The Effect on the Superconducting Properties of the Addition of Oxygen and Titanium to (Nb‐1Zr)3Sn Mono Element Internal Tin (MEIT) Conductors

Abstract

MEIT conductors fabricated with Nb‐1at%Zr filaments are evaluated as to the effect of the additions of Oxygen and Titanium introduced through the tin core. The effects as a function of time and temperature are evaluated through reaction area and grain size. Current density in the reaction layer is evaluated as a function of magnetic field and the reaction variables. In the temperature range of 850 °C to 900°C the addition of oxygen yielded the best results with layer current density of 1877 A/mm2 at 12 T. Fabrication experience with Nb‐1at%ZrOx filaments and solutions are also discussed.