Development of Multifilamentary NbTi and Nb_3Sn Composite Conductors for AC Use(Low-T_c Superconducting Materials Research)

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概要

• 論文の詳細を見る

• A NbTi multifilamentary composite conductor with about 10, 000 filaments has been manufactured in long length. A.c. losses were greatly reduced by the use of a fine filament size of 0.52μm, a tight twist of 1.13 mm and a small wire diameter of 0.11 mm with a Cu-Ni matrix. The hysteresis loss and the coupling loss are 73 kW/m^3 and 56 kW/m^3 for a 50 Hz magnetic field with an amplitude of 1.5 T. A triplex conductor was constructed by cabling three strands, and several small coils were wound from this cable. One of coils generated a maximum field of 1.52 T (center) at 50 Hz and 50 Hz losses of the coil was 130 kW/m^3. The quenching current for 50 Hz operation is the same as the static critical current. A Nb_3Sn composite conductor with about 10, 000 submicron filaments has been manufactured by the external diffusion process. In 50 Hz field with an amplitude of 2.0 T, the hysteresis loss and the coupling loss were to be 465 kW/m^3 and 26 W/m^3. A small coil was wound from the three-strand cable. In 50 Hz operation, the coil generated a field of 1.8 T at the d.c. critical current and the observed a.c. losses were 450 kW/m^3.

• 東北大学の論文

著者

• Ogasawara T

  National Aerospace Lab.of Japan Tokyo Jpn

• Yasohama K.

  College of Science and Technology of Nihon University

• Kubota Y.

  College of Science and Technology of Nihon University

• Ogasawara T.

  College of Science and Technology of Nihon University

関連論文

• Development of Multifilamentary NbTi and Nb_3Sn Composite Conductors for AC Use(Low-T_c Superconducting Materials Research)

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