High-temperature superconducting tape optimized to high-field and to AC-based applications

Nov. 29 18:40-18:55

*Cornelia Hintze1, Pedro Francisco Gil1, Fedor Gömöry2, Anders Wulff3, Werner Prusseit1
THEVA Dünnschichttechnik GmbH1
Institute of Electrical Engineering, Slovak Academy of Sciences2

As the technological readiness of high-temperature superconductors (HTS) coated conductor (CC) tapes is reaching high levels and they become available to more and more applications, THEVA presents recent advances in tape performance. In order to increase the applicability in high field magnets, artificial pinning centres are introduced in the superconducting layer of CC tapes. The latest high-field critical current (IC) measurements confirm the stabilization of the superconducting state up to extremely high magnetic fields. For some AC applications, the limiting factor is increasingly the AC losses due to induced screening currents in the tape. Therefore, we also present recent progress on reducing tape width while increasing mechanical and electrical stabilization. For highly loss-sensitive applications, even smaller tape widths are required. To maintain mechanical stability and integrity, this is only possible by using filamentized HTS tapes, which are being studied within the Filaments4Fusion project. We are comparing two different filamentization techniques and discuss the possibilities of optimization.

Keywords: high-temperature superconductor, coated conductor, artificial pinning, AC loss