Magnetic shielding analysis of axisymmetric HTS plate by flux flow creep model

The magnetic shielding performance of the high-Tc superconducting (HTS) plate is numerically investigated by assuming the flux flow creep model as a constitutive relation representing a mixed state. In order to reduce the number of variables, both the axisymmetry of the plate shape and the isotropy of the applied magnetic field are introduced. Under these assumptions, the shielding factor and the damping coefficient are calculated as functions of time and the frequency of the applied magnetic field. The results of computations show that an increase in the frequency will weaken the time dependence of the shielding factor and will enhance the shielding performance. In addition, the magnetic shielding performance in the low-frequency range and in the high-frequency range is shown to be strongly influenced by the flux creep and the flux flow, respectively. (author)