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Maintenance Cost Working Group Results
/ Bailom, Florian (CERN) ; Bossy, Jordi (CERN) ; Chareyre, Vincent (CERN) ; Deleval, Serge (CERN) ; Jensen, Lars (CERN) ; Lafarge, Damien (CERN) ; Langlois, Raphael (CERN) ; Naisson, Pierre ; Nunes, Rui (CERN)
For the proper functioning of Accelerators, Experimental areas, Workshops and other CERN facilities, maintenance of infrastructure is one of the main activities in the EN department [...]
CERN-ACC-NOTE-2022-0042.
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2022. - 4 p.
Full text
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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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Detection and location of electrical insulation faults on the LHC superconducting circuits during hardware commissioning
/ Bozzini, D (CERN) ; Chareyre, V (CERN) ; Mess, K H (CERN) ; Russenschuck, Stephan (CERN)
As part of the electrical quality assurance program (ELQA), the insulation of all superconducting circuits of the LHC has to be tested with a d.c. voltage of up to 1.9 kV. [...]
CERN-TS-2008-004; LHC-PROJECT-Report-1144; CERN-LHC-PROJECT-Report-1144.-
Geneva : CERN, 2008 - 4 p.
Fulltext: CERN-TS-2008-004 - PDF; LHC-PROJECT-REPORT-1144 - PDF; External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.WEPD007
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Automatic System for the D.C. High Voltage Qualification of the Superconducting Electrical Circuits of the LHC Machine
/ Bozzini, D (CERN) ; Chareyre, V (CERN) ; Russenschuck, Stephan (CERN) ; Bednarek, M (Cracow, INP) ; Jurkiewicz, P (Cracow, INP) ; Kotarba, A (Cracow, INP) ; Ludwin, J (Cracow, INP) ; Olek, S (Cracow, INP)
A d.c. high voltage test system has been developed to verify automatically the insulation resistance of the powering circuits of the LHC. [...]
CERN-TS-2008-005; LHC-PROJECT-Report-1145; CERN-LHC-PROJECT-Report-1145.-
Geneva : CERN, 2008 - 4 p.
Preprint: PDF; External links: Fulltext; Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.WEPD008
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Electrical Quality Assurance of the Superconducting Circuits during LHC Machine Assembly
/ Bozzini, D (CERN) ; Chareyre, V (CERN) ; Desebe, O (CERN) ; Mess, K H (CERN) ; Russenschuck, Stephan (CERN) ; Bednarek, M (Cracow, INP) ; Dworak, D (Cracow, INP) ; Górnicki, E (Cracow, INP) ; Jurkiewicz, P (Cracow, INP) ; Kapusta, P (Cracow, INP) et al.
Based on the LHC powering reference database, all-together 1750 superconducting circuits were connected in the various cryogenic transfer lines of the LHC machine. Testing the continuity, magnet polarity, and the quality of the electrical insulation were the main tasks of the Electrical Quality Assurance (ELQA) activities during the LHC machine assembly. [...]
LHC-PROJECT-Report-1141; CERN-LHC-PROJECT-Report-1141.-
Geneva : CERN, 2008 - 4 p.
Preprint: PDF; External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.WEPD016
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The Commissioning of the LHC Technical Systems
/ Saban, R (CERN) ; Alemany-Fernande, R ; Baggiolini, V ; Ballarino, A ; Barbero-Soto, E ; Bellesia, B ; Bordry, Frederick ; Bozzini, D ; Casas-Lino, M-P ; Chareyre, V et al.
The LHC is an accelerator with unprecedented complexity where the energy stored in magnets and the beams exceeds other accelerators by one-to-two orders of magnitude. To ensure a safe and efficient machine start-up without being plagued by technical problems, a phase of "hardware commissioning" was introduced: a thorough commissioning of technical systems without beam. [...]
2007
In : 22nd Particle Accelerator Conference, Albuquerque, NM, USA, 25 - 29 Jun 2007, pp.3801
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Fault Detection and Identification Methods Used for the LHC Cryomagnets and Related Cabling
/ Bozzini, D ; Caspers, Friedhelm ; Chareyre, V ; Duse, Y ; Kroyer, T ; López, R ; Poncet, A ; Russenschuck, Stephan
Several methods for electrical fault location have been developed and tested. As part of the electrical quality assurance program for the LHC, certain wires have to be subjected to a (high) DC voltage for the testing of the insulation. [...]
LHC-PROJECT-Report-963; CERN-LHC-Project-Report-963.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2607
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Experience with the Quality Assurance of the Superconducting Electrical Circuits of the LHC Machine
/ Bozzini, D ; Chareyre, V ; Kotarba, A ; Mess, Karl Hubert ; Olek, S ; Russenschuck, Stephan
The coherence between the powering reference database for the LHC and the Electrical Quality Assurance (ELQA) is guaranteed on the procedural level. However, a challenge remains the coherence between the database, the magnet test and assembly procedures, and the connection of all superconducting circuits in the LHC machine. [...]
LHC-PROJECT-Report-962; CERN-LHC-Project-Report-962.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2604
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