Alternating current loss in radially arranged superconducting strips

TL;DR

This paper derives analytic formulas for ac loss in radially arranged superconducting strips, analyzing how configuration and current direction affect hysteretic loss, with implications for optimizing superconducting device performance.

Contribution

It introduces a novel analytic method to calculate ac loss in radial superconducting strips considering different current directions and configurations.

Findings

Ac loss depends on strip configuration and number.

Bidirectional currents cause different ac loss behavior than unidirectional.

Analytic expressions enable better understanding of hysteretic loss in superconducting strips.

Abstract

Analytic expressions for alternating current (ac) loss in radially arranged superconducting strips are presented. We adopt the weight-function approach to obtain the field distributions in the critical state model, and we have developed an analytic method to calculate hysteretic ac loss in superconducting strips for small-current amplitude. We present the dependence of the ac loss in radial strips upon the configuration of the strips and upon the number of strips. The results show that behavior of the ac loss of radial strips carrying bidirectional currents differs significantly from that carrying unidirectional currents.