The NHMFL Hybrid Magnet Projects

The National High Magnetic Field Laboratory is developing resistive-superconducting hybrid magnets both for internal use and for installation at other facilities. The Tallahassee magnet will have a vertical bore and provide 36 T in a 40-mm bore with 1-ppm homogeneity over a 10-mm diameter spherical...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2009-06, Vol.19 (3), p.1612-1616
Main Authors: Bird, M.D., Hongyu Bai, Bole, S., Jingping Chen, Dixon, I.R., Ehmler, H., Gavrilin, A.V., Painter, T.A., Smeibidl, P., Toth, J., Weijers, H., Ting Xu, Zhai, Y.
Format: Article
Language:English
Subjects:
Applied sciences
Boring
Cable-in-conduit
Critical current
Design engineering
Design. Technologies. Operation analysis. Testing
Electric connection. Cables. Wiring
Electrical engineering. Electrical power engineering
Electromagnets
Electronics
Exact sciences and technology
Homogeneity
hybrid magnet
Inserts
Integrated circuits
Laboratories
Magnetic fields
Mathematical models
Nb3Sn
Niobium
Numerical models
Refrigeration
Ridges
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Superconducting coils
superconducting magnet
Superconducting magnets
Superconductivity
System testing
Tin
Various equipment and components
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Summary:The National High Magnetic Field Laboratory is developing resistive-superconducting hybrid magnets both for internal use and for installation at other facilities. The Tallahassee magnet will have a vertical bore and provide 36 T in a 40-mm bore with 1-ppm homogeneity over a 10-mm diameter spherical volume. The Berlin version will provide a horizontal field of 25 T in a converging-diverging bore configuration suitable for neutron-scattering experiments. A design study is underway for a third magnet for Oak Ridge that will be similar to the Berlin version but provide >30 T. The three magnets will use very similar ~ 13 T Nb 3 Sn CICC coils for the superconducting outserts. The resistive insert magnets will be different configurations operating at different power levels. In designing the magnet systems we have developed a new numerical model to predict the critical current of Nb 3 Sn CICC's, tested several conductors in-house and abroad, designed cryostats and refrigeration systems, and developed new resistive magnet technology. An overview of the innovations and present status is presented.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2009.2018269