The break of shielding current at pulsed field magnetization of superconducting annuli

TL;DR

This paper investigates the phenomenon of shielding current breakdown in superconducting annuli during pulsed field magnetization, proposing a simple model to describe flux penetration and associated heating effects.

Contribution

It introduces a simple model to qualitatively explain the shielding current break and flux penetration in superconducting annuli under pulsed magnetization.

Findings

Identification of a narrow heated sector allowing flux entry

Development of a qualitative model for the process

Observation of current breaking effects during pulsed magnetization

Abstract

The superconducting current breaking effect at pulsed field magnetization of HTS annuli was carefully investigated. It is proposed the simple model for qualitative description of this process. In particular, it is shown the appearance of a narrow sector of the considerable heating through which the magnetic flux penetrates into the superconducting annuli.