MT27, 27th International Conference on Magnet Technology

Development of superconducting joints between bronze-route Nb3Sn multifilamentary wires for persistent-mode operation

THU-PO3-404-06

18 Nov 2021, 10:00

2h

Fukuoka Convention Center

Poster THU-PO3-404 Magnets for MRI

Speakers

Mr Peng Gao (Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China)Mr haihong Liu (中国科学院合肥物理研究所)

Description

Abstract: Superconducting joints are essential for persistent-mode operation in a superconducting magnet system, the resistance has to be around 10-14-10-12 Ω thus to produce an ultra-stable magnetic field. Based on the national collaboration program of the MRI for small animals, the development of superconducting joints between bronze-route Nb3Sn multifilamentary wires manufactured by Furukawa is launched. In this paper, we report the rational design of the Nb3Sn superconducting joints in detail. To qualify the properties of the Nb3Sn superconducting joints, their critical current and resistance are examined through four-lead and current decay methods, respectively, at 4.2 K in a background magnetic field. The investigation aim to provide a feasible approach of Nb3Sn superconducting joints for the small animal MRI magnet systems.