The effect of stabilizer on the trapped field of stacks of superconducting tape magnetized by a pulsed field
Superconductor Science and Technology
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Page, A., Patel, A., Baskys, A., Hopkins, S., Kalitka, V., Molodyk, A., & Glowacki, B. (2015). The effect of stabilizer on the trapped field of stacks of superconducting tape magnetized by a pulsed field. Superconductor Science and Technology, 28 (085009)https://doi.org/10.1088/0953-2048/28/8/085009
Stacks of high temperature superconducting tape, magnetized using pulsed fields, provide a new type of permanent magnet using superconductors. To optimise the trapped field in such stacks, the role of stabilization layers was investigated by pulse magnetizing a 12 mm square stack of 15 tape layers over a temperature range of 15 – 77 K. The stacks consisted of commercial tape with a silver stabilizer of 1 – 3 µm or tape with an additional 20 µm layer of copper on top of 1 µm of silver. It was found that the trapped field and flux are relatively insensitive to the stabilizer thickness, and 1 µm of silver only, led to the highest trapped field. An FEM model was also developed for a stack that considered for the first time both the actual thickness of metallic and superconducting layers, to investigate the effect of heating and heat transfer when a stack of tapes is magnetized.
The authors would like to acknowledge the financial support of SKF S2M, the magnetic bearing division of SKF, The Isaac Newton Trust, Cambridge and EPSRC.
External DOI: https://doi.org/10.1088/0953-2048/28/8/085009
This record's URL: https://www.repository.cam.ac.uk/handle/1810/248612