Effect of Strand Longitudinal Thermal Conduction on Take-Off Properties of Cable-in-Conduit Superconductors

TL;DR

This paper investigates how longitudinal thermal conduction in cable-in-conduit superconductors affects their quench behavior, introducing an effective heat-exchange coefficient to quantify this effect.

Contribution

It provides a theoretical and numerical analysis of the impact of copper-mediated thermal conduction on superconductor quench properties, proposing a new quantification method.

Findings

Thermal conduction influences quench behavior significantly.

An equal area criterion for thermal equilibrium is established.

An effective heat-exchange coefficient models conduction effects.

Abstract

The effect of the strand longitudinal thermal conduction carried mainly by the stabilizing copper on the take-off (quench) behaviour of cable-in-conduit supercondutors is investigated theoretically and numerically. An equal area criterion type of condition is found for the thermal equilibrium of the conductor. It is shown that the thermal conduction effect can be quantified in terms of an effective, enhanced heat-exchange coefficient.