A superconducting joint for GdBa2Cu3O7 (-delta)-coated conductors
- Authors
- Park, Yeonjoo; Lee, Myungwhon; Ann, Heesung; Choi, Yoon Hyuck; Lee, Haigun
- Issue Date
- 5월-2014
- Publisher
- NATURE PUBLISHING GROUP
- Keywords
- closed-loop GdBCO model coil; GdBCO-coated conductor; persistent current mode operation; second-generation high-temperature superconducting magnet application; superconducting joint
- Citation
- NPG ASIA MATERIALS, v.6
- Indexed
- SCIE
SCOPUS
- Journal Title
- NPG ASIA MATERIALS
- Volume
- 6
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/98717
- DOI
- 10.1038/am.2014.18
- ISSN
- 1884-4049
- Abstract
- Second-generation (2G) GdBCO-coated conductors (CCs) are promising for superconducting magnet applications because of their high critical current (I-c) density, low dependency of the Ic on the external magnetic field, good mechanical properties and reasonable cost, which offer opportunities to develop ultra-high-field magnets. However, they have not been used in hightemperature superconducting (HTS) applications with persistent current mode (PCM) operation such as nuclear magnetic resonance/magnetic resonance imaging magnets owing to unavailability of fabrication techniques for proper joining and contacts. Here we report a resistance-free joint, termed a 'superconducting joint', for 2G GdBCO CCs that forms a direct connection to establish a superconducting closed loop for PCM operation. The Ic value of the joined CCs is identical to that of the parent conductors in a liquid nitrogen bath (77 K). Moreover, the initially induced magnetic field of a model GdBCO coil containing a superconducting joint is maintained without decreasing, indicating the complete absence of electrical resistance. Thus, this fabrication method is a unique practical solution for lengthening the 2G HTS CCs and, more importantly, achieving PCM operation in 2G HTS magnet applications, including ultra-high-field nuclear magnetic resonance/magnetic resonance imaging magnets generating more than 1 GHz.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.