CERN Accelerating science

Accelerator Physics

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AUP First Pre-Series Cryo-Assembly Design Production and Test Overview / Feher, S (Fermilab) ; Ambrosio, G (Fermilab) ; Apollinari, G (Fermilab) ; Baldini, M (Fermilab) ; Bossert, R (Fermilab) ; Carcagno, R (Fermilab) ; Chlachidze, G (Fermilab) ; DiMarco, J (Fermilab) ; Rabehl, R (Fermilab) ; Stoynev, S (Fermilab) et al.
New high field and large-aperture quadrupole magnets for the low-beta inner triplets (Q1, Q2, Q3) have been built and tested as part of the high-luminosity upgrade of the Large Hadron Collider (HL-LHC). These new quadrupole magnets are based on Nb3Sn superconducting technology. [...]
FERMILAB-CONF-23-0891-TD.- 2024 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4005605 Fermilab Library Server: PDF; External link: Fermilab Library Server

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Optics for Landau damping with minimized octupolar resonances in the LHC / Tomás, R (CERN) ; Carlier, F (CERN) ; Chudoba, F (CERN) ; Deniau, L (CERN) ; Dilly, J (CERN) ; Ferrentino, V (CERN ; Naples U.) ; Horney, S (CERN) ; Hostettler, M (CERN) ; Keintzel, J (CERN) ; Kostoglou, S (CERN) et al.
Operation of the Large Hadron Collider (LHC) requires strongoctupolar magnetic fields to suppress coherent beam instabilities.The amplitude detuning that is generated by these octupolar magneticfields brings the tune of individual particles close to harmfulresonances, which are mostly driven by the octupolar fieldsthemselves. In 2023, new optics were deployed in the LHC atinjection with optimized betatronic phase advances to minimize theresonances from the octupolar fields without affecting the amplitudedetuning. [...]
2024 - 14 p. - Published in : JINST 19 (2024) T05010 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.T05010

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Elevating electron energy gain and betatron X-ray emission in proton-driven wakefield acceleration / Saberi, Hossein (Manchester U. ; Daresbury) ; Xia, Guoxing (Manchester U. ; Daresbury) ; Liang, Linbo (Manchester U. ; Daresbury) ; Farmer, John Patrick (CERN ; Munich, Max Planck Inst.) ; Pukhov, Alexander (Heinrich Heine U., Dusseldorf)
The long proton beams present at CERN have the potential to evolve into a train of microbunches through the self-modulation instability process. [...]
- 7 p.

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LHC Upgrades in preparation of Run 3 / Arduini, G (CERN) ; Baglin, V (CERN) ; Bartosik, H (CERN) ; Bottura, L (CERN) ; Bracco, C (CERN) ; Bradu, B (CERN) ; Bregliozzi, G (CERN) ; Brodzinski, K (CERN) ; Bruce, R (CERN) ; Calviani, M (CERN) et al.
The Large Hadron Collider (LHC) Long Shutdown 2(2019–2021), following LHC Run 2, was primarily dedicated to theupgrade of the LHC Injectors but it included also a significantamount of activities aimed at consolidation of the LHC machinecomponents, removal of known limitations and initial upgrades inview of the High-Luminosity LHC (HL-LHC) to favour the intensityramp-up during Run 3 (2022–2025). An overview of the majormodifications to the accelerator and its systems is followed by asummary of the results of the superconducting magnet trainingcampaign to increase the LHC operation energy beyond the maximumvalue of 6.5 TeV reached during Run 2. [...]
2024 - 138 p. - Published in : JINST 19 (2024) P05061 Fulltext: PDF;

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Loss of Landau damping in double harmonic RF systems / Intelisano, Leandro
Landau damping is a natural stabilization mechanism to mitigate coherent beam instabilities. In the absence of synchrotron radiation, it plays a crucial role in hadron accelerators, representing an effective way to maintain the beam stable. [...]
CERN-THESIS-2023-396.- 132 p. Fulltext: PDF; External link: Approve this document (restricted)

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Progress of the FCC-ee optics tuning working group / Bauche, J (CERN) ; da Silva, T (IRFU, Saclay) ; Shatilov, D (CERN) ; Chance, A (IRFU, Saclay) ; Wu, Y (Ecole Polytechnique, Lausanne) ; Wang, Y (Beijing, Inst. High Energy Phys.) ; Tomas, Rogelio (CERN) ; Franchi, Andrea (ESRF, Grenoble) ; Faus-Golfe, Angeles (IJCLab, Orsay) ; Dalena, Barbara (IRFU, Saclay) et al.
FCC-ee is a proposed lepton collider with a circumference close to 100 km to produce an unprecedented amount of luminosity. The FCC-ee optics tuning working group is addressing one of the most critical aspects of the FCC-ee, that is the recovery of the optics design performance in presence of realistic imperfections. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) WEPL023 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPL023

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Periodicity five lattice proposal for a cpedm prototype ring / Cilento, Vera (CERN) ; Carli, Christian (CERN)
The community studying facilities to measure a possible Electric Dipole Moment of a charged particle (cpEDM) in a storage ring agreed that a Prototype Storage-Ring (PSR) is required as intermediate step to address critical questions, gain experience and rule out showstoppers. In what follows, a new lattice proposal of the PSR with a periodicity five is described and spin tracking simulations are shown. [...]
2023 - Published in : JACoW IPAC 2023 (2023) MOPA086 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPA086

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The Embedded Monitoring Processor for High Luminosity LHC / Moschovakos, Paris (CERN) ; Ecker, Dominic (Wuppertal U.) ; Olesen, Jakob (Aarhus U.) ; Ryjov, Vladimir (CERN) ; Schlenker, Stefan (CERN)
The Embedded Monitoring Processor (EMP) is a versatile platform designed for High Luminosity LHC experiments, addressing the communication, processing, and monitoring needs of diverse applications in the ATLAS experiment, with a focus on supporting front-ends based on lpGBT (low power Giga-Bit Transceiver). Built around a commercial SoM, the EMP architecture emphasizes modularity, flexibility and the usage of standard interfaces, aiming to cover a wide range of applications and facilitating detector integrators to design and implement their specific solutions. [...]
2023 - 5 p. - Published in : JACoW ICALEPCS 2023 (2023) 1470-1474 Fulltext: PDF;
In : 19th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2023), Cape Town, South Africa, 7 - 13 Oct 2023, pp.1470-1474

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Enhancing Measurement Quality in HL-LHC Magnets Testing Using Software Techniques on Digital Multimeter Cards-Based System / Reymond, Hubert (CERN) ; Andreassen, Odd (CERN) ; Charrondiere, Maryline (CERN) ; Charrondière, Cedric (CERN) ; Jankowski, Patryk (CERN)
The HL-LHC magnets play a critical role in the High-Luminosity Large Hadron Collider project, which aims to increase the luminosity of the LHC and enable more precise studies of fundamental physics. Ensuring the performance and reliability of these magnets requires high-precision measurements of their electrical properties during testing. [...]
2023 - 6 p. - Published in : JACoW ICALEPCS 2023 (2023) 729-734 Fulltext: PDF;
In : 19th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2023), Cape Town, South Africa, 7 - 13 Oct 2023, pp.729-734

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Design of an Electro-Optic Beam Position Monitor for Unbunched Beams based on Frequency Domain DC Field Measurements / Cristiano, Antonio
Continuous and accurate monitoring of the transverse position of a charged particle beam in an accelerator plays a crucial role in ensuring efficient operation of the accelerator and the success of the conducted physics experiments [...]
CERN-THESIS-2023-386 - 145 p.

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