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Design, development, and construction of the new beam stoppers for CERN's injector complex
/ Baillard, D. (CERN) ; Grenier-Boley, E. (CERN) ; Dole, M. (CERN) ; Deslande, F. (CERN) ; Froeschl, R. (CERN) ; Lorenzon, T. (CERN) ; Moyret, P. (CERN) ; Peron, R. (CERN) ; Pilan Zanoni, A. (CERN) ; Sharp, C. (CERN) et al.
Beam stoppers are installed in the transfer lines of the CERN accelerator complex; these components are used as part of the access safety system, which guarantees the safety of workers in the accelerators. [...]
arXiv:2408.01074.
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10 p.
Fulltext
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First considerations on the supporting structures of FCC-ee booster and collider in the arc regions
/ Carra, F (CERN) ; Baudin, L (CERN) ; Bauche, J (CERN) ; Artoos, K (CERN) ; Atieh, S (CERN) ; Bertarelli, A (CERN) ; Brunner, O (CERN) ; Capatina, O (CERN) ; Chance, A (Saclay) ; Chemli, S (CERN) et al.
In 2022, the FCC Feasibility Study management mandated aworking group to analyse the best configuration of the FCC-ee tunnelin the arc regions, in view of the construction of a mock-up of thearc half-cell. One of the main and most challenging goals of thestudy, named FCC-ee Arc Half-Cell Mock-up Project, was toperform a preliminary investigation on the principles of supportingthe Short-Straight Sections and dipoles of the half-cells, both forthe booster and for the collider machines. [...]
2024 - 7 p.
- Published in : JINST 19 (2024) T02008
Fulltext: PDF;
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FCC-ee arc half-cell: preliminary design & integration studies, with ideas for a mock-up
/ Carra, F (CERN) ; Baudin, L (CERN) ; Bauche, J (CERN) ; Artoos, K (CERN) ; Atieh, S (CERN) ; Bertarelli, A (CERN) ; Brunner, O (CERN) ; Capatina, O (CERN) ; Chance, A (Saclay) ; Chemli, S (CERN) et al.
During 2022, a dedicated study was undertaken at CERN, together with FCC Feasibility Study collaborators, aimed at proposing a robust configuration for the FCC-ee arc half cell. The proposed configuration takes into account integration aspects of the elements in the arc cross section, both for the booster and the collider, as well as aspects related to powering, cooling and ventilation, supporting and alignment, optics, instrumentation, handling and installation. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPL061
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL061
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Progress and R/D challenges for FCC-ee SRF
/ Venturini Delsolaro, W (CERN) ; Garlasche, M (CERN) ; Peauger, F (CERN) ; Rosaz, G (CERN) ; Karpov, I (CERN) ; Zhang, L (Beijing, Inst. High Energy Phys.) ; Valente Feliciano, A M (Jefferson Lab) ; Udongwo, S A (Rostock U.) ; Bianchi, A (CERN) ; Bellini, G (CERN) et al.
The FCC-ee machines present a huge challenge for the RF systems, which need to be adapted to very diverse beam conditions going from moderate energy and high current for the Z machine to high energy and low beam current for the ttbar. This inverse scaling results naturally from a fixed budget for the synchrotron radiation, which the SRF cavities need to compensate. [...]
2023 - 13 p.
- Published in : EPJ Tech. Instrum. 10 (2023) 6
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SWELL and Other SRF Split Cavity Development
/ Peauger, F (CERN) ; Brunner, O (CERN) ; Garlasche, M (CERN) ; Zadeh, S Gorgi (CERN) ; Koettig, T (CERN) ; Rosaz, G (CERN) ; Syratchev, I (CERN) ; Timmins, M (CERN) ; Therasse, M (CERN) ; Venturini Delsolaro, W (CERN) et al.
An innovative superconducting cavity topology has been recently proposed at CERN. It integrates longitudinal waveguide slots crossing perpendicularly the RF surface to damp transverse higher order modes. [...]
2022 - 5 p.
- Published in : JACoW LINAC 2022 (2022) 300-304
Fulltext: PDF;
In : 31st Linear Accelerator Conference (LINAC22), Liverpool, UK, 28 Aug - 2 Sep 2022, pp.300-304
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Towards the Last Stages of the CERN’s AD-Target Area Consolidation Project and Recommissioning Plans to Resume Operation
/ Torregrosa, Claudio (CERN) ; Ahdida, Claudia (CERN) ; Bouvard, Aymeric (CERN) ; Broche, Alexandre (CERN) ; Burger, Stephane (CERN) ; Butcher, Mark (CERN) ; Calviani, Marco (CERN) ; Clerc, Vincent (CERN) ; De Macedo, Aurelio (CERN) ; De Man, Sven (CERN) et al.
Antiprotons are produced at CERN at the Antiproton Decelerator (AD) Target Area by impacting 26 GeV/c proton beams onto a fixed target. Further collection, momentum selection, and transport of the secondary particles - including antiprotons - towards the AD ring is realised by a 400 kA pulsed magnetic horn and a set of magnetic dipoles and quadrupoles. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 3563-3566
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3563-3566
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Third-Generation CERN n_TOF Spallation Target: Final Design and Examinations of Irradiated Prototype
/ Esposito, Raffaele (CERN ; Ecole Polytechnique, Lausanne) ; Aberle, Oliver (CERN) ; Calviani, Marco (CERN) ; Coiffet, Thibaut (CERN) ; Crouvizier, Mickaël (CERN) ; Franqueira Ximenes, Rui (CERN) ; Maire, Vincent (CERN) ; Pérez Fontenla, Ana Teresa (CERN) ; Timmins, Marc (CERN)
The new neutron spallation target for the CERN neutron Time-Of-Flight (n_TOF) facility is based on a nitrogen-cooled Pb core impacted by short high-intensity proton beam pulses. An extensive material characterization campaign has been carried out to define the constitutive behavior of lead and assess its response under pulsed proton beam irradiation. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 3555-3558
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3555-3558
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Design and behaviour of the Large Hadron Collider external beam dumps capable of receiving 539 MJ/dump
/ Maestre, J. (CERN ; Granada U.) ; Torregrosa, C. (CERN ; Granada U.) ; Kershaw, K. (CERN) ; Bracco, C. (CERN) ; Coiffet, T. (CERN) ; Ferrari, M. (CERN) ; Ximenes, R. Franqueira (CERN) ; Gilardoni, S. (CERN) ; Grenier, D. (CERN) ; Lechner, A. (CERN) et al.
Two 6-t beam dumps, made of a graphite core encapsulated in a stainless steel vessel, are used to absorb the energy of the two Large Hadron Collider (LHC) intense proton beams during operation of the accelerator. Operational issues started to appear in 2015 during LHC Run 2 (2014-2018) as a consequence of the progressive increase of the LHC beam kinetic energy, necessitating technical interventions in the highly radioactive areas around the dumps. [...]
arXiv:2110.08783.-
2021-11-16 - 36 p.
- Published in : JINST 16 (2021) P11019
Fulltext: 2110.08783 - PDF; document - PDF; Fulltext from publisher: PDF;
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High-gradient testing of an $S$-band, normal-conducting low phase velocity accelerating structure
/ Vnuchenko, A (Valencia U., IFIC) ; Esperante Pereira, D (Valencia U., IFIC) ; Gimeno Martinez, B (Valencia U., IFIC) ; Benedetti, S (CERN) ; Catalan Lasheras, N (CERN) ; Garlasch, M (CERN) ; Grudiev, A (CERN) ; McMonagle, G (CERN) ; Pitman, S (CERN) ; Syratchev, I (CERN) et al.
A novel high-gradient accelerating structure with low phase velocity, v/c=0.38, has been designed, manufactured and high-power tested. The structure was designed and built using the methodology and technology developed for CLIC 100 MV/m high-gradient accelerating structures, which have speed of light phase velocity, but adapts them to a structure for nonrelativistic particles. [...]
2020 - 13 p.
- Published in : Phys. Rev. Accel. Beams 23 (2020) 084801
Fulltext from Publisher: PDF;
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