Design, fabrication and performance of a 1.29 T Bi-2223 magnet

Sneary, AB; Friend, CM; Hampshire, DP

Abstract

The design and fabrication procedure of a laboratory-scale Bi-2223 tape superconducting magnet with a bore of 40 mm and a maximum field of 1.29 T at 4.2 K is presented. The magnet comprises six resin impregnated double-wound pancakes of bore diameter 40 nim fabricated via the react-and-wind route. Critical current density (J(c)) measurements have been made as a function of magnetic field, angle and strain at 4.2 K and 77 K on short samples. In zero field, the critical current density for the superconducting cross-sectional area of the tape was 8.3 x 10(4) A cm(-2) (4.2 K) and 1.18 x 10(4) A cm(-2) (77 K). The electric field-current density characteristics of all the components of the coils when individually energized or with the whole magnet energized have been measured. Comparison between short sample measurements and performance of the magnet show that minimal additional damage occurred beyond the similar to 20% that was produced by the bending strain during the wind-and-react fabrication procedure and the similar to 10% variation of the long length J(c) of the tape. Sufficient detail is provided for the non-specialist to assess both the use of potential brittle superconducting tapes for magnet technology and to construct a laboratory-scale magnet.

Citation

Sneary, A., Friend, C., & Hampshire, D. (2001). Design, fabrication and performance of a 1.29 T Bi-2223 magnet. Superconductor Science and Technology, 14(7), 433-443. https://doi.org/10.1088/0953-2048/14/7/303

• Journal Article Type: Article
• Publication Date: 2001-07
• Journal: Superconductor Science and Technology
• Print ISSN: 0953-2048
• Electronic ISSN: 1361-6668
• Publisher: IOP Publishing
• Volume: 14
• Issue: 7
• Pages: 433-443
• DOI: https://doi.org/10.1088/0953-2048/14/7/303
• Keywords: CRITICAL-CURRENT DENSITY; SUPERCONDUCTING TAPES; (BI,PB)(2)SR2CA2CU3OXTAPES; MULTIFILAMENTARY TAPES; BI2SR2CA2CU3OX TAPES; INSULATIONCOATINGS; ANGULAR-DEPENDENCE; BI(2223)/AG TAPES; SHEATHED TAPES; 4.2 K
• Public URL: https://durham-repository.worktribe.com/output/1557633