Pristrains and Irreversible Strands of Multifilamentary Nb₃Sn Conductos

Abstract

To study characteristics of stress distribution in the conductor is necessary for the design of a superconducting magnet working stably at high magnetic fields. Strain effects of conductors depend on the layer thickness of Nb₃Sn filaments and the structure of the conductor. The dependence of reversible strain and pre-strain effects on the layer thickness were investigated using superconductor fabricated by liquidus-solidus process that could vary the layer thickness of Nb₃Sn in the wide range. The reversible strain limit decreased with increasing Nb₃Sn layer thickness. It was found that the pre-strain of the conductors depended on how Nb₃Sn filaments were grouped and distributed in the stabilizer like Cu.