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Fabrication of {\rm Gd}_{1}{\rm Ba}_{2}{\rm Cu}_{3}{\rm O}_{\rm x} Coated Conductors for HTS Cables

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4 Author(s)
Abiru, K. ; Adv. Supercond. Dept., Sumitomo Electr. Ind., Ltd., Osaka, Japan ; Shingai, Y. ; Konishi, M. ; Ohmatsu, K.

We have been fabricating Gd1Ba2Cu3Ox (GdBCO) coated conductors (CCs) on textured clad-type substrates by using pulsed laser deposition (PLD) method for high temperature superconducting (HTS) power cables. In this project, numerous numbers of CCs are required for fabricating a 66 kV class, 3-in-One HTS cable and for the evaluation of its properties. In order to achieve this, it is important to ensure the stable production and the high-throughput manufacturing. In this work, we have newly installed a high power laser of 300 W for the PLD equipment, which has 1.66 times higher power than the previous one. As a result, the stability of manufacturing and the production rate were greatly improved. In addition, we have adopted a wide tape approach using 30 mm width substrates to increase the throughput. Moreover, we have optimized deposition condition for a seed layer by electron beam (EB) evaporation method, then the maximum Ic value for a short sample has achieved 497 A/cm at 77 K in the self-field. With this improved process, long GdBCO tapes with high Ic have been successfully fabricated.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:21 ,  Issue: 3 )

Date of Publication:

June 2011

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