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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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Analysis of the Mechanical Performance of the 4.2-m-Long MQXFA Magnets for the Hi-Lumi LHC Upgrade
/ Garcia Fajardo, L. (LBL, Berkeley) ; Ambrosio, G. (Fermilab) ; Yahia, A. Ben (Brookhaven) ; Cheng, D.W. (LBL, Berkeley) ; Ferracin, P. (LBL, Berkeley) ; Ferradas Troitino, J. (CERN) ; Izquierdo Bermudez, S. (CERN) ; Muratore, J. (Brookhaven) ; Prestemon, S. (LBL, Berkeley) ; Ray, K.L. (LBL, Berkeley) et al.
Under the U.S. High Luminosity LHC Accelerator Upgrade Project (HL-LHC AUP), the 150 mm bore, high-field Nb3Sn low-{̱e̱ṯa̱}̱ MQXFA quadrupole magnets are being fabricated, assembled and tested, in the context of the CERN Hi-Luminosity LHC (HL-LHC) upgrade. [...]
arXiv:2303.16795; FERMILAB-PUB-23-116-TD.-
2023-03-27 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4003205
Fulltext: 2303.16795 - PDF; 4b8cc3a91b35c5867bfac57ac156409a - PDF; External link: Fermilab Accepted Manuscript
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A Novel Design for Improving the Control on the Stainless-Steel Vessel Welding Process for Superconducting Magnets
/ Vallone, G (LBL, Berkeley) ; Ambrosio, G (Fermilab) ; Anderssen, E (LBL, Berkeley) ; Fehrer, S (Fermilab) ; Ferracin, P (LBL, Berkeley) ; Ferradas Troitino, J (CERN)
Stainless steel vessels see widespread use in superconducting magnets for particle accelerator applications. Their function varies in different magnet designs: they always provide the necessary liquid helium containment, but in some cases are also used to provide azimuthal prestress and can also be welded to the magnet end plate to provide additional longitudinal stiffness. [...]
FERMILAB-PUB-22-858-TD.-
2023 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4001705
Fulltext: PDF; External link: Fermilab Library Server
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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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Challenges and Lessons Learned From Fabrication, Testing, and Analysis of Eight MQXFA Low Beta Quadrupole Magnets for HL-LHC
/ Ambrosio, Giorgio (Fermilab) ; Amm, Kathleen (Brookhaven) ; Anerella, Michael (Brookhaven) ; Apollinari, Giorgio (Fermilab) ; Izquierdo, Gonzalo Arnau (CERN) ; Baldini, Maria (Fermilab) ; Ballarino, Amalia (CERN) ; Barth, Christian (CERN) ; Yahia, Anis Ben (Brookhaven) ; Blowers, James (Fermilab) et al.
By the end of October 2022, the US HL-LHC Accelerator Upgrade Project (AUP) had completed fabrication of ten MQXFA magnets and tested eight of them. The MQXFA magnets are the low beta quadrupole magnets to be used in the Q1 and Q3 Inner Triplet elements of the High Luminosity LHC. [...]
arXiv:2301.09523; FERMILAB-PUB-22-855-TD.-
2023-08 - 8 p.
- Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4003508
Fulltext: 2301.09523 - PDF; 81b192c337ae5d5acaec37450e135529 - PDF; External link: Fermilab Library Server
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