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1.
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Residual resistance ratio measurement system for Nb$_3$Sn wires extracted from Rutherford cables
/ Pong, Ian (LBNL, Berkeley) ; Baskys, Algirdas (LBL, Berkeley ; CERN) ; Sanabria, Charlie (LBL, Berkeley ; MIT) ; Naus, Michael (LBNL, Berkeley) ; Myers, Scott (LBNL, Berkeley) ; Pan, Heng (LBL, Berkeley ; UESTC, Chengdu) ; Lee, Jonathan (LBL, Berkeley ; Natl. High Mag. Field Lab.) ; Wang, Li (LBNL, Berkeley) ; Taylor, Jordan (LBL, Berkeley) ; Turqueti, Marcos (LBNL, Berkeley) et al.
Residual resistance ratio (RRR) of superconducting strands is an important parameter for magnet electrical stability. RRR serves as a measure of the low-temperature electrical conductivity of the copper within a conductor that has a copper stabilization matrix. [...]
2024 - 9 p.
- Published in : Cryogenics 146 (2025) 104002
Fulltext: PDF;
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2.
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MQXFA Final Design Report
/ Ambrosio, Giorgio
The MQXFA Quadrupole magnets will be installed in High Luminosity LHC to form the Q1 and Q3 inner triplet optical elements in front of the interaction points 1 (ATLAS) and 5 (CMS) [...]
arXiv:2203.06723 ; FERMILAB-TM-2773-TD ; US-HiLumi-doc-948
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120.
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3.
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Failure Assessments for MQXF Magnet Support Structure with a Graded Approach
/ Pan, Heng (LBL, Berkeley) ; Anderssen, Eric C (LBL, Berkeley) ; Cheng, Daniel W (LBL, Berkeley) ; Prestemon, Soren O (LBL, Berkeley) ; Ambrosio, Giorgio (Fermilab)
The High-Luminosity Large Hadron Collider (HLLHC) upgrade requires new quadrupoles, MQXF, to replace the present LHC inner triplets. The MQXFA magnet is the first prototype that has a 150 mm aperture and uses Nb3Sn superconducting technology in a 4.2 m magnetic length structure. [...]
FERMILAB-PUB-19-057-TD.-
2019 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 8401507
Fulltext: PDF; External link: Fermilab Accepted Manuscript
In : Applied Superconductivity Conference 2018, Seattle, United States Of America, 28 Oct - 2 Nov 2018, pp.8401507
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4.
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Lessons learned from the prototypes of the MQXFA Low Beta Quadrupoles for HL-LHC and status of production in the US
/ Ambrosio, Giorgio (Fermilab) ; Amm, Kathleen (BNL, NSLS) ; Anerella, Michael (BNL, NSLS) ; Apollinari, Giorgio (Fermilab) ; Baldini, Maria (Fermilab) ; Blowers, Jamie (Fermilab) ; Bossert, Rodger (Fermilab) ; Carcagno, Ruben (Fermilab) ; Cheng, Daniel W (BNL, NSLS) ; Chlachidze, Guram (Fermilab) et al.
With the successful test of the first two pre-series magnets the US HL-LHC Accelerator Upgrade Project has started production of the MQXFA magnets to be used in Q1/Q3 inner triplet elements of the HL-LHC. This good start comes after the test of two prototypes with limited performance, and it demonstrates the importance of learning from past issues. [...]
FERMILAB-PUB-20-618-TD.-
2021 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4001105
Fulltext: PDF;
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5.
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Magnetic Field Measurements of First Pre-series Full-Length 4.2 m Quadrupole MQXFA03 Using PCB Rotating Coils for the Hi-Lumi LHC Project
/ Song, Honghai (Stony Brook U.) ; Ambrosio, Giorgio (Fermilab) ; Amm, Kathleen (Brookhaven) ; Anerella, Michael (Brookhaven) ; Apollinari, Giorgio (Fermilab) ; Cheng, Daniel (LBNL) ; Chlachidze, Guram (Fermilab) ; DiMarco, Joseph (Fermilab) ; Feher, Sandor (Fermilab) ; Ferracin, Paolo (LBNL) et al.
The U.S. Hi-Lumi LHC Accelerator Upgrade Project (AUP) and CERN have joined efforts to develop high field quad-rupoles for the Hi-Lumi LHC upgrade. [...]
FERMILAB-PUB-21-038-TD.-
2021 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4000207
Fulltext: PDF; External link: Fermilab Accepted Manuscript
In : Applied Superconductivity Conference, Online, 24 Oct - 7 Nov 2020, pp.4000207
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6.
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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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7.
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Fracture failure analysis for MQXFA magnet aluminum shells
/ Pan, Heng (LBNL, Berkeley) ; Anderssen, Eric C (LBNL, Berkeley) ; Ambrosio, Giorgio (Fermilab) ; Cheng, Daniel W (LBNL, Berkeley) ; Ferracin, Paolo (CERN) ; Prestemon, Soren O (LBNL, Berkeley) ; Takala, Eelis Tapani (CERN) ; Vallone, Giorgio (LBNL, Berkeley)
The High-Luminosity LHC Accelerator Upgrade Project (HL-LHC AUP) is approaching the production phase of the US-contributed Q1 and Q3 Interaction Region Quadrupoles (MQXFA). The structures for the MQXFA prototypes were design and inspected by the US-LARP (LHC Accelerator Research Program), AUP developed criteria, which will be used for the pre-series structures. [...]
FERMILAB-PUB-20-118-TD.-
2020 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 30 (2020) 4002307
Fulltext: PDF; External link: Fermilab Accepted Manuscript
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8.
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Mechanical Performance of the First Two Prototype 4.5 m Long Nb$_3$Sn Low-$β$ Quadrupole Magnets for the Hi-Lumi LHC Upgrade
/ Cheng, Daniel W (LBL, Berkeley) ; Ambrosio, Giorgio (Fermilab) ; Anderssen, Eric C (LBL, Berkeley) ; Ferracin, Paolo (CERN) ; Grosclaude, Philippe (CERN) ; Guinchard, Michael (CERN) ; Muratore, Joseph (Brookhaven) ; Pan, Heng (LBL, Berkeley) ; Prestemon, Soren O (LBL, Berkeley) ; Vallone, Giorgio (LBL, Berkeley)
The U.S. High-Luminosity LHC Accelerator Upgrade Project (HL-LHC AUP) team is collaborating with CERN in the design and fabrication of the first 4.5 m long MQXFA magnets, a 150 mm aperture high-field Nb$_3$Sn quadrupole magnet that uses the aluminum shell-based bladder-and-key technology. [...]
FERMILAB-PUB-20-117-TD.-
2020 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 30 (2020) 4000906
Fulltext: PDF; External link: Fermilab Accepted Manuscript
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9.
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Summary of the Mechanical Performances of the 1.5 m Long Models of the Nb$^3$Sn Low-$\beta$ Quadrupole MQXF
/ Vallone, Giorgio (LBL, Berkeley) ; Ambrosio, Giorgio (Fermilab) ; Anderssen, Eric C (LBL, Berkeley) ; Bajas, Hugo (CERN) ; Bourcey, Nicolas (CERN) ; Cheng, Daniel W (LBL, Berkeley) ; Chlachidze, Guram (Fermilab) ; Ferracin, Paolo (CERN) ; Grosclaude, Philippe (CERN) ; Guinchard, Michael (CERN) et al.
/LARP
The Nb3Sn quadrupole MQXF is being developed as a part of the LHC High Luminosity upgrade. The magnet design was tested on 1:5m long short models, sharing the same cross-section with the full-length magnets. [...]
FERMILAB-PUB-19-052-TD.-
2019 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4002805
Fulltext: PDF;
In : Applied Superconductivity Conference 2018, Seattle, United States Of America, 28 Oct - 2 Nov 2018, pp.4002805
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10.
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Assembly of a Mechanical Model of MQXFB, the 7.2-m-Long Low-$\beta$ Quadrupole for the High-Luminosity LHC Upgrade
/ Vallone, Giorgio (LBL, Berkeley) ; Ambrosio, Giorgio (Fermilab) ; Anderssen, Eric (LBL, Berkeley) ; Bourcey, Nicolas (CERN) ; Cheng, Daniel W (LBL, Berkeley) ; Ferracin, Paolo (CERN) ; Grosclaude, Philippe (CERN) ; Guinchard, Michael (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Juchno, Mariusz (LBL, Berkeley) et al.
The ${\rm Nb_{3}Sn}$low-$\beta$quadrupole MQXF is being developed as a part of the High-Luminosity large hadron collider (LHC) upgrade project. The magnet will be produced in two different configurations, sharing the same cross section but with different lengths. [...]
FERMILAB-PUB-19-053-TD.-
2019 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4000605
Fulltext: PDF;
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