Stability and normal zone propagation speed in YBCO coated conductors with increased interfacial resistance

TL;DR

This paper investigates how interfacial resistance impacts the stability and normal zone propagation speed in YBCO-coated conductors, revealing that higher resistance increases propagation speed but reduces stability, suggesting potential for optimized quench protection.

Contribution

It introduces a numerical simulation study showing the effects of interfacial resistance on stability and propagation speed in YBCO conductors, proposing optimization strategies.

Findings

Increased interfacial resistance raises normal zone propagation speed.

Higher resistance decreases stability margins.

Optimization can improve quench protection balance.

Abstract

We will discuss how stability and speed of normal zone propagation in YBCO-coated conductors is affected by interfacial resistance between the superconducting film and the stabilizer. Our numerical simulation has shown that the increased interfacial resistance substantially increases speed of normal zone propagation and decreases the stability margins. Optimization of the value of the resistance may lead to a better compromise between stability and quench protection requirements than what is found in currently manufactured coated conductors.