2026-01-21
06:33 |
Modelling optics and beam-beam effects of SuperKEKB with Xsuite
/ Salvesen, J P T (CERN ; JAI, UK) ; Iadarola, G (CERN) ; Broggi, G (CERN ; U. Rome La Sapienza (main)) ; Oide, K (CERN) ; Zimmermann, F (CERN) ; Burrows, P N (JAI, UK) ; Sugimoto, H (KEK, Tsukuba)
SuperKEKB, located at KEK, is a second generation B-factory, providing beam to the Belle-II experiment. Optics design and simulation of SuperKEKB were previously performed using the optics code SAD, developed at KEK. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) MOPM034
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM034
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2026-01-21
06:33 |
Impact of the inner triplet polarity on the optics commissioning of the LHC in 2024 and 2025
/ Dilly, Joschua (CERN) ; Calia, Andrea (CERN) ; Mirarchi, Daniele (CERN) ; Jacquet, Delphine (CERN) ; Fol, Elena (CERN) ; Kravishvili, Elene (CERN ; AIM, Saclay) ; Maclean, Ewen (CERN) ; Carlier, Felix (CERN) ; Soubelet, Felix (CERN) ; Trad, Georges (CERN) et al.
To mitigate the risk of radiation damage induced failure while operating the LHC beyond its initial integrated luminosity target, changes to the triplet polarity and crossing angles have been applied in the two main experimental interaction regions of the LHC. This allows for a more distributed radiation deposition in the insertion region magnets, which should allow their survival until they are replaced as part of the High Luminosity LHC upgrade from 2026-2030. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) WEPM013
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.WEPM013
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2026-01-21
06:33 |
Fully experiment request driven beta* and separation luminosity levelling at the LHC
/ Hostettler, Michi (CERN) ; Calia, Andrea (CERN) ; Jacquet, Delphine (CERN)
During the third run period (2022-2026) of the CERN Large Hadron Collider (LHC), as well as for the future High-Luminosity LHC era, luminosity levelling is key to control the event pile-up in the experiments as well as the heat load to the cryogenic system of the superconducting magnets close to the interaction points. During 2024 proton physics operation, a new luminosity levelling scheme was introduced for the high-luminosity experiments, ATLAS and CMS. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) THPS047
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.THPS047
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2026-01-21
06:33 |
Towards a High Luminosity LHC with even higher performance
/ Tomas, Rogelio (CERN) ; Fornara, Andrea (CERN) ; Salvant, Benoit (CERN) ; Lindstrom, Bjorn (CERN) ; Zannini, Carlo (CERN) ; Antuono, Chiara (CERN) ; Hernalsteens, Cédric (CERN) ; Wollmann, Daniel (CERN) ; Maclean, Ewen (CERN) ; Cerutti, Francesco (CERN) et al.
The High Luminosity LHC (HL-LHC) project aims to increase the integrated luminosity of CERN’s Large Hadron Collider (LHC) over its exploitation era up to the end of 2041 by an order of magnitude compared to the initial LHC design value. This requires doubling the bunch intensity along with several other important changes to the LHC configuration. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) MOPM008
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM008
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2026-01-21
06:33 |
First prototype measurements with an electro-optical bunch profile monitor for FCC-ee
/ Reissig, Micha (KIT, Karlsruhe) ; Schloegelhofer, Andreas (CERN) ; Mueller, Anke-Susanne (KIT, Karlsruhe) ; Gilardi, Antonio (CERN) ; Haerer, Bastian (KIT, Karlsruhe) ; Pakuza, Collette (CERN) ; Bründermann, Erik (KIT, Karlsruhe) ; Niehues, Gudrun (KIT, Karlsruhe) ; Grimm, Leander (KIT, Karlsruhe) ; Korysko, Pierre (Oxford U.) et al.
The future circular electron-positron collider (FCC-ee) is designed for highest luminosity to enhance the precision of high-energy particle physics experiments, spanning energies from the Z pole to the $\text{t}\bar{\text{t}}$ threshold. As outlined in its conceptual design report, high-precision measurements of the longitudinal bunch profile are required across multiple operation modes, which presents key challenges for beam instrumentation. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) THPS079
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.THPS079
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2026-01-21
06:33 |
High Luminosity LHC optics: Machine development results
/ Angelis, Yannis (Aristotle U., Thessaloniki ; CERN) ; Lindstrom, Bjorn (CERN) ; Maclean, Ewen (CERN) ; Carlier, Felix (CERN) ; Dilly, Joschua (CERN) ; Skoufaris, Kyriacos (CERN) ; De Maria, Riccardo (CERN) ; Tomas, Rogelio (CERN)
As the High Luminosity LHC (HL-LHC) era approaches, precise control of the accelerator becomes increasingly critical. Machine studies are essential to address the forthcoming challenges and develop correction strategies based on experimental measurements. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) WEPM001
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.WEPM001
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2026-01-21
06:33 |
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2026-01-21
06:33 |
Review of linear and nonlinear optics measurements in the CERN LHC
/ Maclean, Ewen (CERN) ; Wegscheider, Andreas (CERN) ; Nellist, Clara (Amsterdam U.) ; Fol, Elena (CERN) ; Kravishvili, Elene (CERN) ; Waagaard, Elias (CERN) ; Burkhardt, Felix (CERN) ; Carlier, Felix (CERN) ; Soubelet, Felix (CERN) ; Keintzel, Jacqueline (CERN) et al.
The LHC is approaching the end of its third operational run, with machine protection and performance having demanded an excellent control of the single-particle dynamics. Additionally, the requirement to rapidly commission multiple diverse sets of optics configurations within each year, and from year-to-year, placed clear demands on the measurement and correction methods employed. [...]
2025 - 6 p.
- Published in : JACoW IPAC 2025 (2025) FRYD2
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.FRYD2
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2026-01-21
06:33 |
An evaluation of collimation settings for the High Luminosity LHC baseline
/ Donadon Servelle, André (CERN) ; Lindstrom, Bjorn (U. of London, United Kingdom) ; Maccani, Chiara (U. Padua (main)) ; Veres, Dora (Goethe U., Frankfurt (main)) ; Van der Veken, Frederik (Goethe U., Frankfurt (main)) ; Hugo, Gabrielle (CERN) ; Esposito, Luigi Salvatore (CERN) ; Orwat, Marta (U. Edinburgh (main)) ; Triantafyllou, Natalia (CERN) ; Bruce, Roderik (CERN)
In the context of the High Luminosity Large Hadron Collider (HL-LHC) project, two configurations of collimator settings are being considered. A set of relaxed settings were conceived to address potential limitations due to the impedance contribution of the collimation system with the initially foreseen settings, and to increase theprimary betatron cut in case of over-populated beam tails. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) THPB015
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.THPB015
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2026-01-21
06:32 |
Optics tuning of the FCC-ee
/ Tomas, Rogelio (CERN) ; Chance, Antoine (Saclay) ; Dalena, Barbara (Saclay) ; Järmyr Eriksson, Carl (CERN) ; Carli, Christian (CERN) ; Goffing, Christian (CERN) ; Garcia Jaimes, Cristobal Miguel (CERN) ; Musa, Elaf (DESY) ; Ahmadi, Esmaeil (IPM, Tehran) ; Maclean, Ewen (CERN) et al.
The Future Circular Collider, FCC-ee, is a proposed next generation electron-positron collider aiming to provide large luminosities at beam energies from 45.6 up to 182.5 GeV. This collider faces a major challenge to deliver the design performance in the presence of realistic lattice errors. [...]
FERMILAB-CONF-25-0978-PIP2.-
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) MOPM009
Fulltext: PDF; Fulltext From Publisher: PDF; External link: Fermilab Open Access
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM009
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