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 |
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 |
Criticality of powering failure of the main bend circuits in the FCC-ee at the Z-pole energy
/ Domange, Delphine (CERN ; U. Brussels (main)) ; Wiesner, Christoph (CERN) ; Hernalsteens, Cédric (CERN) ; Wollmann, Daniel (CERN) ; Uythoven, Jan (CERN)
The electron-positron Future Circular Collider (FCCee) will have a first phase of operation at the Z-pole energy of 45.6 GeV. To reach the target luminosity, a total of 11200 bunches with $2.14 \times 10^{11}$ charges will be used, accounting for a stored energy of 17.5 MJ per beam. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) MOPM022
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM022
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2026-01-14
06:04 |
Longitudinal wakefield implementation in the circulant matrix model
/ Soos, Roxana (IJCLab, Orsay ; CERN ; U. Paris-Saclay) ; Faus-Golfe, Angeles (IJCLab, Orsay) ; Buffat, Xavier (CERN)
The influence of longitudinal wakefields on the beam dynamics in electron-positron colliders, particularly their role in beam instabilities such as Transverse Mode Coupling Instability (TMCI) and other transverse-longitudinal effects, necessitates a robust approach to accurately model these effects. This work focuses on the implementation of wakefield effects in the Circulant Matrix Model (CMM), a linear model that can facilitate the representation of these instabilities. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) MOPM049
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM049
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2026-01-14
06:04 |
Investigating the Impact of alternative LHC optics on accelerator backgrounds at FASER using BDSIM
/ Keyken, Alex (Royal Holloway, U. of London) ; Lindstrom, Bjorn (Royal Holloway, U. of London) ; Gibson, Stephen (Royal Holloway, U. of London)
Alternative configurations around the ATLAS experiment are investigated aiming to reduce muon rates at forward physics experiments such as FASER and SND@LHC. The Geant4 toolkit BDSIM is used to propagate muons through a model of a section of the LHC and the TI12 tunnel, where the FASER experiment is located. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) WEPS045
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.WEPS045
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2026-01-14
06:04 |
Improving the SPS beam extraction efficiency by implementation of a crystal septum
/ Giacomelli, Matteo Paul (Bologna U.) ; Arrutia Sota, Pablo Andreas (CERN) ; Gorn, Aleksandr (CERN) ; Velotti, Francesco (CERN) ; Fraser, Matthew (CERN) ; Dutheil, Yann (CERN)
The third-integer resonant extraction of the proton beam from the Super Proton Synchrotron (SPS) at CERN is a technique used for slow extraction of the circulating beam, providing a constant spill of protons to the North Area experiments. Currently, this method employs an electrostatic septum (ZS) to separate the extracted particles from the proton beam circulating in the ring. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) TUPB027
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.TUPB027
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2026-01-14
06:04 |
FCC-ee energy calibration and polarization - Status and outlook
/ Keintzel, Jacqueline (CERN) ; Blondel, Alain (Geneva U.) ; Faus-Golfe, Angeles (IJCLab, Orsay) ; Korsun, Anna (IJCLab, Orsay) ; Bogomyagkov, Anton (Unlisted) ; Martens, Aurélien (IJCLab, Orsay) ; Carli, Christian (CERN) ; Kiel, Clara (Ecole Polytechnique, Lausanne) ; Sittard, Daniel (CERN) ; Gaskell, Dave (Jefferson Lab) et al.
The Future electron-positron Circular Collider, FCC-ee, aims at high-precision particle physics experiments with beam energies from 45.6 to 182.5 GeV, corresponding to the Z-pole up to above the top-pair-threshold. These goals demand, among others, a precise knowledge of the center-of-mass energy and, hence, the beam energies. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) MOPM007
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM007
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