D'Agliano Alessio

Alessio D’Agliano | LinkedIn

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Cycle: XXXVIII

Curriculum: Industrial Engineering

Title of the PhD Project: High-field high/low temperature superconducting hybrid magnets for particle accelerators: design and construction

Supervisor(s): Prof. Simone Donati, Prof. Valerio Giusti (Università di Pisa), Prof. Emanuela Barzi (Fermilab).

In collaboration with: U.S. Magnet Development Program (U.S. MDP)

Abstract of the PhD project:

The U.S. Magnet Development Program (U.S.-MDP) explores high-field accelerator magnets compatible with operational conditions beyond the limits of Nb₃Sn technology. The ongoing R&D on High-Temperature Superconductors (HTS) suggests using Bi₂Sr₂CaCu₂O_8-x (Bi-2212) as a superconducting element. For this reason, Fermilab is developing the first Bi-2212 stress-managed cosine-theta insert magnet within Area I of the U.S.-MDP. The insert will be part of the first hybrid cosine-theta magnet, characterized by two inner HTS coils and two external Nb₃Sn coils, aiming to reach a 20 T bore field. This thesis is centered on the design and construction of the Bi-SMCT1 insert. At first, the magnetic and mechanical analyses of the standalone insert dipole performed in ANSYS APDL are presented. These simulation results validated the final magnet design. Subsequently, the analytical analyses of the full 4-layer Bi-2212/Nb₃Sn hybrid dipole magnet are reported. The FEM simulation of the hybrid magnet aimed to predict the critical-current degradation of both superconductors during powering at 16 T. All Rutherford cables in the coils of the hybrid magnet were modeled at the strand level using the heterogeneous cable model. The analysis integrates strain-dependent critical current laws, with parameters derived from experimental data, to simulate the hybrid magnet’s performance across the entire 2D space of I_LTS and I_HTS current-powering configurations. The parametric nature of the proposed methodology enables a detailed assessment of conductor integrity and I_c(B, T, ε) reduction in various magnet designs, providing a versatile and rigorous framework for optimizing future high-field hybrid magnets. In conclusion, the fabrication and assembly process of the first Bi-SMCT1 insert is presented and discussed.

Publications – InspireHEP , Scopus

Orcid ID – ORCID

Articles

1. D'Agliano, A.V. Zlobin, I. Novitski, G. Vallone, P. Ferracin et al., “A Computational Procedure for Assessing I_c(ε) in Nb₃Sn/Bi-2212 Hybrid Magnets”, 2512.10119, DOI: 10.1109/TASC.2025.3624725, IEEE Trans.Appl.Supercond. 36 (2026) 3, 1-5.
   
   
2. D'Agliano, A.V. Zlobin, I. Novitski, D. Turrioni, E. Barzi et al., “Magnetic and Mechanical Analysis of Bi-2212 Rutherford Cable in a Cos-Theta Sub-Scale Dipole Coil”, 2504.12028, DOI: 10.1088/1361-6668/adb340, Supercond.Sci.Technol. 38 (2025) 3, 035021.
   
   
3. D'Agliano, A.V. Zlobin, I. Novitski, D. Turrioni, E. Barzi et al., “FEM Analysis of Hybrid LTS/HTS Cos-Theta Dipole Magnet With Heterogeneous Cable Model”, DOI: 10.1109/TASC.2024.3502578, IEEE Trans.Appl.Supercond. 35 (2025) 5, 4000105.

Conferences

1. US-MDP Collaboration Meeting, Brookhaven National Laboratory (BNL), 21 – 24 March 2023
2. MT-28 International Conference on Magnet Technology, ITER Organization, Aix-en-Provence, 10 – 15 September 2023
3. US-MDP Collaboration Meeting, Fermilab (FNAL), 30 April – 3 May 2024
4. Applied Superconductivity Conference (ASC 2024), Salt Lake City (UT), 1 – 6 September 2024
5. CEC/ICMC 2025, Reno (NV), 18 – 22 May 2025
6. US-MDP Collaboration Meeting, Lawrence Berkeley National Laboratory (LBNL), 28 – 30 May 2025
7. MT-29 International Conference on Magnet Technology, Boston (MA), 1 – 6 July 2025
8. European Conference on Applied Superconductivity (EUCAS 2025), Porto, 21 – 25 September 2025