Static magnetic field amplification in high-T _c superconducting flux transformer equipped with multi-turn coil prepared using REBCO tape conductor

Abstract

In this study, a high critical temperature (high-T c) superconducting flux transformer is prepared using a commercially available REBa2Cu3Oy (REBCO) high-T c superconducting (HTS) tape conductor. The device configuration includes a 10 cm diameter pickup coil and a 3 cm diameter multi-turn input coil which are formed by the ‘cut-and wind’ method. The static magnetic field transfer efficiency between both coils has been estimated using inductance calculation of the multi-turn coils. The transfer efficiency measured is close to the calculation, and the field amplification of the transferred magnetic field compared to the applied field to the pickup coil is confirmed in the device which equipped with the multi-turn input coil. The magnitude of this magnetic field amplification has achieved to 125% of the applied field. This result suggests that the HTS flux transformer proposed in this study is effective in the sensitivity enhancement of the magnetometer for static magnetic fields.