The study of relaxation characteristics of stack of HTS tapes for use in levitation systems and trapped flux magnets

Abstract

We present experimental data and analysis of application of coated conductors (CC) for levitation and trapped field magnets. The magnetization loops and magnetization relaxation curves were obtained in fields up to 14 T and temperatures from 4.2 K to 77.4 K. The levitation force and its relaxation were measured for the stack of superconducting tapes at T=77 K. The measurements of levitation force for different stack sizes demonstrate the linear growth of the force amplitude and the improvement of the relaxation characteristics as a number of tapes in a stack increases.