CERN Accelerating science

HL-LHC Conference Papers

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2025-07-08
10:02
Advances in transverse beam halo characterization and implications for HL-LHC / Rakic, M (CERN ; Ecole Polytechnique, Lausanne) ; Hermes, P (CERN) ; Redaelli, S (CERN) ; Seidel, M (PSI, Villigen)
Measurements of the transverse beam halo in the LHC showed that it contains a non-negligible portion of the total stored beam energy, with implications for both collimation system performance and overall machine protection. [...]
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JACoW - Full text

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2025-07-08
10:02
High Luminosity LHC Optics Feasibility Studies for: ATLAS, ALICE, and LHCb / Patel, Pragati (Cracow, INP) ; Trzebiński, Maciej (Cracow, INP)
Properties of proton trajectories along the High Luminosity LHC beam-line in the vicinity of ATLAS, ALICE, and LHCb interaction points are discussed. Based on this, possible locations of forward proton detectors in the vicinity of these experiments were identified. [...]
2024 - 6 p. - Published in : Acta Phys. Pol. B Proc. Suppl. 17 (2024) 5-A30 External link: Fulltext
In : 30th Cracow Epiphany Conference on Precision Physics at High Energy Colliders: dedicated to the memory of Staszek Jadach (Epiphany 2024), Cracow, Poland, 8 - 12 Jan 2024, pp.5-A30

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2025-05-21
06:01
Development, Fabrication & Test of the Round, Multi-Layer REBCO Cables of the Cold Powering Systems of the HL-LHC / Barth, C (CERN) ; Saba, A (CERN) ; Leclercq, Y (CERN) ; Ballarino, A (CERN)
The magnets of the High Luminosity Upgrade of the Large Hadron collider (HL-LHC) will be electrically connected through Cold Powering Systems incorporating superconducting, 100 kA class, power transmission lines to direct current power converters in service galleries. These transmission lines or ‘Superconducting Links’ are based on multi-circuit magnesium di-boride ($\text{MgB}_{2}$) cables in 74.5–120 m long flexible cryostats. [...]
2025 - 5 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.4801605

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2025-05-21
06:01
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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2025-05-21
06:01
Status of High-Field Rutherford Cable Production for the HL-LHC Project / Fleiter, J (CERN) ; Bonasia, A (CERN) ; Hopkins, S C (CERN) ; Boutboul, T (CERN) ; Ballarino, A (CERN)
The High-Luminosity upgrade of the Large Hadron Collider (HL-LHC) is underway at CERN. The upgrade will rely, among other magnets, on the inner triplet quadrupoles (MQXF). [...]
2025 - 5 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.4801505

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2025-02-01
06:02
Prospects for light-ion operation at the HL-LHC: machine developments and physics opportunities / Alemany Fernandez, Reyes (CERN)
In recent years, the interest of the ion-physics community for conducting experiments at the CERN Accelerator Complex with lighter ions than lead has increased significantly. This has motivated the creation of the Future Ions Working Group in the CERN Accelerator and Technical Sector whose mandate is to define future ion operation needs based on the requests from LHC and fixed target experiments and their implications for the Ion Accelerator Complex. [...]
2025 - 6 p. - Published in : PoS LHCP2024 (2025) 335 Fulltext: PDF;
In : 12th Edition of the Large Hadron Collider Physics Conference (LHCP2024), Boston, United States, 3 - 7 Jun 2024, pp.335

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2024-12-18
06:05
Evolving the LHCOPN and LHCONE networks to support HL-LHC computing requirements / Martelli, Edoardo (CERN)
The LHCOPN network, which links CERN to all the WLCG Tier 1s, and the LHCONE network, which connects WLCG Tier1s and Tier2s, have successfully provided the necessary bandwidth for the distribution of the data generated by the LHC experiments during first two runs of the LHC accelerator. We give here an overview of the most significant achievements and the current state of the two networks. [...]
2024 - 8 p. - Published in : EPJ Web Conf. 295 (2024) 07016 Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.07016

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2024-11-28
06:06
Mitigation Strategies for the Instabilities Induced by the Fundamental Mode of the HL-LHC Crab Cavities / Giacomel, Lorenzo (CERN) ; Baudrenghien, Philippe (CERN) ; Buffat, Xavier (CERN) ; Calaga, Rama (CERN) ; Mounet, Nicolas (CERN)
The transverse impedance is one of the potentially limiting effects for the performance of the High-Luminosity Large Hadron Collider (HL-LHC). In the current LHC, the impedance is dominated by the resistive-wall contribution of the collimators at typical bunch-spectrum frequencies, and is of broad-band nature. [...]
2024 - 4 p. - Published in : JACoW HB 2023 (2024) 571-574 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.571-574

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2024-11-26
04:00
The CMS Fast Beam Condition Monitor for HL-LHC / Auzinger, G. (CERN) ; Bakhshiansohi, H. (Isfahan Tech. U.) ; Dabrowski, A. (CERN) ; Delannoy, A.G. (Oxford U.) ; Dierlamm, A. (KIT, Karlsruhe, IKP) ; Dragicevic, M. (Vienna, OAW) ; Gholami, A. (Isfahan Tech. U.) ; Gomez, G. (Cantabria Inst. of Phys.) ; Guthoff, M. (DESY) ; Haranko, M. (CERN) et al.
The high-luminosity upgrade of the LHC brings unprecedented requirements for real-time andprecision bunch-by-bunch online luminosity measurement and beam-induced background monitoring. Akey component of the CMS Beam Radiation, Instrumentation and Luminosity system is a stand-aloneluminometer, the Fast Beam Condition Monitor (FBCM), which is fully independent from the CMScentral trigger and data acquisition services and able to operate at all times with a triggerlessreadout. [...]
arXiv:2402.03971.- 2024-03-19 - 12 p. - Published in : JINST
Fulltext: document - PDF; 2402.03971 - PDF;
In : 16th Topical Seminar on Innovative Particle and Radiation Detectors, Siena, Italy, 25 - 29 Sep 2023, pp.C03048

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2024-10-11
07:15
Design, manufacturing and validation of the new quench heater discharge power supplies for the protection of superconducting magnets for the High-Luminosity LHC Project at CERN / Carrillo, David (CERN) ; Berberat, Raphael (CERN) ; Georgakakis, Spyridon (CERN) ; Guasch-Martinez, Josep (CERN) ; Lopez Cordoncillo, Denisse (CERN) ; de Nicolás Lumbreras, Enrique (CERN) ; Nowak, Edward (CERN) ; Papamichali, Maria (CERN) ; Pojer, Mirko (CERN) ; Rodriguez Mateos, Felix (CERN) et al.
The Quench Heater Discharge Power Supplies (HDS) are magnet protection devices installed in the Large Hadron Collider (LHC) that, upon detection of a magnet quench, release energy into strip heaters that are in thermal contact with the superconducting coils, inducing a resistive transition all along the coils. The new HDS design for protection of the High Luminosity LHC (HL-LHC) Inner Triplet magnets calls for a more advanced design with up-to-date components resulting in a high reliability of the HDS units. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) THPG52 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.THPG52

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