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Accelerator Physics

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2026-06-04
04:46
Updates on Impedance Studies for the FCC-ee High Energy Booster / Kim, Keon Hee (GANIL) ; Ghribi, Adnan (GANIL) ; Martinez, Santiago (GANIL) ; Bruant, Quentin (Saclay) ; Chance, Antoine (Saclay) ; Dalena, Barbara (Saclay) ; Antuono, Chiara (CERN) ; Gibellieri, Dora (CERN) ; Zannini, Carlo (CERN) ; Zimmermann, Frank (CERN) et al.
Following the Future Circular Collider (FCC) Feasibility Study completion, the impedance model for the FCC-ee High-Energy Booster (HEB) has been significantly expanded beyond the initial copper vacuum pipe resistive wall analysis. [...]
arXiv:2605.29799. - 2026-06 - 4.
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2026-04-24
11:25
Correctability of Measured Quadrupole Errors in the New Separation Dipoles on the HL-LHC Optics with a Local Skew Quadrupole Corrector / Dilly, Joschua Werner ; Maclean, Ewen Hamish (CERN) ; Tomas Garcia, Rogelio (CERN)
In this study the correctability of the skew quadrupole field errors, as measured in one of the fabricated separation dipoles for the low-beta* insertion regions of the HL-LHC, by means of a locally installed skew quadrupole magnet is evaluated. [...]
CERN-ACC-NOTE-2026-0005. - 2026
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2026-04-21
06:41
Transition-Edge Sensor Spectrometer for Precision Spectroscopy of Antiprotonic Atoms / Morgan, Kelsey (NIST, Boulder) ; Azuma, Toshiyuki (KEK, Tsukuba) ; Baptista, Gonçalo (Paris, Lab. Kastler Brossel) ; Becker, Daniel (Colorado U.) ; Bennett, Douglas (NIST, Boulder) ; Butin, François (CERN) ; Dean, Jonathan W (NIST, Boulder ; Colorado U.) ; Eizenberg, Ofir (Technion) ; Fowler, Joseph W (NIST, Boulder) ; Fujioka, Hiroyuki (ISCT, Tokyo) et al.
antiProtonic Atom X-ray (PAX) spectroscopy is an experiment that aims to test strong-field quantum electrodynamics (QED) effects by performing high-precision X-ray spectroscopy of antiprotonic atoms. PAX will use a low-energy antiproton beam provided by the Extra Low ENergy Antiproton (ELENA) ring at the European Organization for Nuclear Research (CERN) to create antiprotonic atoms. [...]
2026 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 36 (2026) 2101706

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2026-04-16
16:09
Adiabatic Focusing of a Long Proton Bunch in Plasma / Verra, L (CERN) ; Gschwendtner, E (CERN) ; Muggli, P (Munich, Max Planck Inst.)
We show in experiments that a long, relativistic proton bunch is focused by the plasma adiabatic response. [...]
arXiv:2208.12342. - 4.
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2026-04-15
11:31
III.6 — Beam coupling impedance measurements with beam and on a bench / Biancacci, Nicolò (CERN)
The beam coupling impedance is one of the key quantities describing the interaction between aparticle beam travelling in a particle accelerator and its surroundings. Under specific circumstances,the impedance can lead to severe beam instabilities which limit the overall performance of a runningaccelerator or pose challenges for the achievement of a project.In this contribution, we present the main techniques in use to characterize the impedance either withbeam-based procedures, or with RF measurements on a test bench. [...]
2024 - 28 p. - Published in : CERN Yellow Rep. School Proc. 3 (2024) 2029-2056 External link: Fulltext
In : Proceedings of the Joint Universities Accelerator School (JUAS) : Courses and exercises, Geneva, Switzerland, 27 Nov 2024, pp.2029-2056 (CERN-2024-003)

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2026-04-15
06:59
Terahertz and Optical Acceleration Techniques / Kärtner, Franz X (DESY ; CFEL, Hamburg)
The use of terahertz (THz) and optical radiation for electron acceleration and manipulation of electron bunches has progressed over the last decade to a level where practical devices for THz guns, THz and optical acceleration modules and a wide range of beam manipulations have become possible. [...]
arXiv:2604.05691. - 2026 - 13.
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2026-04-01
06:18
Development of radiation-tolerant beam imaging via multimode fiber and synthetic data-driven machine learning / Xu, Q (Cockcroft Inst. Accel. Sci. Tech. ; CERN ; U. Liverpool (main)) ; Zhang, H D (Cockcroft Inst. Accel. Sci. Tech. ; U. Liverpool (main)) ; Trad, G (CERN) ; Hill, A (Cockcroft Inst. Accel. Sci. Tech. ; U. Liverpool (main)) ; Roncarolo, F (CERN) ; Welsch, C P (Cockcroft Inst. Accel. Sci. Tech. ; U. Liverpool (main))
Transverse beam profile monitoring in high-radiation areas is challenging due to camera degradation. A proposed solution employs a multimode fiber (MMF) to relay optical signals from the radiation zone to a shielded area, where a standard CMOS camera can operate safely. [...]
2026 - 12 p. - Published in : Phys. Rev. Accel. Beams 29 (2026) 032801 Fulltext: PDF;

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2026-03-26
06:11
Study of the Run-3 muon flux at the SND@LHC experiment / SND@LHC Collaboration
Long-range muons produced in proton-proton collisions at the ATLAS interaction point constitute the primary background for neutrino interaction searches at the SND@LHC experiment. [...]
arXiv:2603.21878. - 11.
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2026-03-11
06:20
Improved thermal monitoring in particle accelerators using FBGs: first insights from the iPipe Project in LHC Run 3 / Fienga, Francesco (U. Naples (main) ; CERN) ; Marrazzo, Vincenzo Romano (U. Naples (main) ; CERN) ; Sito, Leonardo (U. Naples (main) ; CERN) ; Beni, Noemi (Debrecen, Inst. Nucl. Res. ; CERN) ; Szillasi, Zoltan (Debrecen, Inst. Nucl. Res. ; CERN) ; Irace, Andrea (U. Naples (main)) ; Zeuner, Wolfram (CERN) ; Salvant, Benoit (CERN) ; Buontempo, Salvatore (Salento U. ; INFN, Naples ; CERN) ; Breglio, Giovanni (U. Naples (main) ; CERN)
Particle accelerators, such as the Large Hadron Collider (LHC) at CERN, are planning to increase the intensity of circulating particle beams. However, this upgrade faces challenges due to beam-induced heating that can lead to operational issues and component damage. [...]
2023 - Published in : 10.1364/OFS.2023.Th6.42
In : 28th International Conference on Optical Fiber Sensors (OFS 2023), Naka-ku, Japan, 20 - 24 Nov 2023

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2026-02-27
04:10
X-ray reflection: a FLUKA model and its application in the design of synchrotron light beamlines and CERN's Future Circular Collider / Mazzola, Giuseppe (CERN) ; Chitra, Sunil (Argonne) ; Devienne, Arnaud (CERN) ; Frasca, Alessandro (CERN ; Liverpool U.) ; Fusté, María José García (CELLS - ALBA, LLS) ; Heinis, Dominique (CELLS - ALBA, LLS) ; Lechner, Anton (CERN) ; Lerner, Giuseppe (CERN) ; Rebuffi, Luca (Argonne) ; del Rio, Manuel Sanchez (ESRF, Grenoble) et al.
Relying on atomic scattering factors from evaluated databases, a new model for the reflectivity of x rays on solid surfaces has been developed for FLUKA v4-6.0. [...]
arXiv:2602.09672. - 14.
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