Upgrading Design to a 25 T Cryogen-Free Superconducting Magnet Based on Low Temperature and High Magnetic Field Properties of the Practical CVD Processed Coated Conductors

We evaluated critical current density and mechanical properties of the Y123 coated conductor (CC) tapes on buffered Hastelloy substrates prepared by the chemical vapor deposition method in high magnetic fields and low temperatures. The J c values of the tape are about 1.1 MA/cm at 77.3 K, 0 T and 1....

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2010-06, Vol.20 (3), p.592-595
Main Authors: Awaji, Satoshi, Ishihara, Ryosuke, Namba, Masafumi, Nishijima, Gen, Oguro, Hidetoshi, Watanabe, Kazuo, Shikimachi, Koji, Hirano, Naoki, Nagaya, Shigeo
Format: Article
Language:English
Subjects:
Applied sciences
Chemical vapor deposition
Coated conductor
Coiling
Conductors
critical current
Critical current density
cryogen-free superconducting magnet
Electric connection. Cables. Wiring
Electrical engineering. Electrical power engineering
Electromagnets
Electronics
Exact sciences and technology
high field
Magnetic fields
Magnetic properties
Magnetism
Mechanical factors
Microelectronic fabrication (materials and surfaces technology)
Nickel base alloys
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Stress
Studies
Superalloys
Superconducting coils
Superconducting magnets
Superconducting tapes
Superconductivity
Temperature
Upgrading
Various equipment and components
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Summary:We evaluated critical current density and mechanical properties of the Y123 coated conductor (CC) tapes on buffered Hastelloy substrates prepared by the chemical vapor deposition method in high magnetic fields and low temperatures. The J c values of the tape are about 1.1 MA/cm at 77.3 K, 0 T and 1.8 MA/cm 2 at 4.2 K and 17 T for B//c. In addition, the hoop stress test of the single layer coil shows that the stress limit of the CVD-Y123 CC tapes on Hastelloy is over 1 GPa. On the basis of those experimental data, we designed the innermost high temperature superconducting insert coil for upgrading of the 18 T cryogen-free superconducting magnet (18 T-CSM) under the condition of the stress limit of 600 MPa. The coil, which consists of the 22 double pancake coils can generate 9.4 T with the operation current of 295 A in the backup field of 15.6 T. In this case, the central field of the 18 T-CSM can be improved up to 25 T from 18.1 T.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2010.2041755