CERN Accelerating science

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1.
Powering Performance and Endurance Beyond Design Limits of HL-LHC Low-Beta Quadrupole Model Magnets / Mangiarotti, Franco J (CERN) ; Ferradas Troitino, Salvador (CERN) ; Duda, Michal (Cracow, INP) ; Bajko, Marta (CERN) ; Bottura, Luca (CERN) ; Desbiolles, Vincent (CERN) ; Elekes, Gyopar (Babes-Bolyai U.) ; Ferradas Troitino, Jose (METROLAB, Geneva ; CERN) ; Feuvrier, Jerome (CERN) ; Ferracin, Paolo (LBNL, Berkeley) et al.
For the High Luminosity Upgrade project (HL-LHC) of the CERN Large Hadron Collider (LHC), lower β* quadrupole magnets based on advanced Nb 3 Sn conductors will be installed on each side of the ATLAS and CMS interaction points. To quantify the endurance and technological limits of these magnets, beyond their maximum operational conditions, two short length model magnets have been extensively tested at the CERN SM18 test facility. [...]
2021 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4000805
2.
The Development of the Superconducting Dipoles D2 for the High Luminosity Upgrade of LHC / Caiffi, Barbara (INFN, Genoa) ; Bersani, Andrea (INFN, Genoa) ; Cereseto, Roberto R (INFN, Genoa) ; Fabbricatore, Pasquale (INFN, Genoa) ; Farinon, Stefania (INFN, Genoa) ; Fiscarelli, Lucio (CERN) ; Foussat, Arnaud (CERN) ; Levi, Filippo (U. Genoa) ; Mangiarotti, Franco (CERN) ; Pampaloni, Alessandra (INFN, Genoa) et al.
The recombination dipoles D2 (MBRD) for the luminosity upgrade of the Large Hadron Collider (LHC) are double aperture magnets to be placed on each side of ATLAS and CMS experiments, generating 4.5 T along a magnetic length of 7.78 m and a bore diameter of 105 mm. Its development plan foresees the construction of a short model 1.6 m long, followed by a prototype and by the series of 6 magnets. [...]
2021 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 1-5
3.
Characterization of the Mechanical Properties of Nb$_3$Sn Coils / Fernández, José Luis Rudeiros (CERN) ; Perez, Juan Carlos (CERN) ; Ferradas Troitino, Salvador (CERN) ; Guinchard, Michael (CERN) ; Grosclaude, Philippe (CERN) ; Crouvizier, Mickael D (CERN) ; Langeslag, Stefanie (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Savary, Frederic (CERN)
The 11 T magnet and other high-field magnets in the framework of the High-Luminosity Large Hadron Collider project are based on epoxy resin impregnated Nb3Sn coils. This paper presents the development of an experimental measurement setup, and associated methodology for the determination of the mechanical properties in compression of epoxy resin impregnated Nb3Sn coils. [...]
2019 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 8401205
In : Applied Superconductivity Conference 2018, Seattle, United States Of America, 28 Oct - 2 Nov 2018, pp.8401205
4.
Length Changes of Unconfined Nb$_3$Sn Rutherford Cables During Reaction Heat Treatment / Michels, Matthias (CERN) ; Lackner, Friedrich (CERN) ; Scheuerlein, Christian (CERN) ; Carlon Zurita, Alejandro (CERN) ; Ferradas Troitino, Salvador (CERN) ; Bourcey, Nicolas (CERN) ; Savary, Frederic (CERN) ; Tommasini, Davide (CERN)
In order to predict volume changes of Nb3Sn coils during reaction heat treatment (RHT), coefficients of thermal expansion (CTE) of the involved materials need to be known. While the CTEs of bulk materials are widely available, there is a lack of knowledge about the dimensional changes of the Nb3Sn Rutherford cables. [...]
2019 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 6000605
In : Applied Superconductivity Conference 2018, Seattle, United States Of America, 28 Oct - 2 Nov 2018, pp.6000605
5.
Mechanical Tests, Analysis, and Validation of the Support Structure of the eRMC and RMM Magnets of the FCC R&D at CERN / Pérez, Manuel García (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Perez, Juan Carlos (CERN) ; Bourcey, Nicolas (CERN) ; Grosclaude, Philippe (CERN) ; Guinchard, Michael (CERN) ; Tommasini, Davide (CERN) ; Naini, Sohrab Emami (CERN) ; Ferradas Troitiño, Salvador (CERN)
The enhanced racetrack model coil and racetrack model magnet constitute the current R&D; Nb$_3$Sn magnets under development at CERN aiming to achieve dipole fields of 16-18 T, the design baseline of the Future Circular Collider (FCC). This article reports the mechanical behavior of their common support structure, which underwent three different levels of room-temperature preload (with the bladders and key method) and two cooldown cycles to 80 K. [...]
2020 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 30 (2020) 4004507
6.
Mechanical analysis of the collaring process of the 11 T dipole magnet / Ferracin, Paolo (CERN) ; Bottura, Luca (CERN) ; Bourcey, Nicolas (CERN) ; Daly, Michael (CERN) ; Devred, Arnaud (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Ferradas Troitino, Jose (CERN) ; Ferradas Troitino, Salvador (CERN) ; Grosclaude, Philippe (CERN) ; Guinchard, Michael (CERN) et al.
As part of the Large Hadron Collider (LHC) accelerator upgrades foreseen by the high luminosity-LHC project, the CERN 11 T program is aimed at replacing standard LHC Nb-Ti main dipole magnets, operating with a bore field of 8.3 T, with pairs of shorter Nb$_3$Sn dipole magnets with a bore field of 11 T and the same total integrated field, thus providing space for additional collimators in the dispersion suppressor region. At the time of the submission of this paper, six single-aperture and two double-aperture short models have been fabricated and tested. [...]
2019 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4002705
7.
Applied metrology in the production of superconducting model magnets for particle accelerators / Ferradas Troitino, Jose (CERN) ; Bestmann, Patrick (CERN) ; Bourcey, Nicolas (CERN) ; Carlon Zurita, Alejandro (CERN) ; Cavanna, Eugenio (ASG Supercond., Genova) ; Ferracin, Paolo (CERN) ; Ferradas Troitino, Salvador (CERN) ; Holik, Eddie Frank (Fermilab) ; Izquierdo Bermudez, Susana (CERN) ; Lackner, Friedrich (CERN) et al.
The production of superconducting magnets for particle accelerators involves high precision assemblies and tight tolerances, in order to achieve the requirements for their appropriate performance. It is therefore essential to have a strict control and traceability over the geometry of each component of the system, and also to be able to compensate possible inherent deviations coming from the production process..
2018 - 1 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4002106 Fulltext: PDF;
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4002106

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