[6p-S42-1~18] 11.3 Critical Current, Superconducting Power Applications

[6p-S42-18] Parameter estimation of flux-creep flow model using differential evolution of E-J characteristics in various superconductors

〇Edmund Soji Otabe¹, Tomohiro Yonenaka¹, Masaru Kiuchi¹, Ryohei Funaki² (1.Kyushu Inst. of Tech., 2.Kyushu Univ.)

Keywords:superconductor, differential evolution, electric field-current density characteristic

It is well known that the flux creep-flow model can explain the electric field-current density characteristics in high temperature superconductors. It is necessary to estimate several pinning parameters in the flux creep-flow model. In this study, Differential Evolution (DE) is used for estimation of the pinning parameters. In the process of parameter estimation, the suitable number of generation is not clear and seems to depend on the number of data of electric field-current density characteristics. In the present work, we apply DE for several kinds of high temperature superconductors and try to find out the condition for short time and high accuracy estimation of the pinning parameters. As a result, it turned out that there was an appropriate number of data.