The pinning parameters such as strength of pinning force, temperature dependence of pinning force and so on using in flux creep-flow model to explain electric field vs current density (E-J) characteristics were determined by Differential Evolution (DE). DE is one of the methods in Evolutionary Computation (EC) to find an optimization of a problem. First, a model data of E-J characteristics in which the pinning parameters were given was prepared, and it was confirmed that DE can find the given pinning parameters from the model data. Then, DE and mesh method were used to determine the pinning parameters in experimental E-J characteristics of GdBa2CuO7-δ high temperature superconductor. In mesh method, the all combinations of pinning parameters with constant interval for each parameter are calculated, and best set of pinning parameters is selected. It was found that DE shows better performance than mesh method in terms of calculation time and accuracy for determining pinning parameters.
|ジャーナル||Journal of Physics: Conference Series|
|出版物ステータス||出版済み - 7 26 2017|
|イベント||29th International Symposium on Superconductivity, ISS 2016 - Tokyo, 日本|
継続期間: 12 13 2016 → 12 15 2016
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)