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1.
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Hardware Commissioning of the HL-LHC Inner Triplet String Facility at CERN: Individual System and Short Circuit Tests
/ Yammine, Samer (CERN) ; Antoine, Alain (CERN) ; Onufrena, Aleksandra (CERN) ; Perin, Antonio (CERN) ; Panev, Bozhidar Ivanov (CERN) ; Bozzini, Davide (CERN) ; Coulot, Emilien (CERN) ; Thiesen, Hugues (CERN) ; Zerlauth, Markus (CERN) ; Bajko, Marta (CERN) et al.
The goal of the High Luminosity-Large Hadron Collider (HL-LHC) Inner Triplet (IT) String test, is to validate the assembly and connection procedures and tools required for its construction, to assess the collective behavior of the superconducting magnet chain in conditions as close as possible to those of their operation in the HL-LHC and to provide a training opportunity for the equipment teams for their work in the LHC tunnel. The IT String includes the systems required for operation at nominal conditions, such as the cryogenics, powering and quench protection systems. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) THPS50
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.THPS50
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2.
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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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3.
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Systems performance: Circuits
/ Antoine, A (CERN) ; Bednarek, M (CERN) ; Charifoulline, Z (CERN) ; Coelingh, G J (CERN) ; D'angelo, G (CERN) ; Denz, R (CERN) ; Montabonnet, V (CERN) ; Nielsen, J (CERN) ; Nisbet, D (CERN) ; Panev, B (CERN) et al.
The performance of the LHC magnet circuits for the proton physics run in 2017 is
evaluated. This contribution focuses on the availability of magnet powering (PC)
and protection systems (QPS, EE, FMCM and Interlocks) and evaluates the impact
of the new deployments, mainly the FGClite and RPADO power converters, on the
overall performance of the machine [...]
2019 - 3 p.
- Published in : (2019) , pp. 55-57
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.55-57
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4.
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Interlock System Upgrades at the CERN Accelerator Complex During Long Shutdown 2
/ Uythoven, Jan (CERN) ; Antoine, Alain (CERN) ; Martin, Christophe (CERN) ; Mirana Fontan, Adrian (CERN) ; Mompo, Richard (CERN) ; Romera Ramírez, Iván (CERN) ; Secondo, Raffaello (CERN)
The CERN accelerator complex stopped operation at the end of 2018 for the Long Shutdown 2 (LS2), allowing for the LHC Injector Upgrade program (LIU) and consolidation work to be accomplished. A gradual restart of the different accelerators is ongoing in 2021, culminating with the LHC foreseen to be back in operation early 2022. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC '21 (2021) 3316-3319
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3316-3319
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5.
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Systems overview: Power Converter and their Controls
/ Uznanski, S (CERN) ; Antoine, A (CERN) ; Garcia Alia, R (CERN) ; Montabonnet, V (CERN) ; Romera, I (CERN) ; Thurel, Y (CERN) ; Todd, B (CERN)
In this paper, performance of power converters for the Run 2 of the Large Hadron
Collider (LHC) is evaluated. This contribution focuses on the availability of
different families of power converters, their evolution, analyses known failure
modes and discusses mitigation of failures in the future. [...]
Geneva, Switzerland : , 2019 - 3 p.
- Published in : , pp. 139-141
Fulltext: PDF;
In : 9th LHC Operations Evian Workshop, Evian Les Bains, France, 30 Jan - 1 Feb 2019, pp.139-141
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6.
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Operational performance of the machine protection systems of the Large Hadron Collider during Run 2 and lessons learnt for the LIU/HL-LHC era
/ Zerlauth, Markus (CERN) ; Antoine, Alain (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Charifoulline, Zinour (CERN) ; Denz, Reiner (CERN) ; Goddard, Brennan (CERN) ; Lechner, Anton (CERN) ; Magnin, Nicolas (CERN) et al.
The Large Hadron Collider (LHC) has successfully completed its second operational run in December 2018. To allow for the completion of the diverse physics program at 6.5 TeV, the machine has been routinely operating with stored beam energies up to 300 MJ per beam during high intensity proton runs as well as being frequently reconfigured to allow for special physics runs and important machine development studies. [...]
CERN-ACC-2019-240.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-THPRB031
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPRB031
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7.
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Integration of PLC and PXI control systems
/ Antoine, Alain (CERN) ; Boucly, Christophe (CERN) ; Gharsa, Thierry (CERN)
Engineers are often challenged with the need to integrate several technologies to find optimal solutions when designing new control architectures. Generally, the technical solutions chosen require the combination of various industrial products such as PXI systems for applications requiring fast acquisition, analysis and reaction times, while PLCs are commonly used for their reliability and their ability to withstand industrial environments. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-ICALEPCS2017-THPHA145
Fulltext: PDF;
In : International Conference on Accelerator and Large Experimental Physics Control Systems, Barcelona, Spain, 8 - 13 Oct 2017, pp.THPHA145
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8.
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Recurring sources of premature beam dumps
/ Antoine, A (CERN) ; Apollonio, A (CERN) ; Josifovic, A (CERN) ; Lechner, D (CERN) ; Nisbet, D (CERN) ; Montabonnet, V (CERN) ; Ponce, L (CERN) ; Romera Ramirez, B (CERN) ; Todd, B (CERN) ; Uythoven, J (CERN) et al.
While the fraction of premature beam dumps has considerable decreased during the 2016 Run in favour of programmed end of fill dumps, still 1 out of 2 beam aborts are non-programmed. The root causes of these are primarily equipment failures as well as UFOs and electrical perturbations. [...]
Geneva : CERN, 2017 - 4 p.
- Published in : (2017) , pp. 73-76
Fulltext: PDF;
In : 7th Evian Workshop on LHC beam operation, Evian Les Bains, France, 13 - 15 Dec 2016, pp.73-76
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9.
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Upgrade of the Trigger Synchronisation and Distribution System of the Beam Dumping System of the Large Hadron Collider
/ Magnin, Nicolas (CERN) ; Antoine, Alain (CERN) ; Carlier, Etienne (CERN) ; Chareyre, Vincent (CERN) ; Gabourin, Stéphane (CERN) ; Patsouli, Anastasia (CERN) ; Voumard, Nicolas (CERN)
Various upgrades were performed on the Large Hadron Collider (LHC) Beam Dumping System (LBDS) during Long Shutdown 1 (LS1) at CERN, in particular to the Trigger Synchronisation and Distribution System (TSDS): A redundant direct connection from the LHC Beam Interlock System to the re-trigger lines of the LBDS was implemented, a fully redundant powering architecture was set up, and new Trigger Synchronisation Unit cards were deployed over two separate crates instead of one. These hardware changes implied the adaptation of the State Control and Surveillance System and an improvement of the monitoring and diagnosis systems, like the various Internal Post Operation Check (IPOC) systems that ensure that, after every beam dump event, the LBDS worked as expected and is 'as good as new' for the next LHC beam. [...]
2015 - 4 p.
- Published in : 10.18429/JACoW-ICALEPCS2015-MOPGF135
Fulltext: PDF; External link: JACoW
In : 15th International Conference on Accelerator and Large Experimental Physics Control Systems, Melbourne, Australia, 17 - 23 Oct 2015, pp.MOPGF135
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10.
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First Operational Experience with the LHC Beam Dump Trigger Synchronisation Unit
/ Antoine, A (CERN) ; Boucly, C (CERN) ; Magnin, N (CERN) ; Juteau, P (CERN) ; Voumard, N (CERN)
Two LHC Beam Dumping Systems (LBDS) remove the counter-rotating beams safely from the collider during setting up of the accelerator, at the end of a physics run and in case of emergencies. Dump requests can come from 3 different sources: the machine protection system in emergency cases, the machine timing system for scheduled dumps or the LBDS itself in case of internal failures. [...]
2011 - 4 p.
- Published in : Conf. Proc.: C111010 (2011) , pp. WEPMU019
External link: Published version from JaCoW
In : 13th International Conference on Accelerator and Large Experimental Physics Control Systems, Grenoble, France, 10 - 14 Oct 2011, pp.1100-1103
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