| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Research Abstract |
We analytically and experimentally evaluated the current distributions in a toroidal coil composed of the series connected double pancake coils composed of a stacked conductor with parallel-connected multiple YBCO tapes and a toroidal coil composed of the parallel-connected multiple double pancake coils composed of single YBCO tape conductor connected in series. Based on these results, we investigated the cause of non-uniform current distribution in the toroidal coils and the desigin guideline for an YBCO toroidal coil with large current capacity. Due to quite small distance between the tapes, the non-uniform current distribution in the stacked conductor is easily occurred by the difference of the self-inductance in each tape due to a manufacturing error of tape thickness. Therefore, the parallel-connected multiple double pancake coils composed of single tape conductor is effective for preventing the non-uniform current distribution.
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