Screening current induced field and its relaxation characteristics of CICC consisting of quasi-isotropic strands

Abstract

With its high critical current density and excellent mechanical properties, second generation high temperature superconducting tapes (2G HTS) are attractive as high current conductors in power transmission and high magnetic field applications. Due to the high width to thickness ratio of the conductor, the screening current and screening current induced field (SCIF) caused by the alternating magnetic field during stacking cannot be ignored, and the instability of the central magnetic field due to the relaxation of the SCIF is also one of the problems studied in this paper. Therefore, the study of SCIF is important for superconducting magnets and power transmission applications. In this paper, the SCIF in quasi-isotropic stranded Cable-in-conduit conductor (QIS-CICC) is investigated by simulation. The effect of the amplitude and direction of the alternating magnetic field on the SCIF, is obtained by applying the alternating magnetic field to the different directions of the QIS-CICC. The simulation results are also compared with Twisted Stacked tape cable based CICC (TSTC-CICC), which are necessary for the design of the next generation of superconducting magnets.