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1.
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Proof-of-Principle of an Energy-Efficient, Iron-Dominated Electromagnet for Physics Experiments
/ Devred, A (CERN) ; Ballarino, A (CERN) ; Bourcey, N (CERN) ; Mangiarotti, F (CERN) ; Milanese, A (CERN) ; Petrone, C (CERN)
A number of physics experiments call for the use of iron-dominated, normal-conducting electromagnets to produce moderate fields (2 T range) in a large gap or over a large volume. Although robust and reliable, these magnets require significant electrical power, in the MW range, and can thus be costly to operate, especially in DC mode. [...]
2024 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4902007
Fulltext: PDF;
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2.
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Construction and Test of the Enhanced Racetrack Model Coil, First CERN R&D; Magnet for the FCC
/ Perez, J C (CERN) ; Bajko, M (CERN) ; Bourcey, N (CERN) ; Bordini, B (CERN) ; Bottura, L (CERN) ; Troitiño, S Ferradás (CERN) ; Gautheron, E (CERN) ; Guinchard, M (CERN) ; Bermudez, S Izquierdo (CERN) ; Mangearotti, F (CERN) et al.
Racetrack model coils (RMC) have been built at CERN during the past decade, as an R&D; tool to qualify conductors and technologies developed for high field superconducting accelerator magnets (Perez
et al.
, 2016). RMC, assembled in a dipole magnet configuration, proved to be an efficient instrument reducing cost and feed-back time while developing new magnets. [...]
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4005105
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4005105
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3.
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Optimizing the use of pressurized bladders for the assembly of HL-LHC MQXFB magnets
/ Ferradas Troitino, J. (CERN) ; Ambrosio, G. (Fermilab) ; Bourcey, N. (CERN) ; Cheng, D. (LBL, Berkeley) ; Devred, A. (CERN) ; Felice, H. (L2S, Gif sur Yvette) ; Ferracin, P. (LBL, Berkeley) ; Guinchard, M. (CERN) ; Izquierdo Bermudez, S. (CERN) ; Kandemir, K. (CERN) et al.
The use of pressurized bladders for stress control of superconducting magnets was firstly proposed at Lawrence Berkeley National Laboratory (LBNL) in the early 2000s. Since then, the so-called bladders and keys procedure has become one of the reference techniques for the assembly of high-field accelerator magnets and demonstrators. [...]
arXiv:2301.09537; FERMILAB-PUB-22-911-TD.-
2023-04-19 - 17 p.
- Published in : Supercond. Sci. Technol. 36 (2023) 065002
Fulltext: 2301.09537 - PDF; FERMILAB-PUB-22-911-TD - PDF; 3eb6eaa164998b3b75b795795e9c0bc4 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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4.
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Performance of a MQXF Nb$_3$Sn Quadrupole Magnet Under Different Stress Level
/ Izquierdo Bermudez, Susana (CERN) ; Ambrosio, Giorgio (Fermilab) ; Bordini, Bernardo (CERN) ; Bourcey, Nicolas (CERN) ; Devred, Arnaud ; Ferracin, Paolo (LBNL, Berkeley) ; Ferradas Troitino, Jose (CERN) ; Ferradas Troitino, Salvador (CERN) ; Fiscarelli, Lucio (CERN) ; Fleiter, Jerome (CERN) et al.
In a dipole or in a quadrupole accelerator magnet, the displacement of the coil turns induced by the electromagnetic forces can cause quenches limiting the magnet performance. For this reason, an azimuthal preload is applied to avoid azimuthal movements of the coil up to the required operational current. [...]
arXiv:2204.11944; FERMILAB-PUB-22-223-TD.-
2022-05-10 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4007106
Fulltext: PDF; External link: Fermilab Accepted Manuscript
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4007106
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5.
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Mechanical Consolidation of the LHC Inner Triplet Magnet Supporting System for Remote Alignment
/ Micolon, Frederic (CERN) ; Bourcey, Nicolas (CERN) ; Deschamps, Jean-Baptiste (CERN) ; Herty, Andreas (CERN) ; Le Naour, Sandrine (CERN) ; Mikkola, Tommi (CERN) ; Parma, Vittorio (CERN) ; Ramos, Delio (CERN) ; Rude, Vivien (CERN) ; Sosin, Mateusz (CERN)
Given the high radiation area and the tight alignment tolerances, the LHC inner triplet magnets were designed to be realigned remotely using motorized supporting jacks. However, during run 2 the LHC triplet realignment system started to show an unexpected behavior with erratic load variations on the magnet supporting jacks when operated [...]
Geneva : JACoW, 2021 - 3 p.
- Published in : JACoW IPAC 2021 (2021) 2207-2209
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.2207-2209
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6.
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Progress in the Development of the Nb$_3$Sn MQXFB Quadrupole for the HiLumi Upgrade of the LHC
/ Izquierdo Bermudez, Susana (CERN) ; Ambrosio, Giorgio (Fermilab) ; Apollinari, Giorgio (Fermilab) ; Bajko, Marta (CERN) ; Bordini, Bernardo (CERN) ; Bourcey, Nicolas (CERN) ; Duarte Ramos, Delio (CERN) ; Ferracin, Paolo (LBL, Berkeley) ; Fiscarelli, Lucio (CERN) ; Feher, Sandor (Fermilab) et al.
The high-luminosity upgrade of the Large Hadron Collider (HL-LHC) requires new high field and large-aperture quadrupole magnets for the low-beta inner triplets (MQXF). With a nominal operating gradient of 132.2 T/m in a 150 mm aperture and a conductor peak field of 11.3 T, the new quadrupole magnets are based on Nb3Sn superconducting technology. [...]
FERMILAB-PUB-21-126-TD.-
2021 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4002007
Fulltext: PDF;
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7.
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Fabrication and Power Test of the Second MCBXFB Nested Orbit Corrector Prototype for HL-LHC
/ García-Matos, Jesús A (Madrid, CIEMAT ; Madrid, Polytechnic U.) ; Calero, Jesús (Madrid, CIEMAT) ; Domínguez, Manuel (Madrid, CIEMAT) ; Fernández, Alejandro (Madrid, CIEMAT) ; Gómez, Pablo (Madrid, CIEMAT) ; García-Tabarés, Luis (Madrid, CIEMAT) ; Martínez, Teresa (Madrid, CIEMAT) ; Jardim, Carla Martins (Madrid, CIEMAT) ; Munilla, Javier (Madrid, CIEMAT) ; Pardo, Jose A (Madrid, CIEMAT) et al.
The second prototype of the MCBXFB nested orbit corrector for the upgrade of the LHC has been manufactured at CIEMAT and assembled at CERN, in the framework of the HL-LHC project. This paper describes the changes introduced with respect to the first prototype in order to test some design improvements intended for the series magnets. [...]
2021 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4000605
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8.
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9.
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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
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10.
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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
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