Normal zone propagation along superconducting films deposited on wide substrates

TL;DR

This paper provides an analytical analysis of normal zone propagation in superconducting films on wide substrates, considering effects like thermal resistance and substrate width, with applications to various film configurations.

Contribution

It introduces new analytical expressions for propagation velocity that account for substrate effects and extends to complex film geometries.

Findings

Propagation velocity depends on thermal resistance and substrate width.

Analytical formulas applicable to meander and parallel film configurations.

Results can be used for approximate analysis of multifilamentary superconductors.

Abstract

The propagation of a normal zone in a long superconducting film on a dielectric or conducting substrate is analyzed analytically. The obtained expressions for the propagation velocity allow one to analyze the effect of the thermal resistance between the film and substrate and the width of the substrate. The results are expended into the cases of the normal zone propagation in a meander and in parallel films and can be approximately applied to multifilamentary coated superconductors.