Towards 20 T Hybrid Accelerator Dipole Magnets

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 Nb 3 Sn superconductor material is u...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity Vol. 32; no. 6; pp. 1 - 6
Main Authors: 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.
Format: Journal Article
Language:English
Published: New York IEEE 01.09.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Institute of Electrical and Electronics Engineers
Subjects:
Bend strength
Bismuth strontium calcium copper oxide
Cable insulation
Coils
Design criteria
Dipole magnets
Dipoles
Field strength
Finite element method
High temperature superconductors
HTS
hybrid magnets
Magnetomechanical effects
Magnets
Nb<named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX"> _3</tex-math> </inline-formula> </named-content>Sn magnets
Niobium-tin
Particle accelerators
Stress
Superconducting magnets
Two dimensional models
Wires
ISSN:1051-8223, 1558-2515
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Summary: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 Nb 3 Sn superconductor material is utilized, a field level of 15-16 T can be achieved. To further push the magnetic field beyond the Nb 3 Sn 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 Nb 3 Sn 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.
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USDOE Office of Science (SC), High Energy Physics (HEP)
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2022.3152715