Numerical Simulation of High-Temperature Superconducting Stacked-Tape Magnetic Lens via H-ϕ Model
Accepted version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
Abstract
Magnetic lens, exploiting the induced screening current, may concentrate the spatial magnetic flux. This concept has been realized by several research groups using GdBCO and/or MgB₂ bulk superconductors. The limitation of the magnitude of concentrated flux density lies on the mechanical brittleness of the materials and the flux instability. High-temperature superconducting (HTS) tape possesses excellent mechanical and flux pinning properties and hence is a good candidate for magnetic lens. In this study, we implemented numerical simulations on the design of magnetic lenses using HTS stacked tapes. The models were constructed based on H-ϕ formulations. We investigated and compared the concentration effect of various magnetic lenses with different topologies. The results show that a central field of 22.69 T and 25.62 T can be achieved respectively with rectangular-shaped stacks and X-shaped stacks in an applied magnetic field of 20 T. An optimized design of the magnetic lens has been proposed and correspondingly the mechanism for a better concentration-effect has been explained which provides a good reference for future experiments and applications.
Description
Keywords
Journal Title
Conference Name
Journal ISSN
1558-2515