FEA Model and Mechanical Analysis of the Nb ₃ Sn 15-T Dipole Demonstrator

Journal Article · 14 April 2018 · IEEE Transactions on Applied Superconductivity

DOI: https://doi.org/10.1109/TASC.2018.2806399 · OSTI ID:1617234

Kokkinos, Charilaos  ^[1]; Apostolidis, I. ^[1]; Carmichael, Justin ^[2]; Gortsas, Theodore ^[3]; Kokkinos, Sotiris ^[1]; Loukas, Konstantinos ^[1]; Novitski, Igor ^[2]; Polyzos, Demosthenes ^[3]; Rodopoulos, Dimitris ^[3]; Schoerling, Daniel  ^[4]; Tommasini, Davide  ^[4]; Zlobin, Alexander V.  ^[2]

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1. FEAC Engineering P.C., Patras (Greece)
2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
3. Univ. of Patras, Rio Achaia (Greece)
4. European Organization for Nuclear Research (CERN), Geneva (Switzerland)

Nb$$_{3}$$Sn magnets with a nominal operation field of ~15 T are being considered for the large hadron collider (LHC) energy upgrade high-energy large hadron collider (HE-LHC) and a post-LHC future circular collider. To demonstrate the feasibility of 15-T accelerator quality dipole magnets, the U.S. magnet development program is developing a single-aperture 15-T Nb$$_{3}$$Sn dipole demonstrator based on a 4-layer graded cos-theta coil with 60 mm aperture and cold iron yoke. The main design challenges for 15-T accelerator magnets include large Lorentz forces at this field level. To counteract them, an innovative mechanical structure based on a vertically split iron yoke, locked by large aluminum IC-clamps and supported by a thick stainless steel skin, has been developed at Fermilab. To study the performance of the structure, a parametric multiphysics finite element analysis (FEA) model has been set up. This paper describes the numerical model as well as the results of a sensitivity analysis of the effect of geometrical tolerances and assembly parameters.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Grant/Contract Number: AC02-07CH11359
• OSTI ID: 1617234
• Report Number(s): FERMILAB-CONF--18-781-TD; oai:inspirehep.net:1664487
• Journal Information: IEEE Transactions on Applied Superconductivity, Journal Name: IEEE Transactions on Applied Superconductivity Journal Issue: 3 Vol. 28; ISSN 1051-8223
• Publisher: Institute of Electrical and Electronics Engineers (IEEE)Copyright Statement
• Country of Publication: United States
• Language: English