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Description
Single-turn coil (STC) is a mainstream destructive pulsed magnet used to generate ultra-high magnetic field beyond 100 T. During the discharge process, STC is in extreme physical states with extremely high pressure and high strain rate deformation, leading to fracture and explosion of the coil. This study investigates the damage and destruction process of STC using three-dimensional finite element analysis. Simulation results shows that the damage always starts near the inner surface of STC due to high electromagnetic force and great tension pressure. By comparison, the simulation results are consistent with the measured experimental data. Based on the principle that the peak magnetic field needs to be generated before the coil explosion, this study provides theoretical guidance for the design of STC systems.
