Numerical analysis and experiment of critical current of a preliminary CICC model made from quasi-isotropic strands

Abstract

The rare-earth barium copper oxide (REBCO) tape has a good development prospect in the application of large high field magnets with low temperature because of its high critical current density and excellent mechanical and electro-magnetic properties. In recent years, some superconducting conductors based on REBCO tapes have been proposed, such as cable-in-conduit conductor (CICC) designed based on TSTC and CORC. In this paper, a type of preliminary CICC model is proposed and fabricated based on the quasi-isotropic strand (Q-IS). The critical current characteristics of the model and the contact resistance of copper terminal are analysed, respectively. Firstly, the critical current of a partially-filled superconducting CICC is calculated by self-consistent model at 77K/self-field. Then, a preliminary CICC experimental sample is made and tested to measure its critical current. Finally, the critical current of a full-size superconducting CICC under different magnetic induction intensities and external magnetic field orientations at 77K and 4.2K are also calculated, respectively. The results provide another CICC candidate for the application of large high field magnet in the future.