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1.
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Weld Qualification of the Cold Mass of the Superconducting Quadrupoles Magnets (MQXF) for the HL-LHC Project
/ Castro, Enrique Rodriguez (Carlos III U., Madrid) ; Aviles Santillana, Ignacio (CERN) ; Sgobba, Stefano (CERN) ; Izquierdo, Gonzalo Arnau (CERN) ; Bonnin, Simon (CERN) ; Bampton, Tavis (CERN) ; Prin, Herve (CERN) ; Todesco, Ezio (CERN) ; Navas, Elisa Maria Ruiz (Carlos III U., Madrid)
The High Luminosity Large Hadron Collider (HL-LHC) is a major upgrade to the existing Large Hadron Collider (LHC) at CERN, aimed at increasing the integrated luminosity of the collider by a factor of ten [1]. A key component of the HL-LHC are the superconducting Nb3Sn quadrupole magnets, known as MQXF, whose purpose is to focus the particle beam [3]. [...]
2024 - 4 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 9000904
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2.
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A Translating-Coil Magnetometer for the Magnetic Measurements of the HL-LHC High-Order Corrector Magnets at Room Temperature
/ Pentella, Mariano (CERN) ; Dalane, Eivind (CERN) ; De Matteis, Ernesto (LASA, Segrate) ; Gautheron, Emma L (CERN) ; Mariotto, Samuele (LASA, Segrate) ; Petrone, Carlo (CERN) ; Prin, Herve (CERN) ; Prioli, Marco (LASA, Segrate) ; Russenschuck, Stephan (CERN) ; Statera, Marco (LASA, Segrate) et al.
This article describes the design and development of a translating-coil magnetometer for the room-temperature magnetic measurements of the superferric, high-order corrector magnets for the high-luminosity upgrade of the Large Hadron Collider at CERN (HL-LHC). The measurement system consists of a set of induction coils, tangentially positioned on a measurement head. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 9000505
Fulltext: PDF;
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3.
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Status of the MQXFB Nb$_3$Sn quadrupoles for the HL-LHC
/ Izquierdo Bermudez, Susana (CERN) ; Ambrosio, Giorgio (Fermilab) ; Apollinari, Giorgio (Fermilab) ; Ballarino, Amalia (CERN) ; Barth, Christian (CERN) ; Crouvizier, Mickael Denis (CERN) ; Duarte Ramos, Delio (CERN) ; Devred, Arnaud (CERN) ; Feher, Sandor (Fermilab) ; Felice, Helene (CERN) et al.
The cold powering test of the first two prototypes of the MQXFB quadrupoles (MQXFBP1, now disassembled, and MQXFBP2), the Nb3Sn inner triplet magnets to be installed in the HL-LHC, has validated many features of the design, such as field quality and quench protection, but has found performance limitations. In fact, both magnets showed a similar phenomenology, characterized by reproducible quenches in the straight part inner layer pole turn, with absence of training and limiting the performance at 93% (MQXFBP1) and 98% (MQXFBP2) of the nominal current at 1.9 K, required for HL-LHC operation at 7 TeV. [...]
FERMILAB-PUB-22-860-TD.-
2023 - 9 p.
- Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4001209
Fulltext: PDF; External link: Fermilab Library Server
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4.
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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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5.
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The HL-LHC Low-$\beta$ Quadrupole Magnet MQXF: from Short Models to Long Prototypes
/ Ferracin, Paolo (CERN) ; Ambrosio, Giorgio (Fermilab) ; Anerella, Michael (Brookhaven) ; Bajas, Hugues (CERN) ; Bajko, Marta (CERN) ; Bordini, Bernardo (CERN) ; Bossert, Rodger (Fermilab) ; Bourcey, Nicolas (CERN) ; Cheng, Daniel W (LBL, Berkeley) ; Chlachidze, Guram (Fermilab) et al.
Among the components to be upgraded in LHC inter- action regions for the HiLumi-LHC projects are the inner triplet (or low-β) quadrupole magnets, denoted as Q1, Q2a, Q2b, and Q3. The new quadrupole magnets, called MQXF, are based on Nb3 Sn superconducting magnet technology and operate at a gradient of 132.6 T/m, with a conductor peak field of 11.4 T. [...]
FERMILAB-PUB-19-008-TD.-
2019 - 9 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4001309
- Published in : IEEE Trans. Appl. Supercond. 30 (2020) 9700701
Fulltext: PDF;
In : Applied Superconductivity Conference 2018, Seattle, United States Of America, 28 Oct - 2 Nov 2018, pp.4001309
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6.
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Design and Construction of the Full-Length Prototype of the 11-T Dipole Magnet for the High Luminosity LHC Project at CERN
/ Savary, Frederic (CERN) ; Bordini, Bernardo (CERN) ; Fiscarelli, Lucio (CERN) ; Foussat, A P (CERN) ; Grand-Clement, Ludovic (CERN) ; Lackner, Friedrich (CERN) ; Loffler, C H (CERN) ; Semeraro, Michela (CERN) ; Smekens, David (CERN) ; Duarte Ramos, Delio (CERN) et al.
The luminosity upgrade of the Large Hadron Collider (LHC) at CERN requires the installation of additional collimators in the dispersion suppressor regions of the accelerator. The upgrade foresees the installation of one additional collimator on either side of interaction point 7 (IP7) at the location of the existing main dipoles (MBs) that will be replaced by shorter and more powerful dipoles, and of one additional collimator on either side of IP2 at the location of existing empty cryostats. [...]
2018 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4007106
In : 25th International Conference on Magnet Technology, Amsterdam, The Netherlands, 27 Aug - 1 Sep 2017, pp.4007106
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7.
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Status of the Long MQXFB Nb$_3$Sn Coil Prototype Production for the HiLumi LHC
/ Lackner, Friedrich (CERN) ; Ferracin, Paolo (CERN) ; Todesco, Ezio (CERN) ; Triquet, Stephan (CERN) ; Pozzobon, Marc (CERN) ; Luzieux, S (CERN) ; Perez, Juan Carlos (CERN) ; Scheuerlein, Christian (CERN) ; Cavanna, Eugenio (ASG Supercond., Genova) ; Ohnweiler, Timm (Carbolite Gero) et al.
The high luminosity Large Hadron Collider (LHC) upgrade target is to increase the integrated luminosity by a factor 10, resulting in an integrated luminosity of 3000 fb-1. One major improvement foreseen is the reduction of the beam size at the collision points. [...]
2017 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 27 (2017) 4002605
In : Applied Superconductivity Conference, Denver, CO, USA, 4 - 9 Sep 2016, pp.4002605
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8.
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Design Optimization of the $Nb_3Sn$ 11 T Dipole for the High Luminosity LHC
/ Nilsson, Emelie (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Ballarino, Amalia (CERN) ; Bordini, Bernardo (CERN) ; Bottura, Luca (CERN) ; Fleiter, Jerome (CERN) ; Lackner, Friedrich (CERN) ; Loffler, Christian (CERN) ; Perez, Juan Carlos (CERN) ; Prin, Herve (CERN) et al.
Abstract: As a part of the large hadron collider luminosity upgrade (HiLumi-LHC) program, CERN is planning to replace some of the 8.33-T 15-m-long Nb-Ti LHC main dipoles with shorter 11 T Nb$_{3}$Sn magnets providing longitudinal space for additional collimators. Whereas the present design of the 11 T dipole enables the use of RRP conductor with critical current degradation after cabling at the level of 5%, new cross sections of the cable have been studied in order to further decrease the degradation of both critical current and resistivity of the copper matrix. [...]
2017 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 27 (2017) 4001005
In : Applied Superconductivity Conference, Denver, CO, USA, 4 - 9 Sep 2016, pp.4001005
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9.
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Progress on the Development of the $Nb_3Sn$ 11T Dipole for the High Luminosity Upgrade of LHC
/ Savary, Frederic (CERN) ; Bajko, Marta (CERN) ; Bordini, Bernardo (CERN) ; Bottura, Luca (CERN) ; Fiscarelli, Lucio (CERN) ; Fleiter, Jerome (CERN) ; Foussat, Arnaud (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Karppinen, Mikko (CERN) ; Lackner, Friedrich (CERN) et al.
The high-luminosity large hadron collider (LHC) project at CERN entered into the production phase in October 2015 after the completion of the design study phase. In the meantime, the development of the 11 T dipole needed for the upgrade of the collimation system of the machine made significant progress with very good performance of the first two-in-one magnet model of 2-m length made at CERN. [...]
FERMILAB-CONF-16-676.-
2017 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 27 (2017) 4003505
Fulltext: PDF; External link: FERMILABCONF
In : Applied Superconductivity Conference, Denver, CO, USA, 4 - 9 Sep 2016, pp.4003505
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10.
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Integration of the 11-T Nb$_{3}$Sn Dipoles and Collimators in the LHC
/ Ramos, Délio (CERN) ; Savary, Frederic (CERN) ; Prin, Hervé (CERN) ; Parma, Vittorio (CERN) ; Hrivnak, Jan (CERN) ; Mucher, Christophe (CERN) ; Gentini, Luca (CERN) ; Redaelli, Stefano (CERN)
The Large Hadron Collider (LHC) collimation system upgrade plan comprises new collimators in the dispersion suppressors. The length required for each collimator along the LHC lattice is obtained by replacing an LHC main dipole and its cryostat with two shorter but stronger 11-T Nb_3Sn magnets keeping the equivalent integrated field of the dipole removed. [...]
2016 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 26 (2016) 3800105
In : 24th International Conference on Magnet Technology, Seoul, Korea, 18 - 23 Oct 2015, pp.3800105
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