August 27, 2017 to September 1, 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Performance of two-ply four-filaments Gd123 tape coil

Aug 31, 2017, 12:15 PM


Regular 15 minutes Oral Presentation C3 - HTS Insert and Model Magnets Thu-Mo-Or31


Prof. Satoshi Awaji (HFLSM, IMR, Tohoku University)


We have succeeded in the development of the 25T cryogen-free superconducting magnet recently [1]. As a next step, a development of 30 T class superconducting magnet is planned. In order to realize high field superconducting magnets beyond 30 T, the reliability of REBa2Cu3Oy (RE123, RE: Y and rare earth) conductors should be improved. For this purpose, we made single pancake coils by co-winding two-ply (two-stacked) RE123 tapes as an R&D study. The tape used in this study is a four-filaments Gd123 tape, whose Gd123 layer was divided by a scratch on the IBAD-MgO layer [2]. Two of the four-filaments Gd123 tapes were wound together with a polyimide tape insulation, so that the Gd123 sides of two tapes are face-to-face without the insulation. Finally, the Gd123 single pancake coil was impregnated by epoxy. The inner and the outer diameters of the Gd123 single pancake coil are 50 mm and 92.5 mm, respectively. The critical currents and n-values of the two-ply Gd123 tape coil at 77.3 K are 206.9 A and 15.2 for the inside-winding and 207.6 A and 15.0 for the outside-winding. The detailed coil performance will be presented and be compared to the two-ply mono-filament Gd123 coil.
[1] S. Awaji et al., Supercond. Sci. Technol. submitted. [2] S. Fujita et al., IEEE TAS 27 (2017) 6600504.

Submitters Country Japan

Primary author

Prof. Satoshi Awaji (HFLSM, IMR, Tohoku University)


Dr Tatsunori Okada (HFLSM, IMR, Tohoku University) Kohki Takahashi (HFLSM, IMR, Tohoku University) Dr Hiroshi Miyazaki (Toshiba Corporation) Sadanori Iwai (Toshiba Corporation) Dr Shigeru Ioka (Toshiba Corporation) Dr Yasuhiro Iijima (Fujikura Ltd.) Masanori Daibo (Fujikura Ltd.)

Presentation materials