After the First International Industrial Symposium on the Super Collider, the following developmental work on NbTi superconducting Rutherford cable for the Superconducting Super Collider (SSC) was done at Furukawa Electric. (1) Improvement in the critical current density of the SSC wire, based on volume production: The manufacturing process enabling us to achieve the critical current density of more than 3,000 A/mm2 at 5 T is being established. (2) Development of large keystone angled cable to be used for modified SSC dipole magnets: Critical current degradation due to cabling is nearly proportional to cross-sectional area reduction of strands. A 5-cm bore, 1-m long dipole magnet having no wedge inside the coils was fabricated by using the large keystone angled cable and successfully tested by KEK. (3) Magnetization measurements on the SSC wire samples: The long term magnetization decay imposing a serious problem in the accelerator design is possibly associated with flux creep phenomenon occurring in a proximity-coupled matrix between NbTi filaments.
KeywordsTotal Heat Boulder Isobe Keystone
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- 1.M. Ikeda, “Development of SSC cable in Furukawa,” Supercollider 1, 243 (Plenum Publishing Corporation, 1989 )Google Scholar
- 2.H. Ii, Y. Nagasu, M. Ikeda, T. Shintomi and H. Hirabayashi, “Trial-fabrication of superconducting Rutherford type cable having large keystone angle,” 11th International Conference on Magnet Technology, MA-01 (Tsukuba, 1989 )Google Scholar
- 3.T. Shintomi, A. Terashima, H. Hirabyashi, M. Ikeda and H. Ii, “Development of large keystone angle cable for dipole magnet with ideal arch structure,” International Cryogenic Materials Conference, HX-08 (Los Angeles, 1989 )Google Scholar
- 4.T. Shintomi, A. Terashima and H. Hirabayashi, “Development of superconducting dipole magnet with ideal arch structure using large keystone angle cable,” 11th International Conference on Magnet Technology, JG-03 (Tsukuba,1989)Google Scholar
- 5.R. B. Goldfarb and R. L. Spomer, “Magnetic characteristics and measurements of Nb-Ti wire for the Superconducting Super Collider,” International Cryogenic Materials Conference, FX-02 (Los Angeles, 1989 )Google Scholar
- 6.K. Matsumoto and Y. Tanaka, “High critical current density in multifilamentary NbTi superconducting wires,” 6th US-Japan Workshop on High Field Superconductors (Boulder, 1989 )Google Scholar