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Cryogenic architecture and heat loads for the High-Luminosity upgrade of the Large Hadron Collider (HL- LHC) at CERN
/ Gahier, Vanessa (CERN) ; Brodzinski, Krzysztof (CERN) ; Claudet, Serge (CERN) ; Delprat, Laurent (CERN) ; Lees, Andrew (CERN) ; Monneret, Emmanuel (CERN) ; Perin, Antonio (CERN) ; Sisti, Michele (CERN) ; Van Weelderen, Rob (CERN)
The High-Luminosity upgrade of the Large Hadron Collider (HL-LHC) at CERN is a major upgrade project of the LHC accelerator, which will allow increasing the peak luminosity by at least a factor of five beyond LHC’s design value. This upgrade will include the replacement of the final focusing superconducting magnets and the implementation of superconducting radiofrequency crab cavities in the long straight sections of the interaction points 1 and 5 of LHC. [...]
2025 - 6 p.
- Published in : IOP Conf. Ser. Mater. Sci. Eng.: 1327 (2025) , no. 1, pp. 012003
Fulltext: PDF;
In : 29th International Cryogenic Engineering Conference and International Cryogenic Materials Conference 2024, Geneva, Switzerland, 22 - 26 July 2024, pp.012003
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The Cryogenic Distribution System for the High Luminosity LHC upgrade at CERN
/ Sisti, M (CERN) ; Claudet, S (CERN) ; Metselaar, J (CERN) ; Lees, A (CERN) ; Merli, F (CERN) ; Perin, A (CERN) ; Gahier, V (CERN)
The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) will require the replacement of the final focusing superconducting magnets, the implementation of new superconducting links to power the magnets and the implementation of new Superconducting Radio-Frequency (SRF) crab cavities, totalling a length of about 150 m on both sides of the collision points of the ATLAS (P1) and of the CMS (P5) experiments in the LHC accelerator. To cool the new and reconfigured cryogenic devices, a new Cryogenic Distribution System will replace the existing LHC cryogenic distribution line on each side of the experiments. [...]
2025 - 6 p.
- Published in : IOP Conf. Ser. Mater. Sci. Eng.: 1327 (2025) , no. 1, pp. 012114
Fulltext: PDF;
In : 29th International Cryogenic Engineering Conference and International Cryogenic Materials Conference 2024, Geneva, Switzerland, 22 - 26 July 2024, pp.012114
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Detailed study of the cryogenic jumper connections between the cryogenic distribution line and the superconducting magnets of the High Luminosity LHC upgrade at CERN
/ Merli, F (CERN) ; Claudet, S (CERN) ; Ramos, D (CERN) ; Lees, A (CERN) ; Perin, A (CERN) ; Prin, H (CERN) ; Sisti, M (CERN)
The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) project will require a new cryogenic system to cool the new superconducting components in the final focusing regions for the ATLAS and the CMS experiments. New superconducting magnets operating in pressurized HeII at 1.9 K will replace the existing ones and each magnet will generate heat loads of several hundred watts. [...]
2025 - 6 p.
- Published in : IOP Conf. Ser. Mater. Sci. Eng.: 1327 (2025) , no. 1, pp. 012123
Fulltext: PDF;
In : 29th International Cryogenic Engineering Conference and International Cryogenic Materials Conference 2024, Geneva, Switzerland, 22 - 26 July 2024, pp.012123
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Chapter 14: Cryogenics for the HL-LHC
/ Claudet, S (CERN) ; Ferlin, G (CERN) ; Monneret, E (CERN) ; Perin, A (CERN) ; Sisti, M (CERN) ; Van Weelderen, R (CERN) ; Lees, A (CERN) ; Gahier, V (CERN) ; Brodzinski, K (CERN) ; Delprat, L (CERN)
The discovery of a Higgs boson at CERN in 2012 was the start of a major program working to measure this particle’s properties with the highest possible precision for testing the validity of the Standard Model and to search for further new physics at the energy frontier. The LHC is in a unique position to pursue this program. [...]
2024 - 14 p.
- Published in : Adv. Ser. Direct. High Energy Phys. 31 (2024) 341-354
Fulltext: PDF;
In : The High Luminosity Large Hadron Collider, pp.341-354
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LHC Upgrades in preparation of Run 3
/ Arduini, G (CERN) ; Baglin, V (CERN) ; Bartosik, H (CERN) ; Bottura, L (CERN) ; Bracco, C (CERN) ; Bradu, B (CERN) ; Bregliozzi, G (CERN) ; Brodzinski, K (CERN) ; Bruce, R (CERN) ; Calviani, M (CERN) et al.
The Large Hadron Collider (LHC) Long Shutdown 2(2019–2021), following LHC Run 2, was primarily dedicated to theupgrade of the LHC Injectors but it included also a significantamount of activities aimed at consolidation of the LHC machinecomponents, removal of known limitations and initial upgrades inview of the High-Luminosity LHC (HL-LHC) to favour the intensityramp-up during Run 3 (2022–2025). An overview of the majormodifications to the accelerator and its systems is followed by asummary of the results of the superconducting magnet trainingcampaign to increase the LHC operation energy beyond the maximumvalue of 6.5 TeV reached during Run 2. [...]
2024 - 138 p.
- Published in : JINST 19 (2024) P05061
Fulltext: PDF;
In : The Large Hadron Collider and The Experiments for Run 3, pp.P05061
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Assessment of the operation safety margin of the HL-LHC superconducting recombination Dipole D2 in case of helium filling failure
/ Rousset, B (IRIG, Grenoble) ; Bancel, F (IRIG, Grenoble) ; Besson, N (IRIG, Grenoble) ; Bon-Mardion, M (IRIG, Grenoble) ; Claudet, S (CERN) ; Goy, T (IRIG, Grenoble) ; Millet, F (IRIG, Grenoble) ; Nivelon, P (IRIG, Grenoble) ; Perin, A (CERN)
After the successful completion of the cryogenic performance tests of the He II heat exchanger prototype for the D2 recombination dipole of the future HL-LHC project at CERN, specific measurements were performed to determine the operation safety margin in case of abnormal operating conditions. This is particularly relevant in case of the failure of liquid helium supply in the He II cold source. [...]
2022 - 8 p.
- Published in : IOP Conf. Ser. Mater. Sci. Eng. 1240 (2022) 012121
Fulltext: PDF;
In : Cryogenic Engineering Conference and International Cryogenic Materials Conference, Online, 19 - 23 Jul 2021, pp.012121
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Cryogenic performances of a heat exchanger prototype suitable for the superconducting HL-LHC recombination dipole D2
/ Rousset, B (IRIG, Grenoble) ; Bancel, F (IRIG, Grenoble) ; Besson, N (IRIG, Grenoble) ; Bon-Mardion, M (IRIG, Grenoble) ; Claudet, S (CERN) ; Goy, T (IRIG, Grenoble) ; Millet, F (IRIG, Grenoble) ; Nivelon, P (IRIG, Grenoble) ; Perin, A (CERN)
In the framework of the future High Luminosity upgrade of the Large Hadron Collider (HL-LHC) at CERN, most superconducting magnets in the Long Straight Sections will be replaced. Among them, the new D2 recombination dipole will be a He II conduction-cooled magnet with a larger aperture than the LHC dipoles. [...]
2022 - 7 p.
- Published in : IOP Conf. Ser. Mater. Sci. Eng. 1240 (2022) 012120
Fulltext: PDF;
In : Cryogenic Engineering Conference and International Cryogenic Materials Conference, Online, 19 - 23 Jul 2021, pp.012120
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