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Accelerator Physics

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2026-01-22
16:18
Study of longitudinal beam instabilities at transition crossing in the CERN Proton Synchrotron / Salinas, Julia Eva (Centrale Supelec (FR)) ; Lasheen, Alexandre (CERN)
The Proton Synchrotron (PS) faces beam stability challenges when crossing transi- tion energy, where longitudinal microwave instabilities can lead to rapid emittance blow-up and beam loss. [...]
CERN-ACC-NOTE-2026-0001. - 2026

Úplný záznam
2026-01-22
07:00
Energy sensitivity of the High Luminosity LHC optics at the end of the Beta* squeeze / Horney, Sasha (U. Rome La Sapienza (main) ; CERN) ; Maclean, Ewen (U. Rome La Sapienza (main) ; CERN) ; Dilly, Joschua (U. Rome La Sapienza (main) ; CERN) ; Burrows, Philip (U. Oxford (main)) ; Tomas, Rogelio (U. Rome La Sapienza (main) ; CERN) ; Persson, Tobias (U. Rome La Sapienza (main) ; CERN)
During 2022 and 2023 LHC optics commissioning, it was observed that at low-beta* small changes in the beam-energy could generate substantial perturbations of the linear beam optics, requiring re-commissioning of local corrections in the experimental insertions. This issue may become even more significant at the very low beta* anticipated for operation in the High Luminosity LHC (HL-LHC). [...]
2025 - 4 p. - Published in : JACoW IPAC 2025 (2025) 318 Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.318

Úplný záznam
2026-01-22
07:00
Laser Compton backscattering for precision beam intensity control in the FCC-ee electron-positron collider / Drebot, Illya (INFN, Milan) ; Zimmermann, Frank (U. Rome La Sapienza (main) ; CERN) ; Broggi, Giacomo (U. Rome La Sapienza (main) ; CERN) ; Gessner, Spencer (SLAC) ; Redaelli, Stefano (U. Rome La Sapienza (main) ; CERN)
In this study, we explore the application of laser-driven Compton backscattering (CBS) as a method to precisely adjust and regulate the intensity of colliding particle bunches in the Future Circular Collider (FCC-ee). Maintaining a tightly controlled charge balance between collision partner bunches within a 3–5% tolerance is critical for mitigating the impact of beamstrahlung on bunch length and preventing flip-flop instabilities. [...]
2025 - 4 p. - Published in : JACoW IPAC 2025 (2025) 429 Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.429

Úplný záznam
2026-01-22
07:00
Operational challenges of the SuperKEKB iBump feedback system / Salvesen, John (CERN) ; Ueki, Ryuichi (KEK, Tsukuba ; Sokendai, Tsukuba) ; Funakoshi, Yoshihiro (KEK, Tsukuba ; Sokendai, Tsukuba) ; Masuzawa, Mika (KEK, Tsukuba ; Sokendai, Tsukuba) ; Zimmermann, Frank (CERN) ; Burrows, Philip (U. Oxford (main))
To maintain optimal beam collision conditions and luminosity performance, SuperKEKB requires a fast orbit feedback dedicated to correcting offsets at the interaction point (IP). The 'iBump' feedback system calculates IP beam offset from Beam Position Monitor (BPM) measurements before and after collision and corrects by creating closed orbit bumps in the High Energy Ring (HER). [...]
2025 - 4 p. - Published in : JACoW IPAC 2025 (2025) 2968 Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.2968

Úplný záznam
2026-01-22
07:00
Correction of Long-Range Beam-Beam Driven Normal Sextupolar Resonance Driving Terms / Horney, Sasha (CERN ; U. Oxford (main)) ; Maclean, Ewen (CERN) ; Dilly, Joschua (CERN) ; Deniau, Laurent (CERN) ; Burrows, Philip (U. Oxford (main)) ; Tomas, Rogelio (CERN) ; Persson, Tobias (CERN)
Beam-based studies at the LHC injection energy showed that compensation of the strongly driven sextupolar resonance, Qx+2Qy, improved both the dynamic aperture and lifetime of the beam, even when far from the working point and on the far side of the 3Qy resonance. Thus, a reduction of other strong normal sextupolar resonance sources was of interest. [...]
2025 - 4 p. - Published in : JACoW IPAC 2025 (2025) MOPM019 Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM019

Úplný záznam
2026-01-22
07:00
Design of the front-end complex for a muon cooling demonstrator at CERN / Jurj, Paul (Imperial Coll., London) ; Rogers, Chris (Daresbury) ; Pasternak, Jaroslaw (Imperial Coll., London) ; Losito, Roberto (CERN) ; Kamath, Rohan (Imperial Coll., London)
The muon collider has great potential for enabling high-luminosity multi-TeV lepton-antilepton collisions provided low-emittance, high-intensity muon beams can be produced. Ionization cooling is the proposed technique to achieve the required muon beam emittance. [...]
2025 - 4 p. - Published in : JACoW IPAC 2025 (2025) MOPS023 Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPS023

Úplný záznam
2026-01-22
07:00
Benchmarking the LHC impedance model through loss of Landau damping measurements and simulations / Zampetakis, Michail (U. Rome La Sapienza (main) ; CERN) ; Karlsen-Bæck, Birk Emil (U. Rome La Sapienza (main) ; CERN) ; Timko, Helga (U. Rome La Sapienza (main) ; CERN) ; Karpov, Ivan (U. Rome La Sapienza (main) ; CERN) ; Calaga, Rama (U. Rome La Sapienza (main) ; CERN)
Refining the present longitudinal impedance model is essential for an accurate prediction of beam stability thresholds. Longitudinal loss of Landau damping (LLD) for single bunches were observed in the Large Hadron Collider (LHC). [...]
2025 - 4 p. - Published in : JACoW IPAC 2025 (2025) 552 Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.552

Úplný záznam
2026-01-22
07:00
Magnetohydrodynamic effects in liquid lead target concept for Muon Colliders / Candido, Silvio (CERN) ; Lechner, Anton (CERN) ; Carrelli, Carlo (ENEA, Rome) ; Calzolari, Daniele (CERN) ; Lerner, Giuseppe (CERN) ; Manczak, Jerzy (CERN) ; Tricarico, Luca (Bologna U.) ; Calviani, Marco (CERN) ; Tarantino, Mariano (ENEA, Rome) ; Cioli Puviani, Pietro (ENEA, Rome) et al.
The use of liquid lead as a target material in particle accelerators is of significant interest due to its high density, high thermal power absorption capacity, and resistance to radiation damage. This makes it particularly well-suited for the high-intensity proton beams being studied for CERN’s Muon Collider proposal, with powers ranging up to 4 MW. [...]
2025 - 4 p. - Published in : JACoW IPAC 2025 (2025) THPB017 Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.THPB017

Úplný záznam
2026-01-22
07:00
Advanced beam tuning and beam measurements techniques in the CLEAR facility / Petersson, A (CERN ; Lund U. (main)) ; Aksoy, A (CERN) ; Bonnard, L (CERN) ; Corsini, R (CERN) ; Farabolini, W (CERN) ; Franek, O (CERN ; Prague, Tech. U.) ; Gamba, D (CERN) ; Granados, E (CERN) ; Gilardi, A (CERN) ; Korysko, P (CERN ; Oxford U.) et al.
The CLEAR (CERN Linear Electron Accelerator for Research) facility delivers to a wide user community a 200 MeV electron beam with highly flexible parameters. Running conditions range from single-bunch to multi-bunch operation, with bunch charges from 10 pC to 1 nC, bunch durations from 100 fs to tens of ps, and includes tunable momentum (30 MeV/c to 220 MeV/c). [...]
2025 - 4 p. - Published in : JACoW IPAC 2025 (2025) TUPM026 Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.TUPM026

Úplný záznam
2026-01-22
07:00
FCC-ee Interaction point optics correction with alignment errors using local tuning knobs / Jagabathuni, Satya Sai (U. Geneva (main) ; ESRF, Grenoble) ; Carlier, Felix (CERN) ; Liuzzo, Simone (ESRF, Grenoble)
Optics tuning and correction in the Interaction Point (IP) region of the FCC-ee is critical for achieving the target luminosity. By utilizing dedicated IP tuning knobs, lattice errors at multiple IP's are corrected to restore the design optics, enabling dynamic aperture studies on the fully corrected lattice. [...]
2025 - 4 p. - Published in : JACoW IPAC 2025 (2025) MOPM038 Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.MOPM038

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