2026-01-14
06:05 |
Beam-based beam-beam benchmarking and correction
/ Maclean, Ewen (CERN) ; Burkhardt, Felix (CERN) ; Sterbini, Guido (CERN) ; Paraschou, Konstantinos (CERN) ; Tomas, Rogelio (CERN) ; Horney, Sasha (CERN) ; Persson, Tobias (CERN)
Optics studies in the LHC are generally performed on low-intensity, non-colliding beams. Understanding the optics perturbation from beam-beam effects however, is of significant interest. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) WEPM010
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.WEPM010
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2026-01-14
06:05 |
Luminosity modeling of the LHC operation and performance projections for HL-LHC
/ Kostoglou, Sofia (CERN) ; Sterbini, Guido (CERN) ; Bartosik, Hannes (CERN) ; Efthymiopoulos, Ilias (CERN) ; Mounet, Nicolas (CERN) ; Tomas, Rogelio (CERN) ; De Maria, R (CERN)
The LHC luminosity model is a powerful tool for studying the evolution of beam and machine parameters during the LHC operation. The model includes important effects that are present in LHC operation such as Intra-Beam Scattering, synchrotron radiation and burn-off. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) WEPM045
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.WEPM045
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2026-01-14
06:05 |
Measuring single-pass dispersion in the LHC
/ De Souza, Vitor (LNLS, Campinas) ; Persson, Tobias (CERN) ; Tomas, Rogelio (CERN) ; Maclean, Ewen (CERN)
During the LHC Ion Run in 2023, the ALICE detector observed a high level of background that prevented efficient data taking. This background was caused by different ion species generated in the betatronic collimation region that were intercepted by the Tertiary collimator near ALICE Interaction Point. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) THPS078
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.THPS078
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2026-01-14
06:05 |
Simulations of losses from fast instabilities in the FCC-ee
/ Nigrelli, Giulia (CERN ; U. Rome La Sapienza (main) ; Frascati) ; Broggi, Giacomo (CERN ; Frascati ; U. Rome La Sapienza (main)) ; Boscolo, Manuela (Frascati) ; Bruce, Roderik (CERN) ; Redaelli, Stefano (CERN) ; Buffat, Xavier (CERN)
The electron-positron Future Circular Collider (FCC-ee) is a proposed high-energy lepton collider that aims to reach unprecedented luminosity and precision in the measurement of fundamental particles. To fully profit of such performance, it is crucial to keep detector backgrounds under control and operate the machine safely. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) MOPM032
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM032
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2026-01-14
06:04 |
Integration of the HL-LHC machine and its services within the existing LHC tunnel: Challenges and proposed approaches for the integration of a large-scale project
/ Nicoletti, Francesca Paola (CERN) ; Ramrekha, Darshana (CERN) ; Corso, Jean-Pierre (CERN) ; Oliveira, Joao (CERN) ; Coupard, Julie (CERN) ; Modena, Michele (CERN) ; Navarro Baeza, Miguel (CERN) ; Joannon, Nicolas (Unlisted, CH) ; Fessia, Paolo (CERN) ; Maridor, Stephane (CERN)
The High Luminosity Large Hadron Collider (HL-LHC) project is a major upgrade of the LHC presently operating at CERN, designed to enhance the performance reach in terms of integrated luminosity collected during its operational era by another order of magnitude. It involves the replacement of the entire machine and services over more than 200 meters on each side of the high luminosity experiments of ATLAS and CMS, and other modifications across the entire LHC complex. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) THPB022
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.THPB022
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2026-01-14
06:04 |
Lattice correction and polarization estimation for the future circular collider e+e-
/ Wu, Yi (Ecole Polytechnique, Lausanne) ; van Riesen-Haupt, Léon (CERN) ; Seidel, Mike (PSI, Villigen) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne)
Precise determination of the center-of-mass energy at the Future Circular Collider (FCC-ee) operating at the Z and W resonance energies relies on resonant spin depolarization techniques, which require a sufficient level of transverse beam polarization in the presence of machine imperfections. In this study, the FCC-ee lattice is modeled and simulated under a range of realistic imperfections, complemented by refined orbit correction and tune-matching procedures. [...]
2025 - 3 p.
- Published in : JACoW IPAC 2025 (2025) MOPM003
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM003
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2026-01-14
06:04 |
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2026-01-14
06:04 |
Study of the coherent < x-z > instabilities for FCC-ee
/ Soos, Roxana (IJCLab, Orsay ; CERN ; U. Paris-Saclay) ; Faus-Golfe, Angeles (IJCLab, Orsay) ; Buffat, Xavier (CERN)
This work examines the dominant coherent head-tail type (< x-z >) instabilities in the vertical plane of the FCC-ee collider, focusing on a mode analysis method with the Circulant Matrix Model (CMM) to assess instability mechanisms under the influence of beam-beam effects and transverse wakefields. While the impact of vertical plane instabilities have been already studied, different mechanisms are prominent in the horizontal plane. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) MOPM048
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM048
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2026-01-14
06:04 |
Beam losses due to beam-residual gas interactions in the FCC-ee
/ Broggi, Giacomo (CERN ; U. Rome La Sapienza (main) ; Frascati) ; Abramov, Andrey (CERN) ; Boscolo, Manuela (Frascati) ; Kersevan, Roberto (CERN) ; Bruce, Roderik (CERN) ; Redaelli, Stefano (CERN)
The Future Circular electron-positron Collider, FCC-ee, is a design study for a luminosity-frontier and highest-energy e+e- collider with a 91 km circumference. In a circular machine, the interactions between the beam particles and the residual gas in the vacuum chamber may degrade the beam quality, potentially affecting the beam lifetime and the collider luminosity, and cause local beam losses. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) MOPM036
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM036
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2026-01-14
06:04 |
Feasibility of kicker systems for FCC-ee and injectors
/ Kramer, Thomas (CERN) ; Standen, Dylan (CERN) ; Favia, Giorgia (CERN) ; Ruf, Johannes (CERN) ; Papastergiou, Konstantinos (CERN) ; Ducimetière, Laurent (CERN) ; Trubacova, Pavlina (CERN) ; Martinek, Petr (CERN) ; Yue, Sen (CERN) ; Dutheil, Yann (CERN)
CERN’s Future Circular Collider (FCC) comprises a ~91 km circumference lepton collider and its injector complex. This contribution summarises the feasibility studies performed for the various kicker systems needed to transfer the beam between the different machines. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) MOPM065
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM065
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