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1.
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Safety at HL-LHC IT String during construction, commissioning, and operation
/ Bozzini, D (CERN) ; Bajko, M (CERN) ; Ballarino, A (CERN) ; Blanchard, S (CERN) ; Gascon, J (CERN) ; Heredia, N (CERN) ; Onufrena, A (CERN) ; Perin, A (CERN) ; Rodriguez Mateos, F (CERN) ; Yammine, S (CERN) et al.
The HL-LHC IT String, a test facility for the major components of the HL-LHC Inner Triplet, is currently in its construction and commissioning phases in a surface building at CERN. The primary motivation of the HL-LHC IT String is to study and validate the collective behaviour of its different subsystems which include mainly: the inner triplet superconducting magnets and their correctors, a novel superconducting link, the cryogenics infrastructure for the cooling and quench recovery, the powering and quench protection systems, and the remote alignment system. [...]
2025 - 6 p.
- Published in : IOP Conf. Ser. Mater. Sci. Eng. 1327 (2025) 012189
Fulltext: PDF;
In : 26th International Cryogenic Engineering Conference and International Cryogenic Materials Conference 2024, Geneva, Switzerland, 22 - 26 July 2024, pp.012189
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2.
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Project Quality Management for the HL-LHC IT String
/ Garcia, Nicolas Heredia (CERN) ; Bajko, Marta (CERN) ; Blanchard, Sebastien (CERN) ; Bozzini, Davide (CERN) ; Brüning, Oliver (CERN) ; Gavela, Hector Garcia (CERN) ; Humbria, Victor Guillen (CERN) ; Kosmicki, Antoine (CERN) ; Fernandez, Estrella Vergara (CERN) ; Yammine, Samer (CERN) et al.
This article explores the project management quality standards required for leading complex technical projects involving state-of-the art superconducting technologies, diverse stakeholders and extensive installation, commissioning, and quality assurance/ control activities. Specifically, it presents the project management framework – including processes and best practices – implemented for the High-Luminosity Large Hadron Collider (HL-LHC) Inner Triplet (IT) String test stand at CERN. [...]
2025 - 6 p.
- Published in : IEEE Trans. Appl. Supercond.
- Published in : IEEE Trans. Appl. Supercond.
In : Applied Superconductivity Conference (ASC 2024), Salt Lake City, Utah, United States, 1 - 6 Sep 2024, pp.4003506
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3.
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Transforming Concept into Reality: Overcoming Challenges in the HL-LHC IT String Test Stand Implementation
/ Bajko, M (CERN) ; Blanchard, S (CERN) ; Bozzini, D (CERN) ; Bruning, O (CERN) ; Garcia, N Heredia (CERN) ; Zerlauth, M (CERN) ; Yammine, S (CERN)
The objective of the High-Luminosity Large Hadron Collider (HL-LHC) Inner Triplet (IT) String is to faithfully represent and validate, within a surface building at CERN, the installation and collective behavior of all major systems in the new HL-LHC IT zone. These systems encompass superconducting magnets, protection, cryogenics for the superconducting magnets and the superconducting link, powering, vacuum, alignment, interconnections between magnets, and the superconducting link itself. [...]
2025 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 35 (2025) 1-5
Fulltext: PDF;
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4.
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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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5.
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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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6.
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Chapter 9: Circuit Layout, Powering and Protection
/ Mateos, F Rodríguez (CERN) ; Rosa, T D Catalão Da (Unlisted, CH) ; Cámara, F Menéndez (Unlisted, CH) ; Yammine, S (CERN) ; Zerlauth, M (CERN)
The HL-LHC upgrade will impose changes to the magnet circuits in Points 1, 5 and 7 with respect to the present LHC configuration. This chapter describes those changes and describes the powering characteristics and protection strategies applicable to the new magnet circuits. [...]
2024 - 12 p.
- Published in : Adv. Ser. Direct. High Energy Phys. 31 (2024) 255-266
Fulltext: PDF;
In : The High Luminosity Large Hadron Collider, pp.255-266
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7.
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8.
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Experimental Program of the HL-LHC Inner Triplet String Test at CERN
/ Yammine, S (CERN) ; Bajko, M (CERN) ; Ballarino, A (CERN) ; Bednarek, M J (CERN) ; Bozzini, D (CERN) ; Blanchard, S (CERN) ; Brüning, O (CERN) ; Cruikshank, P (CERN) ; Denz, R (CERN) ; Ramos, D Duarte (CERN) et al.
This contribution describes the experimental program already undergoing and to be completed on the High Luminosity Large Hadron Collider (HL-LHC) Inner Triplet (IT) String, an important intermediate milestone of the HL-LHC project at CERN. First, it describes the magnet circuits of the HL-LHC IT String. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4001505
Fulltext: PDF;
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9.
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HL-LHC IT STRING: Status and Perspectives
/ Bajko, M (CERN) ; Baglin, V (CERN) ; Ballarino, A (CERN) ; Bednarek, M J (CERN) ; Bertolasi, S (CERN) ; Bertone, C (CERN) ; Blanchard, S (CERN) ; Bozzini, D (CERN) ; Coulot, E (CERN) ; Coupat, C (CERN) et al.
The HL-LHC IT STRING, an integrated test stand for the major components of the HL-LHC Inner Triplet (IT) zone, is in its construction phase in a surface building at CERN. The main motivation is to study and validate the collective behavior of the different systems: magnets, circuit protection, cryogenics for magnets and superconducting link, magnet powering, vacuum, alignment, and interconnections between magnets and superconducting link. [...]
2024 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 9001306
Fulltext: PDF;
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10.
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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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