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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Tachikawa, K. |
| Copyright Year | 2002 |
| Abstract | The bronze-processed (Nb,Ti)/sub 3/Sn conductors achieved an improvement in high-field performance by increasing Sn concentration in the matrix. A new process using Ta-Sn core produces thick (Nb,Ta)/sub 3/Sn layers and a non-Cu J/sub c/ of 1.2/spl times/10/sup 4/ A/cm/sup 2/ at 23 T and 4.2 K in resulting (Nb,Ta)/sub 3/Sn conductors. The production technologies of jelly roll-processed Nb/sub 3/Al conductors with large J/sub c/ at 12 T have been established. The continuous quenching and subsequent phase transformation provides Nb/sub 3/Al conductors with excellent high-field properties. Ultra-thin filamentary Nb-Ti and Nb/sub 3/Sn conductors for AC use made substantial progress in their performance. A Bi-2212 insert coil stably generated an incremental 3 T in a back up field of 18 T. The PAIR process produces an appreciable increase in the J/sub c/ of the Bi-2212 tape. The ROSAT Bi-2212 round wire with tape-shaped filaments and triple rotation symmetry shows almost no anisotropy in J/sub c/. The J/sub c/ of long-length Bi-2223 tape remains 23/spl times/10/sup 4//cm/sup 2/ at 77 K. The mechanical strength of the Bi-2223 tape has been improved by a factor of /spl sim/3 without degrading its J/sub c/. Test power transmission cables and 20 K-operated large-bore magnet are being developed by Bi-2223 tapes. Biaxially aligned Y-123 tapes are being fabricated through different routes. A few meter-long IBAD-processed Y-123 tape keeps a promising J/sub c/ at 77 K. Meanwhile, a Sm-123 disc with Ag/sub 2/O addition traps a field exceeding 2 T at 77 K. |
| Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
| Starting Page | 959 |
| Ending Page | 964 |
| Page Count | 6 |
| File Size | 623364 |
| File Format | |
| ISSN | 10518223 |
| Volume Number | 10 |
| Issue Number | 1 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2000-03-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Superconductivity Tin Conductors Niobium Production Coils Wire Anisotropic magnetoresistance Degradation Testing |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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