Magnetic properties of superconducting multifilamentary tapes in perpendicular field. I: Model and vertical stacks

TL;DR

This paper models the magnetic behavior, including current profiles, magnetization, and AC losses, of vertically stacked superconducting tapes in a perpendicular magnetic field, considering finite thickness and demagnetizing effects.

Contribution

It introduces a general critical state model for vertically stacked superconducting tapes, accounting for finite thickness and magnetic coupling effects.

Findings

Finite thickness affects magnetic response.

Magnetic coupling influences AC losses.

Model applicable to symmetric tape arrangements.

Abstract

Current and field profiles, and magnetization and AC losses are calculated for an array of infinitely long superconducting tapes arranged vertically in a perpendicularly applied magnetic field. Calculations are based on the critical state model. The finite thickness of the tapes and the effects of demagnetizing fields are considered. The influence of the magnetic coupling of the filaments in the magnetic properties of the arrays are studied. The general model can be applied to an arbitrary arrangement of tapes as long as there is reflection symmetry with respect to the vertical central plane.