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A Modernized Architecture for the Post Mortem System at CERN
/ Barth, Jonas (CERN) ; Bogyai, Filip (CERN) ; Garnier, Jean-Christophe (CERN) ; Majewski, Marcin (CERN) ; Martins Ribeiro, Tiago (CERN) ; Mnich, Aleksandra (CERN) ; Pocwierz, Maciej (CERN) ; Selvek, Robert (CERN) ; Simpson, Robert (CERN) ; Stanisz, Anita (CERN) et al.
The control system of the accelerators at CERN stores and analyzes more than 200 million dumps of high resolution data recordings every year in the Post Mortem (PM) system. A continuous increase in the complexity of the Large Hadron Collider’s (LHC) systems and the desire to collect more accurate data requires continuous improvement of the PM system. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1557-1560
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1557-1560
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2.
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Renovation and extension of supervision software leveraging reactive streams
/ Galilée, Marc-Antoine (CERN) ; Calia, Andrea (CERN) ; Do, Janet (CERN) ; Fuchsberger, Kajetan (CERN) ; Garnier, Jean-Christophe (CERN) ; Krol, Kamil (CERN) ; Osinski, Maciej (CERN) ; Pocwierz, Maciej (CERN) ; Ribeiro, Tiago (CERN) ; Stanisz, Anita (CERN) et al.
Inspired by the recent developments of reactive programming and the ubiquity of the concept of streams in modern software industry, we assess the relevance of a reactive streams solution in the context of accelerator controls. The promise of reactive streams, to govern the exchange of data across asynchronous boundaries at a rate sustainable for both the sender and the receiver, is alluring to most data-centric processes of CERN's accelerators. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-ICALEPCS2017-THPHA152
Fulltext: PDF;
In : International Conference on Accelerator and Large Experimental Physics Control Systems, Barcelona, Spain, 8 - 13 Oct 2017, pp.THPHA152
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3.
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Real-time Java to support the device property model
/ Cardin, Chloe (CERN) ; Galilée, Marc-Antoine (CERN) ; Garnier, Jean-Christophe (CERN) ; Krol, Kamil (CERN) ; Osinski, Maciej (CERN) ; Stanisz, Anita (CERN) ; Zerlauth, Markus (CERN)
Today's front-end controllers, which are widely used in CERNs controls environment, feature CPUs with high clock frequencies and extensive memory storage. Their specifications are comparable to low-end servers, or even smartphones. [...]
2018 - 5 p.
- Published in : 10.18429/JACoW-ICALEPCS2017-THPHA153
Fulltext: PDF;
In : International Conference on Accelerator and Large Experimental Physics Control Systems, Barcelona, Spain, 8 - 13 Oct 2017, pp.THPHA153
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4.
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Second Generation LHC Analysis Framework: Workload-based and User-oriented Solution
/ Boychenko, Serhiy (CERN) ; Aguilera-Padilla, Cesar (CERN) ; Galilée, Marc-Antoine (CERN) ; Garnier, Jean-Christophe (CERN) ; Gorzawski, Arkadiusz (CERN) ; Krol, Kamil (CERN) ; Makai, Jozsef (CERN) ; Osinski, Maciej (CERN) ; Poeschl, Matthias (CERN) ; Rela, Mario (Coimbra U.) et al.
Consolidation and upgrades of accelerator equipment during the first long LHC shutdown period enabled particle collisions at energy levels almost twice higher compared to the first operational phase. Consequently, the software infrastructure providing vital information for machine operation and its optimisation needs to be updated to keep up with the challenges imposed by the increasing amount of collected data and the complexity of analysis. [...]
CERN-ACC-2016-195.-
2016 - 4 p.
- Published in : 10.18429/JACoW-IPAC2016-WEPOR051
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.WEPOR051
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5.
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Smooth Migration of CERN Post Mortem Service to a Horizontally Scalable Service
/ Garnier, Jean-Christophe (CERN) ; Aguilera-Padilla, Cesar (CERN) ; Boychenko, Serhiy (CERN) ; Dragu, Matei (CERN) ; Galilée, Marc-Antoine (CERN) ; Koza, Mateusz (CERN) ; Krol, Kamil (CERN) ; Martins Ribeiro, Tiago (CERN) ; Orlandi, Roberto (CERN) ; Poeschl, Matthias (CERN) et al.
The Post Mortem service for CERNs accelerator complex stores and analyses transient data recordings of various equipment systems following certain events, like a beam dump or magnet quenches. The main purpose of this framework is to provide fast and reliable diagnostic to the equipment experts and operation crews to decide whether accelerator operation can continue safely or whether an intervention is required. [...]
2015 - 4 p.
- Published in : 10.18429/JACoW-ICALEPCS2015-WEPGF047
Fulltext: PDF; External link: JACoW
In : 15th International Conference on Accelerator and Large Experimental Physics Control Systems, Melbourne, Australia, 17 - 23 Oct 2015, pp.WEPGF047
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6.
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Summary of the Post-Long Shutdown 2 LHC Hardware Commissioning Campaign
/ Apollonio, Andrea (CERN) ; Andreassen, Odd (CERN) ; Antoine, Alain (CERN) ; Argyropoulos, Theodoros (CERN) ; Bastos, Miguel (CERN) ; Bednarek, Mateusz (CERN) ; Bordini, Bernardo (CERN) ; Brodzinski, Krzysztof (CERN) ; Calia, Andrea (CERN) ; Charifoulline, Zinour (CERN) et al.
In this contribution we provide a summary of the LHC hardware commissioning campaign following the second CERN Long Shutdown (LS2), initially targeting the nominal LHC energy of 7 TeV. A summary of the test procedures and tools used for testing the LHC superconducting circuits is given, together with statistics on the successful test execution. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 335-338
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.335-338
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7.
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Observations, Analysis and Mitigation of Recurrent LHC Beam Dumps Caused by Fast Losses in Arc Half-Cell 16L2
/ Jimenez, José (CERN) ; Amorim, David (CERN ; U. Grenoble Alpes) ; Antipov, Sergey (CERN) ; Arduini, Gianluigi (CERN) ; Bertarelli, Alessandro (CERN) ; Biancacci, Nicolo (CERN) ; Bradu, Benjamin (CERN) ; Bravin, Enrico (CERN) ; Bregliozzi, Giuseppe (CERN) ; Brodzinski, Krzysztof (CERN) et al.
Recurrent beam dumps significantly perturbed the operation of the CERN LHC in the summer months of 2017, especially in August. These unexpected beam dumps were triggered by fast beam losses that built up in the cryogenic beam vacuum at the half-cell 16 left of LHC-IP2 and were detected either at that location but mainly in the collimation insertions. [...]
CERN-ACC-2018-164.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-MOPMF053
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF053
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8.
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Streaming Pool - managing long-living reactive streams for Java
/ Calia, Andrea (CERN) ; Fuchsberger, Kajetan (CERN) ; Gabriel, Mathieu (CERN) ; Galilée, Marc-Antoine (CERN) ; Garnier, Jean-Christophe (CERN) ; Hemelsoet, Georges-Henry (CERN) ; Hostettler, Michael (CERN) ; Hruska, Marek (CERN) ; Jacquet, Delphine (CERN) ; Makai, Jozsef (CERN) et al.
A common use case in accelerator control systems is subscribing to many properties and multiple devices and combine data from this. A new technology which got standardized during recent years in software industry are so-called reactive streams. [...]
2018 - 5 p.
- Published in : 10.18429/JACoW-ICALEPCS2017-THPHA176
Fulltext: PDF;
In : International Conference on Accelerator and Large Experimental Physics Control Systems, Barcelona, Spain, 8 - 13 Oct 2017, pp.THPHA176
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9.
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Multi-criteria partitioning on distributed file systems for efficient accelerator data analysis and performance optimization
/ Boychenko, Serhiy (CERN) ; Galilee, Marc-Antoine (CERN) ; Garnier, Jean-Christophe (CERN) ; Zenha-Rela, Mario (Coimbra U.) ; Zerlauth, Markus (CERN)
Since the introduction of the MapReduce paradigm, relational databases are being increasingly replaced by more efficient and scalable architectures, in particular in environments where a query will process Terabtes or even Petabytes of data in a single execution. The same tendency is observed at CERN, where data archiving systems for operational accelerator data are already working well beyond their initially provisioned capacity. [...]
2018 - 6 p.
- Published in : 10.18429/JACoW-ICALEPCS2017-THPHA036
Fulltext: PDF;
In : International Conference on Accelerator and Large Experimental Physics Control Systems, Barcelona, Spain, 8 - 13 Oct 2017, pp.THPHA036
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10.
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Safe Disposal of the LHC Beam without Beam Dump - Method and Experimental Verification
/ Valette, Matthieu (CERN) ; Lindstrom, Bjorn (CERN) ; Mereghetti, Alessio (CERN) ; Schmidt, Ruediger (CERN) ; Solfaroli, Matteo (CERN) ; Uythoven, Jan (CERN) ; Valuch, Daniel (CERN) ; Wenninger, Jorg (CERN) ; Wollmann, Daniel (CERN) ; Zerlauth, Markus (CERN)
In the extremely unlikely event of a non-working beam dumping system in the LHC, the 360 MJ of stored beam energy can be dissipated in the collimation system as a last mitigation measure. In such a situation, it is important to reduce the stored beam energy both quickly and at the same time as smoothly as possible in order to limit the risk of trips of critical systems, to avoid quenches of superconducting magnets (which would lead to changes of the beam trajectory and damage to the accelerator) and ultimately damage to the collimators themselves. [...]
2018 - 4 p.
- Published in : (2018) , pp. MOPMF060
- Published in : J. Phys.: Conf. Ser. 1067 (2018) 022007
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF060
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