[23p-E203-1~12] 11.3 Critical Current, Superconducting Power Applications

△ [23p-E203-11] Expansion of Electric Field Measurement Range of RE-123 Superconducting Tape by Initial Decay Measurements of the Magnetic Moment Using a Hall Probe

〇Zeyu Wu¹, Kohei Higashikawa¹, Takanobu Kiss¹ (1.Kyushu Univ.)

Keywords:E-J characteristic

We have shown in a previous study that the E-J characteristics of RE-123 wires can be evaluated by measuring the relaxation of magnetization. However, the electric field range that can be measured by the conventional magnetization measurement becomes less than 10^-8 V/m, which is several orders of magnitude lower than that by the four-probe method. In this study, taking advantage of the properties of the Hall probe with high-speed response, we measured the properties of the initial magnetization decay of less than 0.1 s and succeeded in extending the measuring range of the electric field to 10^-5 V/m equivalent to that of the four-probe method.