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1.
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.
Not yet available
 Powering infrastructures / Yammine, Samer (speaker) (CERN)
Power converters play a central role in particle accelerators where both their performances are directly linked. As accelerator complexes develop towards higher beam energies and a more sustainable nature, in response to the needs of physics research and of reducing the environmental impact, power converters are required to be on the forefront of technology. [...]
2023 - 2960. CERN Accelerator School; CAS course on "Normal- and Superconducting Magnets", 19 November - 02 December 2023, St. Pölten, Austria External links: Talk details; Event details In : CAS course on "Normal- and Superconducting Magnets", 19 November - 02 December 2023, St. Pölten, Austria
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3.
Quench Protection of the HL-LHC Hollow Electron Lens Superconducting Solenoid Magnets / Wozniak, Mariusz (CERN) ; Foussat, Arnaud (CERN) ; Yammine, Samer (CERN) ; Steckert, Jens (CERN) ; Ravaioli, Emmanuele (CERN) ; Verweij, Arjan (CERN) ; Kolehmainen, Antti (CERN) ; Redaelli, Stefano (CERN) ; Rossi, Adriana (CERN)
The High-Luminosity LHC (HL-LHC) project is an upgrade of the Large Hadron Collider (LHC) and comprises the installation of two Hollow Electron Lens (HEL) systems, each acting on one beam on both sides of LHC Point 4. The systems aim for a controlled depletion of hadron beam tails and an enhanced hadron beam halo collimation. [...]
2022 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4701205
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4701205
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4.
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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5.
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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6.
Modelling and Control of the HL-LHC Nested Magnet Circuits at CERN / Yammine, Samer (CERN) ; Thiesen, Hugues (CERN)
In the scope of the High Luminosity - Large Hadron Collider project at CERN, six new superconducting quadrupole electromagnets are required for the final focusing of the beam before proton-to-proton collisions. To optimize the powering scheme, the quadrupoles will be powered in series by one high-current two-quadrant converter. [...]
2019 - 6 p. - Published in : 10.1109/COMPEL.2019.8769677
In : 20th Workshop on Control and Modeling for Power Electronics, Toronto, Canada, 16 - 19 Jun 2019, pp.1-6
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7.
Simulation of a quench event in the upgraded High-Luminosity LHC Main dipole circuit including the 11 T Nb$_{3}$Sn dipole magnets / Fernandez Navarro, Alejandro Manuel (CERN) ; Maciejewski, Michal (CERN) ; Verweij, Arjan P (CERN) ; Bortot, Lorenzo (CERN) ; Mentink, Matthias (CERN) ; Prioli, Marco (CERN) ; Auchmann, Bernhard (PSI, Villigen) ; Izquierdo Bermudez, Susana (CERN) ; Ravaioli, Emmanuele (LBNL, Berkeley) ; Yammine, Samer (CERN)
To achieve the goal of increased luminosity, two out of eight main dipole circuits of the accelerator will be reconfigured in the coming LHC upgrade by replacing one standard 14.3-m long, Nb-Ti-based, 8.3 T dipole magnet by two 5.3-m long, Nb$_{3}$Sn-based, 11.2 T magnets (MBH). The modified dipole circuits will contain 153 Nb-Ti magnets and two MBH magnets. [...]
2018 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4702605
In : 13th European Conference on Applied Superconductivity, ICCG, Geneva, Switzerland, 17 - 21 Sep 2017, pp.4702605
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8.
HL-LHC Inner Triplet Powering and Control Strategy / Yammine, Samer (CERN) ; Thiesen, Hugues (CERN)
In order to achieve the target 3000 fb-1 integrated field for the HL-LHC (High Luminosity ' Large Hadron Collider) at ATLAS and CMS, new large aperture quadrupoles are required for the final focusing triplet magnets before the interaction points. These low-' magnets, based on the Nb$_{3}$Sn technology, deliver a peak field of 11.4 T. [...]
CERN-ACC-2017-215.- 2017 - 3 p. - Published in : 10.18429/JACoW-IPAC2017-WEPVA116 Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.WEPVA116
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