Nb3Sn Scaling Parameterization - Part II

by Ian Pong

Tuesday 28 Sept 2021, 14:00 → 15:00 US/Pacific

Speaker: Ian Pong

 

Abstract: 

Using magnetization techniques to determine the temperature dependence of critical current in Nb3Sn wires is attractive because of their relative ease compared with variable-temperature transport measurements.  However, there is a known mismatch in the temperature scaling characterizations when using magnetization data compared to transport data.  From a practical standpoint, it is the transport properties that matter, as performance prediction, margin calculations, and other aspects of magnet designs rely on the knowledge of the amount of transport current the superconductor can carry in a magnetic field. 

In this talk, I will identify the underlying issues and propose a procedural solution for determining the temperature dependence of transport critical current in Nb3Sn superconducting wires using magnetization measurements.  With this procedure, it becomes possible to combine the simplicity and economy of quick magnetization measurements at different temperatures with accurate prediction of transport properties in extrapolated temperature ranges.