Recent Progress of the Series-Connected Hybrid Magnet Projects

• Published in: IEEE transactions on applied superconductivity Vol. 20; no. 3; pp. 692 - 695
• Main Authors: Painter, Thomas A, Adkins, Todd, Hongyu Bai, Bird, Mark D, Bole, Scott, Cantrell, Kurt, Jingping Chen, Dixon, Iain R, Ehmler, Hartmut, Gavrilin, Andy, Ke Han, Jun Lu, Smeibidl, Peter, Walsh, Robert, Weijers, Huub W, Ting Xu, Yuhu Zhai
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.2010; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; ASPECT RATIO; CICC; Coiling; Coils (windings); CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Conductors; Conductors (devices); CRYOSTATS; DESIGN; Electric connection. Cables. Wiring; Electric wire; Electrical engineering. Electrical power engineering; Electromagnets; Electronics; Exact sciences and technology; FABRICATION; Inhomogeneity; Inserts; Joining processes; Laboratories; MAGNETIC FIELDS; MAGNETS; Materials; NEUTRON SOURCES; Neutrons; Nonuniform electric fields; PROCESSING; PRODUCTION; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; series-connected hybrid; Superconducting cables; Superconducting coils; Superconducting devices; Superconducting filaments and wires; Superconducting magnets; SUPERCONDUCTING WIRES; Superconductivity; Various equipment and components; Series connection; Magnet; Imager; Charge injection device; Aspect ratio; series-connected hybrid; Superconducting wires; Superconducting coils; Prototype tests; Neutron source; Pipe cable; High field; Cryostat; CICC; Electrical conductor; Magnetic field; Machine windings
• DOI: 10.1109/TASC.2010.2041757
• ISSN: 1051-8223

The National High Magnetic Field Laboratory (NHMFL) in Tallahassee, Florida has designed and is now constructing two Series Connected Hybrid (SCH) magnets, each connecting a superconducting outsert coil and a resistive Florida Bitter insert coil electrically in series. The SCH to be installed at the NHMFL will produce 36 T and provide 1 ppm maximum field inhomogeneity over a 1 cm diameter spherical volume. The SCH to be installed at the Helmholtz Center Berlin (HZB) in combination with a neutron source will produce 25 T to 30 T depending on the resistive insert. The two magnets have a common design for their cable-in-conduit conductor (CICC) and superconducting outsert coils. The CICC outsert coil winding packs have an inner diameter of 0.6 m and contribute 13.1 T to the central field using three grades of CICC conductors. Each conductor grade carries 20 kA and employs the same type of Nb 3 Sn superconducting wire, but each grade contains different quantities of superconducting wires, different cabling patterns and different aspect ratios. The cryostats and resistive insert coils for the two magnets are different. This paper discusses the progress in CIC conductor and coil fabrication over the last year including specification, qualification and production activities for wire, cable, conductor and coil processing.