Journal
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
Volume 33, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6668/ab7c52
Keywords
high-field magnets; screening currents; REBCO; strain distribution
Categories
Funding
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB25000000]
- National Natural Science Foundation of China [U1632276]
Ask authors/readers for more resources
The shielding (or screening current) effect in high-T-c coated conductors has a strong influence on its stress/strain distribution in a coil winding, especially during high-field operations. To demonstrate this phenomenon, a special experimental setup was designed. With an LTS background magnet and a small HTS insert coil, we were able to carry out direct observations on the hoop strains of a 10 mm wide REBCO sample. Measured data was compared with numerical solutions obtained from models based on T-A formulation and elastic models, showing good agreement. An analytical expression was proposed to estimate the maximum radial Lorentz force considering the screening current effect. Using the developed numerical models, we further studied two methods that are utilized for reducing the screening-current-induced magnetic field, i.e. use of multi-filamentary conductors and current sweep reversal approach.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available