FEM Analysis of Hybrid LTS/HTS Cos-Theta Dipole Magnet

Conference · Fri Sep 06 04:00:00 EDT 2024

DOI:https://doi.org/10.2172/2440018· OSTI ID:2440018

D'Agliano, A. ^[1]; Novitski, I. ^[2]; Zlobin, A. ^[2]; Barzi, E. ^[2]; Turrioni, D. ^[2]; Donati, S. ^[1]; Giusti, V. ^[1]

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1. INFN, Pisa; Pisa U.
2. Fermilab

After the recent results on Bi-2212 superconductive magnets realized and tested in canted cosine-theta and solenoid designs, respectively, at Lawrence Berkeley National Laboratory (LBNL) and NHMFL, the first Bi-2212 stress-managed cosine-theta insert magnet is in the assembly phase at Fermilab. This insert will be part of the first hybrid cosine-theta magnet made of Nb3Sn outer layers within the US-MDP effort to reach 20 T bore field. This paper reports the analytical analysis of the cosine-theta Nb3Sn/Bi-2212 hybrid magnet. As an introduction, it shows the validation of the finalized HTS coils' design optimized using the ROXIE code. Subsequently, it reports the parameters, logic, and implementation method of the 2D electromagnetic and mechanical FEM analysis of the LTS/HTS hybrid magnet. Results from the ANSYS detailed model made with sub-modeling geometry are compared with the homogeneous model implemented in the past. Moreover, a Python code was implemented to simulate the current degradation due to stresses in the detail-modeled conductor areas. The current degradation is introduced in the simulation dynamics for both conductors as an iteration process during the energization load step only after applying pre-stress and thermal loads. The numerical and graphic results of the 2D cosine-theta LTS/HTS magnet cross-section will be described and analyzed.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 2440018
• Report Number(s): FERMILAB-POSTER-24-0270-TD-V; oai:inspirehep.net:2825659
• Country of Publication: United States
• Language: English