CERN Accelerating science

All CERN Accelerators documents

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2023-12-04
12:43
Synthesis of antihydrogen from in‐flight charge exchange of decelerated antiprotons in positronium for the GBAR experiment / Roumegou, Corentin
The GBAR experiment aims at measuring the gravitational acceleration of antimatter via the free fall of an antihydrogen atom [...]
CERN-THESIS-2023-274 2023UPASP093. - 196 p.


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2023-12-04
11:47
Conceptual design study for a dedicated low-energy diagnostics line at Linac3 / Bellodi, Giulia (CERN) ; Bodart, Dominique (CERN) ; Cravero, Jean-Marc (CERN) ; Etxebarria Erdoiza, Jone (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES)) ; Kuchler, Detlef (CERN) ; Mahner, Edgar (CERN) ; Roncarolo, Federico (CERN) ; Scrivens, Richard (CERN) ; Valerio Lizarraga, Cristhian Alfonso (Universidad Autonoma de Sinaloa (MX))
A low-energy diagnostics upgrade of Linac3 has been studied in the last couple of years to allow a more precise characterization of the beam properties at extraction from the source, currently impeded by a complete lack of measuring devices in the first ~6 m of the accelerator layout. [...]
CERN-ACC-NOTE-2023-0023.
- 2023.

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2023-12-01
07:04
Comparison of Two Detector Magnetic Systems for the Future Circular Hadron-Hadron Collider / Klyukhin, Vyacheslav (SINP, Moscow ; CERN) ; Ball, Austin (CERN) ; Berriaud, Christophe Paul (IRFU, Saclay) ; Curé, Benoit (CERN) ; Dudarev, Alexey (CERN) ; Gaddi, Andrea (CERN) ; Gerwig, Hubert (CERN) ; Hervé, Alain (Wisconsin U., Madison) ; Mentink, Matthias (CERN) ; Riegler, Werner (CERN) et al.
This work describes a detailed study of two possible options for the magnetic system of a Future Circular hadron-hadron Collider detector.The conceptual design study of a Future Circular hadron-hadron Collider (FCC-hh) to be constructed at CERN with a center-of-mass energy of the order of 100 TeV requires superconducting magnetic systems with a central magnetic flux density of an order of 4 T for the experimental detectors. The developed concept of the FCC-hh detector involves the use of an iron-free magnetic system consisting of three superconducting solenoids. [...]
2023 - 11 p. - Published in : Appl. Sciences 13 (2023) 10387 Fulltext: PDF;

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2023-12-01
07:04
A New Wall Current Transformer for Accurate Beam Intensity Measurements in the Large Hadron Collider / Krupa, Michal (CERN) ; Gasior, Marek (CERN)
The Large Hadron Collider (LHC) stores two high-energy counter-rotating particle beams consisting of multiple bunches of a nanosecond length. Precise knowledge of the number of particles within each bunch, known as the bunch intensity, is crucial for physicists and accelerator operators. [...]
2023 - 21 p. - Published in : MDPI Energies 16 (2023) 7442 Fulltext: PDF;

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2023-12-01
07:04
2023 Compendium of Radiation-Induced Effects for Candidate Particle Accelerator / Ferraro, Rudy (CERN) ; Gkountoumis, Panagiotis (CERN) ; Foucard, Gilles (CERN) ; Ventura, Antonio (CERN) ; Scialdone, Antonio (CERN ; Montpellier U.) ; Zimmaro, Alessandro (CERN ; Montpellier U.) ; Glecer, Bruno (CERN) ; Koseoglou, Sokratis (CERN) ; Botias, Cai Arcos (CERN) ; Masi, Alessandro (CERN) et al.
The sensitivity of a variety of components for particle accelerator electronics has been analyzed against Single Event Effects, Total Ionizing Dose and Displacement Damage. [...]
2023. - 8 p.

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2023-11-30
07:04
Beam merging assisted by a bent crystal / Scandale, W (Imperial Coll., London ; INFN, Rome) ; Cerutti, F (CERN) ; Esposito, L S (CERN) ; Gilardoni, S (CERN) ; Losito, R (CERN) ; Smirnov, G I (CERN) ; Giribono, A (Frascati) ; Bauce, M (INFN, Rome) ; Collamati, F (INFN, Rome) ; Valente, P (INFN, Rome) et al.
Bunch merging is a well-established technique to increase the intensity of synchrotrons and the luminosity of circular colliders. We suggest to exploit a combination of channeling, volume reflection and amorphous interactions in a bent crystal for beam merging in a transfer line. [...]
2023 - 6 p. - Published in : Eur. Phys. J. Plus 138 (2023) 981 Fulltext: PDF;

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2023-11-30
07:03
How to overcome the demagnetization of superconducting Halbach arrays? / Houbart, M (Liege U.) ; Fagnard, J-F (Liege U.) ; Dular, J (CERN) ; Dennis, A R (Cambridge U.) ; Namburi, D K (Glasgow U.) ; Durrell, J H (Cambridge U.) ; Geuzaine, C (Liege U.) ; Vanderheyden, B (Liege U.) ; Vanderbemden, P (Liege U.)
Assembling trapped-field superconducting magnets with mutually orthogonal magnetizations directions in a Halbach array configuration offers the prospect of generating both high fields and large field gradients. A major issue when assembling bulk superconductors in a Halbach array, however, consists in the alteration of the initial current density distribution during the assembly process. [...]
2023 - 12 p. - Published in : Supercond. Sci. Technol. 36 (2023) 115012

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2023-11-30
07:03
Uniform onset of the long proton bunch self-modulation seeded by an electron bunch in an overdense plasma / Moon, K (UNIST, Ulsan) ; Yoon, E S (UNIST, Ulsan) ; Chung, M (UNIST, Ulsan) ; Muggli, P (CERN) ; Moreira, M (Lisbon, IST) ; Baistrukov, M A (Novosibirsk State U.)
The phase, growth rate, and onset of long proton bunch self-modulation in plasma can be controlled by a preceding short charged particle bunch. In this paper, by analyzing the growth rates of the self-modulation obtained from particle-in-cell simulation results, we identify two modes of self-modulation, namely noise-seeded and externally seeded self-modulations, and investigate their onset timings. [...]
2023 - 9 p. - Published in : Phys. Rev. Accel. Beams 26 (2023) 111301 Fulltext: PDF;

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2023-11-30
07:03
A Saturable Pulse Transformer Based on Nanocrystalline Magnetic Cores for an Adjustable Nanosecond High-Voltage Generator / Degnon, Mawuena R ; Gusev, Anton I ; de Ferron, Antoine Silvestre ; Pecastaing, Laurent ; Baranov, Aleksandr ; Mielot, Christophe ; Boisne, Sébastien ; Barnes, Michael J (CERN) ; Senaj, Viliam (CERN) ; Kramer, Thomas (CERN) et al.
This article is devoted to saturable pulse transformers (SPTs), combining the functions of a pulse transformer and a magnetic switch. Two nanocrystalline magnetic cores are investigated in the SPT of an inductive energy storage (IES) pulsed power system based on a semiconductor opening switch (SOS). [...]
2023 - 9 p. - Published in : IEEE Trans. Plasma Sci. 51 (2023) 2849-2857

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2023-11-29
18:15
Design and optimisation of a variable momentum secondary beamline for the NP06/ENUBET project / Parozzi, Elisabetta Giulia
The precision of the measurement of the cross-section of the electronic and muon neutrino is mainly limited by the knowledge of the initial flux [...]
CERN-THESIS-2023-265 - 129 p.


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