Towards 20 T Hybrid Accelerator Dipole Magnets

Ferracin, P.; Ambrosio, G.; Arbelaez, D.; Brouwer, L.; Barzi, E.; Cooley, L.; Garcia Fajardo, L.; Gupta, R.; Juchno, M.; Kashikhin, V.; Marinozzi, V.; Novitski, I.; Rochepault, E.; Stern, J.; Zlobin, A.; Zucchi, N.

doi:10.1109/tasc.2022.3152715

Towards 20 T Hybrid Accelerator Dipole Magnets

Journal Article · Tue Feb 22 00:00:00 EST 2022 · IEEE Transactions on Applied Superconductivity

DOI:https://doi.org/10.1109/tasc.2022.3152715· OSTI ID:1864229

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Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
National High Magnetic Laboratory, Tallahassee, FL (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Université Paris-Saclay, Paris (France)
Tufts Univ., Medford, MA (United States)

We report the most effective way to achieve very high collision energies in a circular particle accelerator is to maximize the field strength of the main bending dipoles. In dipole magnets using Nb-Ti superconductor the practical field limit is considered to be 8-9 T. When Nb₃Sn superconductor material is utilized, a field level of 15-16 T can be achieved. To further push the magnetic field beyond the Nb₃Sn limits, High Temperature Superconductors (HTS) need to be considered in the magnet design. The most promising HTS materials for particle accelerator magnets are Bi2212 and REBCO. However, their outstanding performance comes with a significantly higher cost. Therefore, an economically viable option towards 20 T dipole magnets could consist in an “hybrid” solution, where both HTS and Nb3Sn materials are used. We discuss in this paper preliminary conceptual designs of various 20 T hybrid magnet concepts. After the definition of the overall design criteria, the coil dimensions and parameters are investigated with finite element models based on simple sector coils. Preliminary 2D cross-section computation results are then presented and three main layouts compared: cos-theta, block, and common-coil. Both traditional designs and more advanced stress-management options are considered.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: US Magnet Development Program; USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-05CH11231; AC02-07CH11359

OSTI ID:: 1864229

Alternate ID(s):: OSTI ID: 1924653

Report Number(s):: FERMILAB-PUB-22-221-TD; FRI-OR6-101-04; oai:inspirehep.net:2059978

Journal Information:: IEEE Transactions on Applied Superconductivity, Journal Name: IEEE Transactions on Applied Superconductivity Journal Issue: 6 Vol. 32; ISSN 1051-8223

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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