Generation of magnetic fields over 21 T in a 61 mm clear bore using low copper ratio (Nb,Ti){sub 3}Sn conductors
Journal Article
·
· IEEE Transactions on Magnetics
- National Research Inst. for Metals, Tsukuba, Ibaraki (Japan). Tsukuba Magnet Labs.
A 21 T superconducting magnet system has been developed and improved at the National Research Institute for Metals in Japan. As the steady progress of high-Tc superconducting coils required a larger bore for testing their performance, a new innermost coil has been developed. The authors increased the available bore from 50 mm to 61 mm. The new coil employed three kinds of rectangular (Nb,Ti){sub 3}Sn conductors. External copper stabilized these conductors, with a Cu:SC ratio of only 0.25. The new coil operated in a 160 mm diameter clear bore with a background field of 18 T in saturated superfluid helium, generating a central field of 21.5 T without any training behavior. A double walled dewar, the outer diameter of which was 60 mm, was also developed. With this dewar, the new system provides a temperature-variable bore of 50 mm.
- OSTI ID:
- 287673
- Report Number(s):
- CONF-950691--
- Journal Information:
- IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 4Pt1 Vol. 32; ISSN IEMGAQ; ISSN 0018-9464
- Country of Publication:
- United States
- Language:
- English
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