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Scientific Articles

A European Collaboration to Investigate Superconducting Magnets for Next Generation Heavy Ion Therapy
Rossi L, Ballarino A, Barna D, Benedetto E, Calzolaio C, Ceruti G, De Matteis E, Echeandia A, Ekelof T, Farinon S, Felcini E, Gehring M, Kirby G, Lecrevisse T, Lucas J, Mariotto S, Munilla J, Musenich R, Pampaloni A, Pepitone K, Perini D, Popovic D, Prioli M, Pullia M, Quettier L, Sanfilippo S, Senatore C, Shabagin E, Sorbi M, Statera M, Tommasini D, Toral F, Valente R, Veres D, Vieweg M.

IEEE transactions on applied superconductivity. 2022;32(4):1-7

Next generation ion therapy magnets both for gantry and for accelerator (synchrotron) are under investigation in a recently launched European collaboration that, in the frame of the European H2020 HITRIplus and I.FAST programmes, has obtained some funding for work packages on superconducting…

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Heating-Induced Performance Degradation of REBa2Cu3O7–x Coated Conductors: An Oxygen Out-Diffusion Scenario with Two Activation Energies
Bonura M, Cayado Llosa P, Konstantopoulou K, Alessandrini M, Senatore C.

ACS applied electronic materials. 2022;

The degradation of the superconducting properties of REBa2Cu3O7−x coated conductors when heated above 150 °C is a topic of concern for any REBa2Cu3O7−x-based applications. This study makes it clear the role of thermally activated oxygen out-diffusion processes in the modification of the…

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Tomography analysis tool: an application for image analysis based on unsupervised machine learning
Bagni T, Haldi HM, Mauro D, Senatore C.

IOP SciNotes. 2022;3(1):015201

We developed a graphical user interface (GUI) to analyse tomographic images of superconducting Nb 3 Sn wires designed for the next generation accelerator magnets. The Tomography Analysis Tool (TAT) relies on the k -means algorithm, an unsupervised machine learning technique which is widely used to …

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A methodology for the analysis of the three-dimensional mechanical behavior of a Nb3Sn superconducting accelerator magnet during a quench
Ferradas Troitino J, Bajas H, Bianchi L, Castaldo B, Ferracin P, Guinchard M, Izquierdo S, Lorenzo JV, Mangiarotti F, Perez JC, Takala E, Vallone G, Senatore C.

Superconductor Science and Technology. 2021;34(084003)

The fast thermal and electromagnetic transients that occur in a superconducting magnet in case of a quench have the potential of generating large mechanical stresses both in the superconducting coils and in the magnet structure. While the investigation of such quench loads should generally be…

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Design, construction, and testing of no-insulation small subscale solenoids for compact tokamaks
Zhai Y, Berlinger B, Barth C, Senatore C.

Superconductor Science and Technology. 2021;34(105003)

Fusion energy systems studies (FESS) for next-step devices based on the most promising magnetic configurations indicate that high magnetic fields and high current density for magnet coil systems may reduce device size and lower the cost. High current density and radiation resistant fusion magnets…

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Development and large volume production of extremely high current density YBa2Cu3O7 superconducting wires for fusion
Molodyk A, Samoilenkov S, Markelov A, Degtyarenko P, Lee S, Petrykin V, Gaifullin M, Mankevich A, Vavilov A, Sorbom B, Cheng J, Garberg S, Kesler L, Hartwig Z, Gavrilkin S, Tsvetkov A, Okada T, Awaji S, Abraimov D, Francis A, Bradford G, Larbalestier D, Senatore C, Bonura M, Pantoja AE, Wimbush SC, Strickland NM, Vasiliev A.

Scientific Reports. 2021;11(2084)

The fusion power density produced in a tokamak is proportional to its magnetic field strength to the fourth power. Second-generation high temperature superconductor (2G HTS) wires demonstrate remarkable engineering current density (averaged over the full wire), JE, at very high magnetic fields,…

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Effects of the initial axial strain state on the response to transverse stress of high-performance RRP Nb3Sn wires
Ferradas Troitino J, Bagni T, Barth C, Bordini B, Ferracin P, Gamperle L, Tommasini D, Zurmuehle D, Senatore C.

Superconductor Science and Technology. 2021;34(3):035008

High-performance Nb3Sn superconducting wires have become one of the key technologies for the development of next generation accelerator magnets. While their large critical current densities enable the design of compact accelerator-quality magnets for their operation above 10 T, the noticeable…

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HTS Accelerator Magnet and Conductor Development in Europe
Rossi L, Senatore C.

Instruments. 2021;5(8)

In view of the preparation for a post-LHC collider, in 2010 the high-energy physics (HEP) community started to discuss various options, including the use of HTS for very high-field dipoles. Therefore, a small program was begun in Europe that aimed at exploring the possibility of using HTS for…

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In-Field Thermal Conductivity of Ag and Cu/Ag Ba1-xKxFe2As2 Composite Conductors
Bonura M, Huang H, Liu C, Ma Y, Senatore C.

IEEE transactions on applied superconductivity. 2021;31(5):7300105

This work reports the longitudinal thermal conductivity, κ, of Ag- and Cu/Ag-sheathed Ba 1-x K x Fe 2 As 2 conductors. Our investigation has been carried out between 4 K and 80 K with magnetic fields up to 19 T. In the case of Ag-sheathed tapes, the thermal conductivity reaches maximum values of…

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Machine learning applied to X-ray tomography as a new tool to analyze the voids in RRP Nb3Sn wires
Bagni T, Bovone G, Rack A, Mauro D, Barth C, Matera D, Buta F, Senatore C.

Scientific Reports. 2021;11(7767)

The electro-mechanical and electro-thermal properties of high-performance Restacked-Rod-Process(RRP) Nb3Sn wires are key factors in the realization of compact magnets above 15 T for the future particle physics experiments. Combining X-ray micro-tomography with unsupervised machine learning…

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Very high upper critical fields and enhanced critical current densities in Nb3 Sn superconductors based on Nb–Ta–Zr alloys and internal oxidation
Buta F, Bonura M, Matera D, Bovone G, Ballarino A, Hopkins SC, Bordini B, Chaud X, Senatore C.

Journal of Physics: Materials. 2021;4(025003)

The inhibition of Nb3Sn grain growth in the presence of ZrO2 nanoparticles appears to be one of the most promising method for pushing the critical current densities of Nb3Sn superconducting wires to levels that meet the requirements set for the Future Circular Collider. We have investigated the…

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Doctoral Thesis

Mechanical behavior of a Nb3Sn accelerator magnet during a quench
Ferradas Troitino J.

The fast thermal and electromagnetic transients that occur in a superconducting magnet in case of a quench have the potential of generating large mechanical stresses both in the superconducting coils and in the magnet structure. While the investigation of such quench loads should generally be…

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