)
The Yet Another Rapid Readout (YARR) system is a DAQ system designed for the readout of current generation ATLAS Pixel FE-I4 and next generation chips. It utilises a commercial-off-the-shelf PCIe FPGA card as a reconfigurable I/O interface, which acts as a simple gateway to pipe all data from the Pixel modules via the high speed PCIe connection into the host system’s memory. [...]
2017 - 8 p. - Published in : J. Phys. : Conf. Ser. 898 (2017) 032053 Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.032053

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2017-12-15
06:21
Real time analysis with the upgraded LHCb trigger in Run III / Szumlak, Tomasz (AGH-UST, Cracow)
The current LHCb trigger system consists of a hardware level, which reduces the LHC bunch-crossing rate of 40 MHz to 1.1 MHz, a rate at which the entire detector is read out. A second level, implemented in a farm of around 20k parallel processing CPUs, the event rate is reduced to around 12.5 kHz. [...]
2017 - 6 p. - Published in : J. Phys. : Conf. Ser. 898 (2017) 032051 Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.032051

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2017-12-15
06:21
Visualization of historical data for the ATLAS detector controls - DDV / Maciejewski, J (CERN) ; Schlenker, S (CERN)
The ATLAS experiment is one of four detectors located on the Large Hardon Collider (LHC) based at CERN. Its detector control system (DCS) stores the slow control data acquired within the back-end of distributed WinCC OA applications, which enables the data to be retrieved for future analysis, debugging and detector development in an Oracle relational database. [...]
2017 - 6 p. - Published in : J. Phys. : Conf. Ser. 898 (2017) 032045 Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.032045

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2017-12-15
06:21
Acceleration of Cherenkov angle reconstruction with the new Intel Xeon/FPGA compute platform for the particle identification in the LHCb Upgrade / Faerber, Christian (CERN)
The LHCb experiment at the LHC will upgrade its detector by 2018/2019 to a ‘triggerless’ readout scheme, where all the readout electronics and several sub-detector parts will be replaced. The new readout electronics will be able to readout the detector at 40 MHz. [...]
2017 - 8 p. - Published in : J. Phys. : Conf. Ser. 898 (2017) 032044 Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.032044

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2017-12-15
06:21
The InfiniBand based Event Builder implementation for the LHCb upgrade / Falabella, A (INFN, CNAF) ; Giacomini, F (INFN, CNAF) ; Manzali, M (INFN, CNAF ; Ferrara U.) ; Marconi, U (INFN, Bologna) ; Neufeld, N (CERN) ; Valat, S (CERN) ; Voneki, B (CERN)
The LHCb experiment will undergo a major upgrade during the second long shutdown (2019 - 2020). The upgrade will concern both the detector and the Data Acquisition system, which are to be rebuilt in order to optimally exploit the foreseen higher event rate. [...]
2017 - 7 p. - Published in : J. Phys. : Conf. Ser. 898 (2017) 032036 Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.032036

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2017-12-15
06:21
A web-based application for the collection, management and release of alignment and calibration configurations used in data processing at the Compact Muon Solenoid experiment / Mecionis, Audrius (Vilnius U.) ; Di Guida, Salvatore (Guglielmo Marconi U.) ; Franzoni, Giovanni (CERN) ; Musich, Marco (Louvain U.) ; Cerminara, Gianluca (CERN) ; Pfeiffer, Andreas (CERN) ; Govi, Giacomo (Fermilab) /CMS
The Compact Muon Solenoid (CMS) experiment makes a vast use of alignment and calibration measurements in several data processing workflows: in the High Level Trigger, in the processing of the recorded collisions and in the production of simulated events for data analysis and studies of detector upgrades. A complete alignment and calibration scenario is factored in approximately three-hundred records, which are updated independently and can have a time-dependent content, to reflect the evolution of the detector and data taking conditions. [...]
2017 - 5 p. - Published in : J. Phys. : Conf. Ser. 898 (2017) 032034 Fulltext: PDF;
In : 22nd International Conference on Computing in High Energy and Nuclear Physics, CHEP 2016, San Francisco, Usa, 10 - 14 Oct 2016, pp.032034

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