Mechanical properties of HTS Magnet for a 5MJ SMES using coated conductor on round core

Conductor on round core (CORC) cable which was prepared by stacking in parallel High Temperature Superconductor (HTS) tapes with helical layout on a flexible round former. Based on configuration of CORC cable, this paper presents a HTS Magnet for a 5 MJ class Superconducting Magnetic Energy Storage (SMES) magnet. Mechanical properties due to the stress by Lorentz force must be evaluated for the stable operation of the magnet in large magnets. This paper mainly analyses the hoop strain of the magnet caused by Lorentz force. According to the analysis results, a method to strengthen structures of CORC cable was put forward after it was simulated by finite element method (FEM).