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2025-08-16
07:02
Ion-motion simulations of a plasma-wakefield experiment at FLASHForward / Kalvik, D (U. Oslo (main)) ; Drobniak, P (U. Oslo (main)) ; Peña, F (U. Oslo (main) ; LMU Munich (main)) ; Lindstrøm, C A (U. Oslo (main)) ; Beinortaite, J (DESY) ; Boulton, L (DESY) ; Caminal, P (DESY) ; Garland, J (DESY) ; Loisch, G (DESY) ; Svensson, J Björklund (DESY) et al.
In plasma-based acceleration, an ultra-relativistic particle bunch$\unicode{x2014}$or an intense laser beam$\unicode{x2014}$is used to expel electrons from its propagation path, forming a wake that is devoid of electrons. The ions, being significantly more massive, are often assumed to be stationary. [...]
arXiv:2505.24299.- 2025 - 4 p. - Published in : JACoW IPAC 25 (2025) 1462-1465 Fulltext: PDF;
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.1462-1465

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2025-08-15
06:26
Crystal Collimation Cleaning Measurements with 6.5 TeV protons in the LHC / Rossi, Roberto (CERN ; Imperial Coll., London) ; Cavoto, Gianluca (INFN, Rome ; Rome U.) ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN) ; Scandale, Walter (CERN ; Imperial Coll., London)
Safe disposal of beam halo is a fundamental requirement of modern superconductive hadron colliders to reduce thermal load on magnets and background to experimental detectors. [...]
arXiv:2507.13315. - 2025 - 10.
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2025-08-15
06:26
Reduced Order Hysteretic Flux Model for Transport Current Homogenization in Composite Superconductors / Glock, Alexander (CERN ; Darmstadt, Tech. U.) ; Dular, Julien (CERN) ; Verweij, Arjan (CERN) ; Wozniak, Mariusz (CERN)
In this paper, we present the Reduced Order Hysteretic Flux (ROHF) model to describe the relationship between time-varying transport current and internal magnetic flux for composite superconductors. [...]
arXiv:2507.15402. - 2025 - 6.
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2025-08-14
06:21
Proton Beam Dynamics for Concurrent Operation of the LHeC and HL-LHC / André, K D J (CERN) ; Holzer, B J (CERN) ; Forthomme, L (AGH-UST, Cracow) ; Witzleben, T v (CERN ; RWTH Aachen U.) /LHeC study Group Collaboration
The Large Hadron electron Collider (LHeC) project is studying a new LHC interaction region fordeep inelastic scattering collisions between electrons and hadrons in the TeV energy scale. Anintense 50 GeV lepton beam is brought into collision with one 7 TeV hadron beam from CERN’sLarge Hadron Collider in parallel to the hadron-hadron operation. [...]
2025 - 4 p. - Published in : PoS ICHEP2024 (2025) 850 Fulltext: PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024, pp.850

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2025-08-14
06:21
Smallest vertical beam sizes achieved in high-energy accelerators / Tomas Garcia, Rogelio (CERN) ; Ohnishi, Yukiyoshi (KEK, Tsukuba) ; Zimmermann, Frank (CERN)
FCC-ee aims at colliding electrons and positrons with vertical rms beam sizes between 30 and 50 nm with beam energies extending from about 40 GeV to 182.5 GeV. [...]
arXiv:2506.12361. - 2025 - 4.
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2025-08-13
16:28
Margin on the FMCM Threshold for the MBS in TT66 / Lannoy, Christophe ; Wollmann, Daniel (CERN)
On 1st April 2025, voltage ripples at the output of the MBS dipoles’ power converter in TT66 inhibited beam extraction to HiRadMat. [...]
CERN-ACC-NOTE-2025-0016. - 2025 - 14.
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2025-08-12
22:02
A Long-Baseline Atom Interferometer at CERN LHC Point 4: Implementation Study / Arduini, G. ; Buchmüller, O. (Oxford U.) ; Bud, T.A. ; Calatroni, S. ; Crespo-Lopez, O. ; Devienne, A. ; Ellis, J. (King's Coll. London) ; Hakulinen, T. ; Infantino, A. ; Lafarge, D. et al.
Building on the previous feasibility study, this report supported by the Physics Beyond Colliders (PBC) Study Group describes the technical implementation of modifications to the PX46 shaft at LHC Point 4 during LS3 (June 2026 – June 2030) that would enable it to accommodate the installation and operation of a vertical long-baseline Atom Interferometer during Run 4 without affecting LHC operations. We specify in detail the necessary civil‐engineering work, installation of bespoke radiation shielding, deployment of access‐control systems and safety alarms, and design of a mobile elevator platform [...]
CERN-PBC Report-2025-004; arXiv:2508.09694.- Geneva : CERN, 2025 - 10 p. Fulltext: CERN-PBC Report-2025-004 - PDF; 2508.09694 - PDF;

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2025-08-12
08:56
$μ$LHC: Antimuon Ring and HL-LHC based $μ^+p$ Collider / Akturk, D (TOBB ETU, Ankara) ; Canbay, A C (Ankara U.) ; Dagistanli, H (Unlisted, TR) ; Dagli, B (TOBB ETU, Ankara) ; Kaya, U (Ankara U.) ; Ketenoglu, B (Ankara U.) ; Kilic, A (Uludag U.) ; Kocak, F (Uludag U.) ; Ozturk, A (Unlisted, TR) ; Sultansoy, S (TOBB ETU, Ankara) et al.
Conceptual design and performance evaluation of HL-LHC based antimuon-proton collider ($μ$LHC) are presented. [...]
arXiv:2506.15445. - 2025 - 22.
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2025-08-12
08:56
Differentiable simulations for particle tracking in accelerators: analysis, benchmarking and optimization / Huhn, Francisco (CERN) ; Velotti, Francesco M (CERN)
Optimization of beamlines and lattices is a common problem in accelerator physics, which is usually solved with semi-analytical methods and numerical optimization routines. [...]
arXiv:2507.08476. - 2025 - 10.
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2025-08-12
08:56
Geoff: The Generic Optimization Framework & Frontend for Particle Accelerator Controls / Madysa, Penelope (Darmstadt, GSI) ; Appel, Sabrina (Darmstadt, GSI) ; Kain, Verena (CERN) ; Schenk, Michael (CERN)
Geoff is a collection of Python packages that form a framework for automation of particle accelerator controls. [...]
arXiv:2506.03796. - 2025 - 18.
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