2026-02-03
07:21 |
The future of the CLEAR facility: consolidation, ongoing upgrades and its evolution towards future electron facilities at CERN
/ Corsini, Roberto (CERN) ; Farabolini, Wilfrid (CERN) ; Gamba, Davide (CERN) ; Gilardi, Antonio (Naples U.) ; Granados, Eduardo (CERN) ; Aksoy, Avni (CERN) ; Franek, Ondrej (CERN ; CTU, Prague) ; Korysko, Pierre (CERN) ; Malyzhenkov, Alexander (CERN) ; Mazzoni, Stefano (CERN) et al.
The CERN Linear Accelerator for Research (CLEAR) is a versatile 200 MeV electron linac followed by an experimental beam-line, operated at CERN as a user facility. Its user community includes research groups working on beam instrumentation R&D;, advanced acceleration techniques and irradiation studies, including medical applications. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) TUPM027
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.TUPM027
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2026-02-03
07:21 |
Data-driven hysteresis compensation in the CERN SPS main magnets
/ Lu, Anton (CERN ; TU Vienna) ; Kain, Verena (CERN) ; Petrone, Carlo (CERN) ; Di Capua, Vincenzo (CERN) ; Schenk, Michael (CERN) ; Taupadel, Maurus (CERN ; Darmstadt, Tech. U.)
Magnetic hysteresis and eddy current decay continue to challenge beam quality and operational consistency in multi-cycling machines like the Super Proton Synchrotron (SPS) at CERN. Building on our previous work, this paper presents improvements in the data-driven approach for magnetic field modelling to enhance the reproducibility of SPS dipole and quadrupole fields and thus maintain stable beam parameters across all operational cycles. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) WEAN2
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.WEAN2
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2026-02-03
07:21 |
Virtual temperature measurements of ferrite in in-vacuum kicker magnets
/ Velotti, Francesco (CERN) ; Huhn, Francisco (CERN) ; Favia, Giorgia (CERN) ; Ragkousis, Kleanthis (CERN) ; Diaz Zumel, Miguel (CERN) ; Arrutia Sota, Pablo Andreas (CERN) ; Trubacova, Pavlina (CERN)
The Large Hadron Collider (LHC) Injector Upgrade project has achieved unprecedented beam brightness levels, to fulfill the High Luminosity LHC requirements. This higher intensity has introduced significant challenges for some of the Super Proton Synchrotron (SPS) kickers, specifically concerning beam-induced heating and vacuum rise due to electron cloud.The primary concern is the integrity of the ferrite within the kicker magnets, which is critical to the system's operation and availability. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) THPM008
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.THPM008
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2026-02-03
07:21 |
First results of the new eddy current septum for the CERN PS fast extraction
/ Borburgh, Jan (CERN) ; Balhan, Bruno (CERN) ; Lackner, Friedrich (CERN) ; Gräwer, Gregor (CERN) ; Plett, Jonathan (RWTH Aachen U.) ; Ducimetière, Laurent (CERN) ; Porta, Lucien (CERN) ; Strobino, Léa (CERN) ; Atanasov, Miroslav (CERN) ; Yagci, Omer Yusuf (CERN) et al.
CERN has developed a new fast pulsed septum magnet to replace the aging PS proton extraction septum. The aim is to increase the refurbishment intervals of the magnet and to phase out the old power converter, while allowing energy savings during operation.The new system includes a novel under vacuum eddy current septum magnet, a new third-harmonic fast pulse generator and dedicated control system with post pulse fault analysis for achieving the required flat top precision.This paper will briefly describe the system development and focus on the lessons learned from its construction and report the results of the testing phase..
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) TUPB017
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.TUPB017
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2026-02-03
07:21 |
A helium-cooled target design for the SPS Beam Dump Facility (BDF) at CERN
/ Parkin, Michael (CERN) ; Romero Francia, Alvaro (CERN) ; Corbett, Benjamin (Daresbury) ; Pittet, Benjamin (CERN) ; Mucher, Christophe (CERN) ; Ahdida, Claudia (CERN) ; Grenier, Damien (CERN) ; Berthome, Emmanuel (CERN) ; Rodriguez-Castro, Enrique (CERN) ; Dragoni, Francesco (CERN) et al.
CERN’s upcoming SPS Beam Dump Facility (BDF) will host a production target designed to manage challenging thermal and mechanical conditions while providing the physics output required by the Search for Hidden Particles (SHiP) experiment. It must fully absorb 400 GeV/c protons and dissipate up to 305 kW. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) THPB059
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.THPB059
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2026-02-03
07:21 |
Metamaterial absorbers for beam-coupling impedance mitigation
/ Sito, Leonardo (CERN ; U. Naples (main)) ; Salvant, Benoit (CERN) ; Zannini, Carlo (CERN) ; Fienga, Francesco (CERN ; U. Naples (main)) ; Breglio, Giovanni (CERN ; U. Naples (main)) ; Marrazzo, Vincenzo Romano (CERN ; U. Naples (main))
Charged particle bunches traversing cavity-like discontinuities in the beam pipe at relativistic velocities excite electromagnetic resonant modes that can detrimentally affect the dynamics of trailing bunches. This beam-cavity interaction, characterized in the frequency domain through the concept of beam-coupling impedance, poses significant challenges for beam stability and performance in high-energy particle accelerators. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) WEPM085
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.WEPM085
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2026-02-03
07:21 |
Measurements of dark current and breakdown phenomena using Faraday cups at the Xband Laboratory for Accelerators and Beams (XLAB)
/ Giansiracusa, Paul (Melbourne U. ; Unlisted, AU) ; Taylor, Geoffrey (Melbourne U.) ; Valerian, Joel (Melbourne U.) ; Volpi, Matteo (Melbourne U.) ; Pushkarna, Paarangat (Melbourne U.) ; Rassool, Roger (Melbourne U.) ; Dowd, Rohan (Unlisted, AU) ; Sheehy, Suzanne (Unlisted, AU ; Melbourne U.) ; Tan, Yaw-Ren (Unlisted, AU)
Two CLIC TD24 accelerating structures, manufactured by CERN, are being tested on the high gradient 12 GHz RF test stand at XLAB. Installed at the end of 2024, these are the first devices to be tested at XLAB. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) THPS108
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.THPS108
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2026-02-03
07:21 |
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2026-02-03
07:21 |
Photoinjector beam halo formation due to a secondary picosecond time-delayed laser pulse
/ Musat, Vlad (CERN) ; Latina, Andrea (CERN) ; Granados, Eduardo (CERN) ; Burrows, Philip (JAI, UK) ; Doebert, Steffen (CERN)
Beam halo formation is a significant challenge for high-intensity accelerators, as it can lead to performance degradation and radiation safety risks. This study investigates the formation and mitigation of beam halos caused by a picosecond time-delayed laser pulse, which generates a secondary electron bunch in the same RF bucket as the main bunch. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) WEPS010
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.WEPS010
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2026-02-03
07:21 |
Time-varying Bayesian optimisation for continual optimal injection in the CERN PS Booster
/ Huhn, Francisco (CERN) ; Bracco, Chiara (CERN) ; Velotti, Francesco (CERN)
The Proton Synchrotron Booster (PSB) receives 160 MeV H- ions, which are converted to protons at injection via a charge exchange mechanism, an upgrade that allows the production of low-loss high-intensity beams (> 10^13 per ring). To mitigate losses due to space charge, horizontal phase-space painting is performed with a system of fours kickers whose pulse is customisable via time and amplitude parameters.Recent work has shown that classical optimisation algorithms can find the optimal parameter values on both a digital twin and the real machine. [...]
2025 - 4 p.
- Published in : JACoW IPAC 2025 (2025) THPM007
Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.THPM007
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