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1.
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Quench Protection of Fusillo Subscale Curved CCT Magnet
/ Wozniak, M (CERN) ; Haziot, A (CERN) ; Mangiarotti, F J (CERN) ; Ravaioli, E (CERN) ; Ferriere, R (CERN) ; Guardia-Valenzuela, Jorge (CERN) ; Foussat, A P (CERN) ; Kirby, G (CERN) ; Verweij, A (CERN)
The Fusillo project at CERN aims to design and build a demonstrator magnet with multi-harmonic corrected fields in a 90° curved CCT magnet. In the first stage, a subscale magnet is built with 30° bending, about 1/30 of the demonstrator conductor length, and increased current to reach coil stresses equivalent to the demonstrator. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4702805
Fulltext: PDF;
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2.
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Curved-Canted-Cosine-Theta (CCCT) Dipole Prototype Development at CERN
/ Haziot, Ariel (CERN) ; Kirby, Glyn (CERN) ; Dallocchio, Alessandro (CERN) ; Devred, Arnaud (CERN) ; Foussat, Arnaud (CERN) ; Gentini, Luca (CERN) ; Mangiarotti, Franco J (CERN) ; Pentella, Mariano (CERN) ; Petrone, Carlo (CERN) ; Pincot, Francois-Olivier (CERN) et al.
Due to its flexibility in generating advanced field harmonic corrections and potential for low cost compared to traditional designs, the Canted Cosine Theta (CCT) configuration is particularly interesting for compact particle accelerators and gantries for medical applications. This article presents the design of a curved demonstrator named Fusillo, a Canted Cosine Theta Nb-Ti dipole magnet that is being developed at CERN, featuring a large aperture of 236 mm, a small bending radius of 1 m, a bending angle of 90$^{\circ }$, and multi-harmonic field correction, with a 3.61 T conductor peak field. [...]
2024 - 8 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4002608
Fulltext: PDF;
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3.
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Fabrication and Test of the Fourth Prototype of the D2 Orbit Corrector Dipole for HL-LHC
/ Ilardi, Veronica (CERN) ; Felice, Hélène (CERN ; IRFU, Saclay, DACM) ; Feuvrier, Jerome (CERN) ; Fiscarelli, Lucio (CERN) ; Foussat, Arnaud P (CERN) ; Kirby, Glyn (CERN) ; Kosowski, Filip (CERN) ; Mangiarotti, Franco J (CERN) ; Pincot, Francois-Olivier (CERN) ; Rogacki, Piotr T (CERN) et al.
As part of the High-Luminosity upgrade project (HL-LHC) for the Large Hadron Collider (LHC) at CERN, new double-aperture beam orbit corrector magnets will be installed near the recombination dipole (D2). These magnets are 2.2 m long Nb–Ti dipoles based on the Canted Cosine-Theta (CCT) design. [...]
2024 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4002006
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4.
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Experimental Examples of Quench Protection With Varistors to Reduce Quench Voltages and Hot-Spot Peak Temperatures
/ Galvin, T ; Kirby, G A (CERN) ; Coll, D ; Mangiarotti, F J (CERN) ; Wu, W ; Ou, X ; Xu, Q (Beijing, Inst. High Energy Phys.) ; Zheng, S ; Nakamoto, T (KEK, Tsukuba) ; Suzuki, K (KEK, Tsukuba)
Superconducting magnet protection must address two main areas of the magnet and circuit performance, namely conductor hot-spot temperatures and circuit voltages. The maximum hot-spot temperatures and voltages occur during the superconductor's transition called a quench and the subsequent energy extraction. [...]
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4702505
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4702505
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5.
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Power Test of the First Two HL-LHC Insertion Quadrupole Magnets Built at CERN
/ Mangiarotti, F J (CERN) ; Willering, G (CERN) ; Fiscarelli, L (CERN) ; Bajko, M (CERN) ; Bottura, L (CERN) ; Desbiolles, V (CERN) ; Devred, A (CERN) ; Ferradas Troitino, J (CERN) ; Izquierdo Bermudez, S (CERN) ; Keijzer, R (CERN ; Twente U., Enschede) et al.
The High-Luminosity project (HL-LHC) of the
CERN Large Hadron Collider (LHC), requires low β* quadrupole
magnets in Nb$_3$Sn technology that will be installed on each side
of the ATLAS and CMS experiments. After a successful shortmodel magnet manufacture and test campaign, the project has
advanced with the production, assembly, and test of full-size 7.15-
m-long magnets. [...]
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 1-5
Fulltext: PDF;
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6.
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Modelling V-I Measurements of Nb$_3$Sn Accelerator Magnets With Conductor Degradation
/ Keijzer, Ruben (CERN ; Twente U., Enschede) ; Succi, Giovanni (CERN) ; Willering, Gerard (CERN) ; Bordini, Bernardo (CERN) ; Bottura, Luca (CERN) ; Mangiarotti, Franco J (CERN) ; Dhallé, Marc (Twente U., Enschede) ; Kate, Herman H J Ten (Twente U., Enschede)
In the framework of the High-Luminosity Large Hadron Collider (HL-LHC) project, 11 T dipole and MQXF quadrupole magnets employing Nb$_3$Sn technology have been tested in short and long test configurations. Nb$_3$Sn magnets are more sensitive than Nb-Ti magnets to a potential degradation of their conductors during production, testing, and cycling operation. At CERN, new diagnostic tools and measurement procedures have been developed to investigate, in detail, the performance of Nb$_3$Sn accelerator type magnets. [...]
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4001105
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4001105
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7.
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Superconductors for fusion: a roadmap
/ Mitchell, Neil (Euratom, St. Paul Lez Durance) ; Zheng, Jinxing (Hefei, Inst. Plasma Phys.) ; Vorpahl, Christian (EFDA-CSU, Garching) ; Corato, Valentina (ENEA, Frascati) ; Sanabria, Charlie (Unlisted, US) ; Segal, Michael (Unlisted, US) ; Sorbom, Brandon (Unlisted, US) ; Slade, Robert (Unlisted, GB) ; Brittles, Greg (Unlisted, GB) ; Bateman, Rod (Unlisted, GB) et al.
With the first tokamak designed for full nuclear operation now well into final assembly (ITER), and a major new research tokamak starting commissioning (JT60SA), nuclear fusion is becoming a mainstream potential energy source for the future. A critical part of the viability of magnetic confinement for fusion is superconductor technology. [...]
2021 - 57 p.
- Published in : Supercond. Sci. Technol. 34 (2021) 103001
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8.
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Powering Performance and Endurance Beyond Design Limits of HL-LHC Low-Beta Quadrupole Model Magnets
/ Mangiarotti, Franco J (CERN) ; Ferradas Troitino, Salvador (CERN) ; Duda, Michal (Cracow, INP) ; Bajko, Marta (CERN) ; Bottura, Luca (CERN) ; Desbiolles, Vincent (CERN) ; Elekes, Gyopar (Babes-Bolyai U.) ; Ferradas Troitino, Jose (METROLAB, Geneva ; CERN) ; Feuvrier, Jerome (CERN) ; Ferracin, Paolo (LBNL, Berkeley) et al.
For the High Luminosity Upgrade project (HL-LHC) of the CERN Large Hadron Collider (LHC), lower β* quadrupole magnets based on advanced Nb 3 Sn conductors will be installed on each side of the ATLAS and CMS interaction points. To quantify the endurance and technological limits of these magnets, beyond their maximum operational conditions, two short length model magnets have been extensively tested at the CERN SM18 test facility. [...]
2021 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4000805
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9.
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Assessment of MQXF Quench Heater Insulation Strength and Test of Modified Design
/ Baldini, Maria (Fermilab) ; Ambrosio, Giorgio (Fermilab) ; Anerella, Michael D (Brookhaven) ; Bermudez, Susana I (CERN) ; Bossert, Rodger C (Fermilab) ; Ferracin, Paolo (LBL, Berkeley) ; Krave, Steven (Fermilab) ; Mangiarotti, Franco J (CERN) ; Marinozzi, Vittorio (Fermilab) ; Nobrega, Alfred (Fermilab) et al.
The HL-LHC interaction region magnet triplets (Q1,Q2, and Q3) will be composed of superconducting Nb3Sn quadru-poles. The MQXF quadrupole protection system is based on CLIQ (Coupling-Loss Induced Quench system) and outer layer quench heaters.This paper reports a summary of quench heaters to coil high voltage tests performed on MQXF short and long coils in air after fabrication, and in air and He gas after magnet training. [...]
FERMILAB-PUB-20-617-TD.-
2021 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4701305
Fulltext: PDF; External link: Fermilab Accepted Manuscript
In : Applied Superconductivity Conference, Online, 24 Oct - 7 Nov 2020
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10.
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Test of the First Full-Length Prototype of the HL-LHC D2 Orbit Corrector Based on Canted Cosine Theta Technology
/ Mangiarotti, Franco J (CERN) ; Duda, Michal (Cracow, INP ; CERN) ; Fiscarelli, Lucio (CERN) ; Kirby, Glyn (CERN) ; Bajko, Marta (CERN) ; Coll, Dominic (Unlisted, GB) ; Desbiolles, Vincent ; Feuvrier, Jerome (CERN) ; Guyon, Jean-Luc (CERN) ; Mazet, Jacky (CERN) et al.
In the context of CERN's high-luminosity upgrade project (HL-LHC) for the Large Hadron Collider (LHC), a new double aperture beam orbit corrector magnets will be installed near the recombination dipole (D2). These 2.2 m long NbTi dipoles are built with the canted cosine theta (CCT) technique. [...]
2020 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 30 (2020) 4000505
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