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This paper presents a study of the thermal transport properties of MgB$_2$tapes differing in architecture, stabilization and constituent materials. Thetemperature and field dependence of thermal conductivity, $\kappa(T,B)$, wasinvestigated both along the conductor and in the direction perpendicular to thetape. These data provide fundamental input parameters to describe the 3D heatdiffusion process in a winding. Thermal transport properties - even in field -are typically deduced using semi-empirical formulas based on the residualresistivity ratio of the stabilizer measured in absence of magnetic field. Theaccuracy of these procedures was evaluated comparing the calculated $\kappa$values with the measured ones. Based on the experimental thermal conductionproperties $\kappa(T,B)$ and critical current surface $J_C(T,B)$ we determinedthe dependence of minimum quench energy and normal zone propagation velocity onthe operating parameters of the conductor. The correlation between thermalproperties and tape layout allowed us to provide information on how to optimizethe thermal stability of MgB$_2$ conductors.

Thermal conductivity and stability of commercial MgB$_2$ conductors