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LHC Triplet Task Force Report
/ Arduini, Gianluigi (CERN) ; Bradu, Benjamin (CERN) ; Brodzinski, Krzysztof (CERN) ; Bruce, Roderik (CERN) ; Cerutti, Francesco (CERN) ; Ciccotelli, Alessia (University of Manchester (GB)) ; Deferne, Guy (CERN) ; Fartoukh, Stephane (CERN) ; Fessia, Paolo (CERN) ; Garion, Cedric (CERN) et al.
The excellent performance of the Large Hadron Collider (LHC) and the extension of Run 3 by one year have led to a significant increase of the expected integrated luminosity by the end of its operation and before the start of the High Luminosity LHC (HL-LHC), exceeding the design LHC integrated luminosity of 300 fb−1 for which the final focus region has been designed. [...]
CERN-ACC-2023-0004.
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2023. - 95 p.
Full text
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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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Mechanical Consolidation of the LHC Inner Triplet Magnet Supporting System for Remote Alignment
/ Micolon, Frederic (CERN) ; Bourcey, Nicolas (CERN) ; Deschamps, Jean-Baptiste (CERN) ; Herty, Andreas (CERN) ; Le Naour, Sandrine (CERN) ; Mikkola, Tommi (CERN) ; Parma, Vittorio (CERN) ; Ramos, Delio (CERN) ; Rude, Vivien (CERN) ; Sosin, Mateusz (CERN)
Given the high radiation area and the tight alignment tolerances, the LHC inner triplet magnets were designed to be realigned remotely using motorized supporting jacks. However, during run 2 the LHC triplet realignment system started to show an unexpected behavior with erratic load variations on the magnet supporting jacks when operated [...]
Geneva : JACoW, 2021 - 3 p.
- Published in : JACoW IPAC 2021 (2021) 2207-2209
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.2207-2209
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4.
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The Inner Triplet String Facility for HL-LHC: Design and Planning
/ Bajko, Marta (CERN) ; Bertolasi, Stefano (CERN) ; Bertone, Caterina (CERN) ; Blanchard, Sebastien (CERN) ; Bozzini, Davide (CERN) ; Brüning, Oliver (CERN) ; Cruikshank, Paul (CERN) ; De Luca, Davide (CERN) ; Dos Santos, Nuno (CERN) ; Dragoni, Francesco (CERN) et al.
In the framework of the HL-LHC project, full-scale integration and operational tests of the superconducting magnet chain, from the inner triplet quadrupoles up to the first separation/recombination dipole, are planned in conditions as similar as possible to the final set-up in the LHC tunnel. The IT String includes all of the required systems for operation at nominal conditions, such as vacuum, cryogenics, warm and cold powering equipment, and protection systems. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 3592-3595
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3592-3595
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5.
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The Second LHC Long Shutdown (LS2) for the Superconducting Magnets
/ Tock, Jean-Philippe (CERN) ; Bednarek, Mateusz (CERN) ; Bottura, Luca (CERN) ; Karentzos, Efstathios (CERN ; Natl. Tech. U., Athens) ; Le Naour, Sandrine (CERN) ; Meuter, Florian (CERN) ; Pojer, Mirko (CERN) ; Scheuerlein, Christian (CERN) ; Todesco, Ezio (CERN) ; Tommasini, Davide (CERN) et al.
The Large Hadron Collider (LHC) has been delivering data to the physics experiments since 2009. It first operated at a centre of mass energy of 7 TeV and 8 TeV up to the first long shutdown (LS1) in 2013-14. [...]
CERN-ACC-2018-114.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-MOPMF056
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF056
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6.
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Resistance of Splices in the LHC Main Superconducting Magnet Circuits at 1.9 K
/ Charifoulline, Zinour (CERN) ; Bednarek, Mateusz Jakub (CERN) ; Denz, Reiner (CERN) ; Le Naour, Sandrine (CERN) ; Scheuerlein, Christian (CERN) ; Siemko, Andrzej (CERN) ; Steckert, Jens (CERN) ; Tock, Jean-Philippe (CERN) ; Verweij, Arjan (CERN) ; Zerlauth, Markus (CERN)
The electrical interconnections between the LHC main magnets are made of soldered joints (splices) of two superconducting Rutherford cables, stabilized by a copper busbar. In 2009, a number of splices was found not properly stabilized and could have suffered a thermal runaway in case of quench at high current. [...]
2018 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4003405
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4003405
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7.
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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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8.
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LHC Full Energy Exploitation Study: Operation at 7 TeV
/ Bruning, Oliver (CERN) ; Garcia Alia, Ruben (CERN) ; Antoniou, Fanouria ; Apollonio, Andrea (CERN) ; Arduini, Gianluigi (CERN) ; Baglin, Vincent (CERN) ; Bartmann, Wolfgang (CERN) ; Bednarek, Mateusz Jakub (CERN) ; Bracco, Chiara (CERN) ; Bregliozzi, Giuseppe (CERN) et al.
This is the first report of a three volume study on the full energy exploitation of the LHC. [...]
CERN-ACC-2017-0086.
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2017. - 51 p.
Full text
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9.
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Pinning Properties of Commercial Nb-Ti Wires Described by a 2-Components Model
/ Muzzi, L (ENEA, Frascati) ; Richter, David (CERN) ; Zignani, Chiarasole Fiamozzi (ENEA, Frascati) ; De Marzi, Gianluca (ENEA, Frascati) ; Muzzi, Luigi (ENEA, Frascati) ; Dominguez, Cesar Octavio (ENEA, Frascati) ; Bottura, Luca (CERN) ; Napolitano, Mathieu (ENEA, Frascati) ; Viola, Rosario (ENEA, Frascati) ; Affinito, Luigi (ENEA, Frascati) et al.
We report on the magnetic and transport characterization of different NbTi commercial strands, carried out at variable temperature and magnetic field. From the critical current densities extracted from transport measurements and magnetization cycles we were able to calculate the normalized bulk pinning forces. [...]
2010
- Published in : IEEE Trans. Appl. Supercond. 20 (2010) 1496-1499
IEEE Published version, local copy: PDF;
In : 21st International Conference on Magnet Technology, Hefei, China, 18 - 23 Oct 2009, pp.1496-1499
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