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1.
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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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2.
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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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3.
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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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4.
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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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5.
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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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6.
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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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7.
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Preload Characterization of Short Models of MQXF the Nb$_3$Sn Low-$β$ Quadrupole for the Hi-Lumi LHC
/ Takala, Eelis (CERN) ; Ambrosio, Giorgio (Fermilab) ; Bourcey, Nicolas (CERN) ; Cheng, Daniel W (LBL, Berkeley) ; Ferracin, Paolo (CERN) ; Guinchard, Michael (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Mangiarotti, Franco (CERN) ; Pan, Heng (LBL, Berkeley) ; Perez, Juan Carlos (CERN) et al.
MQXF is the Nb$_3$Sn Low-β Quadrupole magnet that the HL-LHC project is planning to install in the LHC interaction regions in 2026 as part of an upgrade to increase the LHC inte-grated luminosity by about a factor of ten. The magnet will be fab-ricated in two different lengths: 4.2 m for MQXFA, built in the US by the Accelerator Upgrade Project (AUP), and 7.15 m for MQXFB, fabricated by CERN. [...]
FERMILAB-PUB-20-119-TD.-
2020 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 30 (2020) 4002806
Fulltext: PDF; External link: Fermilab Accepted Manuscript
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8.
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Tests of the FRESCA2 100 mm bore Nb$_3$Sn block-coil magnet to a record field of 14.6 T
/ Willering, Gerard (CERN) ; Arnestad, Havard (CERN) ; Bajko, Marta (CERN) ; Bajas, Hugo (CERN) ; Bortot, Lorenzo (CERN) ; Bottura, Luca (CERN) ; Bourcey, Nicolas (CERN) ; Duda, Michal (CERN ; Cracow, INP) ; Ferracin, Paolo (CERN) ; Feuvrier, Jerome (CERN) et al.
The Nb$_3$Sn block coil dipole magnet FRESCA2 was developed within the framework of a collaboration between CEA Saclay and CERN, in the continuity of the European project EuCARD and EuCARD2. With an aperture of 100 mm and a target bore field of 13 T at 10.6 kA, the magnet is required for a new FRESCA2 cable test facility at CERN. [...]
2019 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4004906
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9.
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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
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10.
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Engineering design and fabrication of the nested orbit corrector prototype for HL-LHC
/ García-Matos, Jesús Ángel (Madrid, CIEMAT ; Madrid, Escuela Tec. Sup. Ing. Ind.) ; Abramian, Pablo (Madrid, CIEMAT) ; Calero, Jesús (Madrid, CIEMAT) ; Fernández, Alejandro (Madrid, CIEMAT) ; García-Tabarés Rodriguez, Luis (Madrid, CIEMAT) ; Gómez, Pablo (Madrid, CIEMAT) ; López, Daniel (Madrid, CIEMAT) ; Munilla, Javier (Madrid, CIEMAT) ; Pardo, José Antonio (Madrid, CIEMAT) ; Sobrino, Pablo (Madrid, CIEMAT) et al.
MCBXF magnets are nested orbit correctors, needed for the upgrade of the large hadron collider (LHC), in the framework of the high luminosity (HL) LHC project. There are two versions with different physical lengths, 1.5 and 2.5 m, which share the same cross section to decrease fabrication costs. [...]
2019 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4002205
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