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High Field Magnet Programme -- European Strategy Input
/ Alfonso, L. (INFN, Parma) ; Ambrosio, G. (Fermilab) ; Araujo, D. (PSI, Villigen) ; Arpaia, P. (INFN, Parma) ; Auchmann, B. (PSI, Villigen ; CERN) ; Axensalva, J. (CERN) ; Balconi, L. (INFN, Milan ; Milan U. ; INFN, Parma) ; Ballarino, A. (CERN) ; Barzi, E. (Ohio State U. ; Unlisted) ; Baskys, A. (CERN) et al.
In this submission, we describe research goals, implementation, and timelines of the High Field Magnet Programme, hosted by CERN. [...]
arXiv:2504.16885 ; FERMILAB-PUB-25-0283-TD.
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15.
Fermilab Library Server - Fulltext - Fulltext
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e-book
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Construction and Analysis of a Modified Nb3Sn 11 T Short Dipole Model
/ Cabrera, Carmen Abad (CERN) ; Perini, Diego (CERN) ; Bampton, Tavis Alexander (CERN) ; Bahmane, Oussama Id (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Bourcey, Nicolas (CERN) ; Devred, Arnaud (CERN) ; Vez, Ruth Diaz (CERN) ; Garion, Cedric (CERN) ; Guinchard, Michael (CERN) et al.
The 5.2-m-long, 11 T double-aperture Nb3Sn Dipole
Magnet was designed to replace some of the standard, 15-m-long
8.3 T Nb–Ti main dipole magnets in the Large Hadron Collider.
After the production and test of several of 2-m-long models, the
test of full-length 11 T series magnets revealed signs of performance
degradation in the coil ends after a sequence of electromagnetic and
thermal cycles. The possible sources for performance degradation
were categorized into two groups: issues internal to the coils and
issues with the coil support structure, in particular in the magnet
ends. [...]
2025 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 35 (2025) 1-7
Fulltext: PDF;
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Towards MQXFB Series Coils
/ Lusa, Nicholas (CERN) ; Devred, Arnaud (CERN) ; Ferradas Troitino, José (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Milanese, Attilio (CERN) ; Quassolo, Penelope Matilde (CERN) ; Straarup, Simon (CERN) ; Todesco, Ezio (CERN)
The cold powering test of the first two MQXFB prototype quadrupoles, the Nb$_3$Sn inner triplet magnets to be installed in the HL-LHC, has found performance limitations. This prompted putting on hold the coil fabrication, to review in depth the full manufacturing process, while in parallel performing destructive inspections on selected coils. [...]
2024 - 8 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4003408
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Status of MQXFB quadrupole magnets for HL-LHC
/ Milanese, A (CERN) ; Ambrosio, G (Fermilab) ; Apollinari, G (Fermilab) ; Axensalva, J (CERN) ; Baldini, M (Fermilab) ; Ballarino, A (CERN) ; Barth, C (CERN) ; o, R Carcagn (Fermilab) ; Crouvizier, M (CERN) ; Devred, A (CERN) et al.
The MQXFB magnets are superconducting quadrupoles with nominal peak field on the conductor of 11.3 T. With their magnetic length of 7.2 m, they stand as the longest Nb3Sn accelerator magnets designed and manufactured up to now. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) WEPM060
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPM060
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7.
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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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Status and challenges of the interaction region magnets for HL-LHC
/ Todesco, E (CERN) ; Izquierdo Bermudez, S (CERN) ; Foussat, A (CERN) ; Gautheron, E (CERN) ; Kirby, G (CERN) ; Felice, H (CERN) ; Perez, J C (CERN) ; Fleiter, J (CERN) ; Barth, C (CERN) ; Milanese, A (CERN) et al.
About one hundred magnets of six different types shall be installed in the High Luminosity LHC (HL-LHC) in the years 2026-2028 at CERN. The magnets design, construction and test are based on CERN collaborations with institutes and industrial partners in USA, Spain, Italy, Japan and China. [...]
FERMILAB-PUB-22-861-TD.-
2023 - 8 p.
- Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4001608
Fulltext: PDF; External link: Fermilab Accepted Manuscript
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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; 3eb6eaa164998b3b75b795795e9c0bc4 - PDF; FERMILAB-PUB-22-911-TD - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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