Verification tests of a 66 kV HTSC cable system for practical use (first cooling tests)

Superconducting Materials — A Topical Overview

“…However, the upper field limit of ~ 1 T at 77 K due to the pancake vortex disintegration of magnetic flux lines (see Fig. 7) [327] restricts the LN 2 operation of Bi-2223 tapes to low-field applications such as cables [328,329] or transformers. For extremely high magnetic field applications at low temperature operation, Bi-2212 conductors are economically more attractive than Bi-2223 tapes due to simpler processing and thus lower fabrication cost [330].…”

Analysis of shielding property in Bi-2223/Ag multifilamentary tapes with multi-layer arrangement

“…Especially, the silver sheathed Bi 2−x Pb x Sr 2 Ca 2 Cu 3 O y (hereafter stated as Bi-2223/Ag) multifilamentary tapes with powder-in-tube (PIT) technique are one of the most promising candidates for the long-length and high-quality HTS tape conductors. Then, various kinds of HTS power application systems such as HTS cable [1], HTS motor/generator [2] and HTS transformer [3] have been developed and studied with the use of Bi-2223/Ag tape conductors.…”

“…Among the HTS power application systems, a 100 m length HTS cable system with the specifications of 66 kV/1 kA/114 MVA has been developed and successfully tested in Japan [1]. In such cable system, there is a unique structure that not only the conducting layer but also the magnetic shield is composed of Bi-2223/Ag tape conductors.…”

Superconducting fiber

“…The holes in random and ordered hole fibers allow for cryogenic cooling with liquid nitrogen and/or helium. [21][22][23] The supporting methodologies, such as splicing and cable designs, in place for optical fibers can also be readily adapted to superconductor core fiber designs. Furthermore, the integration of superconductivity and optical waveguides has been of large interest for ultrasensitive, ultra-fast, and ultralow noise light detectors, but to date has only been evaluated experimentally.…”