Effects of Current Distribution on the Stability of a Triplet NbTi/Cu Superconductor

摘要

A triplet NbTi/Cu superconductor high current density superconducting strands for a Cable-In-Conduit Conductor (CICC), has been used to study the influence of the current distribution within the triplet on its stability. The initial current distribution among superconducting strands was controlled in terms of a resistive heater wound on the outset of each strand. The Minimum Quench Energies (MQE) have been measured with different initial current distributions within the triplet. We experimentally confirmed that MQE changed with the difference of initial current distribution among the strands. This reason is discussed from the viewpoint of the difference between transport current of heated strand and its minimum propagating current.