Development of persistent joints for superconducting Bi-2212 coils

Zagura, Petr and Kim, Ingon and Follows, Frederick and Barker, Clara and Melhem, Ziad and Twin, Andrew and Ball, Steven and Grovenor, Chris and Speller, Susannah and Mousavi, Tayebeh (2024) Development of persistent joints for superconducting Bi-2212 coils. Superconductor Science and Technology, 37 (5). ISSN 0953-2048

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Abstract

Bi2Sr2CaCu2O8+x (Bi-2212) multifilamentary wire is the only high-temperature superconductor manufactured in the form of an isotropic round wire, and so offers a number of advantages for the designers of high field magnets. However, for high-field (>25 T), high-stability magnet applications, ultra-low resistance superconducting joints (R < 10−12 Ω) will be needed to take advantage of the excellent properties of the Bi-2212 wire. This study focuses on the fabrication of compact melt processed joints in small coils of Bi-2212/Ag multifilamentary round wires and the testing of their superconducting performance by inductive resistance measurements. Microstructural analysis is carried out to correlate the microstructure to the superconducting performance of the joints. Our optimized technique led to a reliable process for the preparation of small coils with melt processed joints that occupy very small volumes but can still carry the highest persistent currents reported so far for Bi-2212.

Item Type:
Journal Article
Journal or Publication Title:
Superconductor Science and Technology
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2500/2505
Subjects:
?? microstructuremagnet designapplied superconductivitymaterials chemistrymetals and alloysceramics and compositeselectrical and electronic engineeringcondensed matter physics ??
ID Code:
217914
Deposited By:
Deposited On:
12 Apr 2024 15:55
Refereed?:
Yes
Published?:
Published
Last Modified:
16 Jul 2024 01:07