Some rate dependent aspects of flux jumping in wires of type II superconductors

摘要

Time varying currents have been applied to wire samples of Nb25%Zr, Nb33%Zr, and Nb. Flux jumping effects were observed by monitoring the flux motion voltage Vf developed along a given length, ???, of sample. The currents Ij at which flux jumps occurerd were studied as a function of the rate ??j, at which the current was changing at the time a given jump took place. ??'s in the range 101