NUMERICAL SIMULATION OF PULSED FIELD MAGNETIZATION OF CRYOCOOLER-COOLED BULK SUPERCONDUCTOR

For application of RE-Ba-Cu-O bulk superconductors as a strong magnet, magnetization is a very important technique to be studied. In particular, pulsed field magnetization (PFM) is considered a useful method for magnetizing bulk superconductor. There are more experimental studies of PFM in many research groups. Numerical analysis is also important to perform such research subjects more effectively and clarify the physical phenomena. A commercial software COMSOL was used for studying the pulsed field magnetization of cryocooler-cooled bulk superconductor. This software is based on the finite element method and can take into account nonlinear superconducting properties, and temperature dependence of thermal conductivity, specific heat and electric conductivity of the used materials. In the FEM analysis four kinds of axisymmetric models were used. The obtained results coincide qualitatively with the experimental results reported so far.