1.
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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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2.
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Qualification of the Bypass Continuity of the Main Dipole Magnet Circuits of the LHC
/ Rowan, Scott (CERN) ; Auchmann, Bernhard (CERN) ; Brodzinski, Krzysztof (CERN) ; Charifoulline, Zinour (CERN) ; Panev, Bozhidar Ivanov (CERN) ; Pfeffer, Howard (Fermilab) ; Rodriguez-Mateos, Felix (CERN) ; Romera, Iván (CERN) ; Schmidt, Ruediger (CERN) ; Siemko, Andrzej (CERN) et al.
The copper-stabilizer continuity measurement (CSCM) was devised in order to attain complete electrical qualification of all busbar joints, lyres, and the magnet bypass connections in the 13~kA circuits of the LHC. A CSCM is carried out at 20 K, i.e., just above the critical temperature, with resistive magnets. [...]
CERN-ACC-2015-232.-
2015 - 4 p.
- Published in : 10.18429/JACoW-IPAC2015-WEPHA017
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.WEPHA017
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3.
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Quench detection and diagnostic systems for the superconducting circuits for the HL-LHC
/ Denz, Reiner (CERN) ; Blasco Serrano, Daniel (Madrid, CIEMAT ; CERN) ; Calcoen, Daniel (CERN) ; De Matteis, Ernesto (CERN) ; Froidbise, Vincent (CERN) ; Georgakakis, Spyridon (CERN) ; Haas, Severin (CERN) ; Mundra, Surbhi (CERN) ; Podzorny, Tomasz (CERN) ; Siemko, Andrzej (CERN) et al.
The High Luminosity Upgrade of the LHC [1] will incorporate a new generation of superconducting elements such as high field superconducting magnets based on Nb$_3$Sn conductors and MgB$_2$ high temperature superconducting links for magnet powering. The proper protection and diagnostics of those elements require the development of a new generation of integrated quench detection and data acquisition systems as well as novel methods for quench detection. [...]
CERN-ACC-2019-259.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-THPTS036
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPTS036
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4.
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An Enhanced Quench Detection System for Main Quadrupole Magnets in the Large Hadron Collider
/ Spasic, Jelena (CERN) ; Calcoen, Daniel (CERN) ; Denz, Reiner (CERN) ; Froidbise, Vincent (CERN) ; Georgakakis, Spyridon (CERN) ; Podzorny, Tomasz (CERN) ; Siemko, Andrzej (CERN) ; Steckert, Jens (CERN)
To further improve the performance and reliability of the quench detection system (QDS) for main quadrupole magnets in the Large Hadron Collider (LHC), there is a planned upgrade of the system during the long shutdown period of the LHC in 2019-2020. While improving the already existing functionalities of quench detection for quadrupole magnets and field-bus data acquisition, the enhanced QDS will incorporate new functionalities to strengthen and improve the system operation and maintenance. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-WEPAF081
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPAF081
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5.
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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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6.
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First Operational Experience of DSL Based Analysis Modules for LHC Hardware Commissioning
/ Zerlauth, Markus (CERN) ; Aguilera-Padilla, Cesar (CERN) ; Audrain, Maxime (CERN) ; Charifoulline, Zinour (CERN) ; Dragu, Matei (CERN) ; Garnier, Jean-Christophe (CERN) ; Heil, Raphaela (CERN) ; Koza, Mateusz (CERN) ; Krol, Kamil (CERN) ; Martins Ribeiro, Tiago (CERN) et al.
The Large Hadron Collider powering systems have been tested and commissioned before to start the second run of physics production. This commissioning used for the first time analysis modules defined directly by system experts in an english-like domain specific language. [...]
CERN-ACC-2015-304.-
2015 - 3 p.
- Published in : (2015) , pp. MOPTY059
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.MOPTY059
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7.
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Enhanced Diagnostic Systems for the Supervision of the Superconducting Circuits of the LHC
/ Denz, Reiner (CERN) ; Charifoulline, Zinour (CERN) ; Dahlerup-Petersen, Knud (CERN) ; Siemko, Andrzej (CERN) ; Steckert, Jens (CERN)
Being an integral part of the protection system for the superconducting circuits of the LHC, the data acquisition systems used for the circuit supervision underwent a substantial upgrade during the first long shutdown of the LHC. The sampling rates and resolution of most of the acquired signals increased significantly. [...]
CERN-ACC-2015-247.-
2015 - 3 p.
- Published in : (2015) , pp. WEPMN071
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.WEPMN071
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8.
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A Statistical Analysis of Electrical Faults in the LHC Superconducting Magnets and Circuits
/ Bottura, Luca (CERN) ; Tock, Jean-Philippe (CERN) ; Auchmann, Bernard (CERN) ; Bednarek, Mateusz (CERN) ; Calcoen, Daniel (CERN) ; Charifoulline, Zinour (CERN) ; Coelingh, Gert-Jan (CERN) ; D'Angelo, Giorgio (CERN) ; Hagen, Per (CERN) ; Le Naour, Sandrine (CERN) et al.
The large hadron collider (LHC) at CERN has been operating and generating physics experimental data since September 2008, and following its first long shut down, it has entered a second, 4-year-long physics run. It is to date the largest superconducting installation ever built, counting over 9000 magnets along its 27-km long circumference. [...]
2017 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2017) 4000505
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4000505
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9.
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Analysis of the Dependability of the LHC Quench Detection System During LHC Run 2 and Further System Evolution
/ Podzorny, Tomasz (CERN) ; Calcoen, Daniel (CERN) ; Denz, Reiner (CERN) ; Siemko, Andrzej (CERN) ; Spasic, Jelena (CERN) ; Steckert, Jens (CERN)
The quench detection system (QDS) of the LHC superconducting circuits is an essential part of the LHC machine protection and ensures the integrity of key elements of the accelerator. The large amount of hardwired and software interlock channels of the QDS requires a very high system dependability in order to reduce the risk of affecting the successful operation of the LHC. [...]
CERN-ACC-2017-129.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPAB007
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPAB007
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10.
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FGC3.2: A New Generation of Embedded Controls Computer for Power Converters at CERN
/ Page, Stephen (CERN) ; Ghabrous Larrea, Carlos (CERN) ; King, Quentin (CERN) ; Todd, Benjamin (CERN) ; Uznanski, Slawosz (CERN) ; Zielinski, Dariusz (CERN)
Modern power converters (power supplies) at CERN are controlled by devices known as Function Generator/Controllers (FGCs), which are embedded computer systems providing function generation, current and field regulation, and state control. FGCs were originally conceived for the LHC in the early 2000s, though later generations are now increasingly being deployed in the accelerators in the LHC Injector Chain (Linac4, Booster, Proton Synchrotron and SPS) to replace obsolete equipment. [...]
2020 - 5 p.
- Published in : 10.18429/JACoW-ICALEPCS2019-MOPHA106
Fulltext: PDF;
In : 17th Biennial International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS), New York, United States, 5 - 11 Oct 2019, pp.MOPHA106
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