Development of pulsed field magnetometer with flexible structure

Abstract

Aiming at the shortcomings of the existing pulsed field magnetometer (PFM), e.g., the complex structure and high cost, a new PFM with flexible structure is proposed. The pulsed magnet is designed as a dual-coil structure. By adjusting the combined state of the switchgears in the power supply, the maximum magnetic fields of 10 T with pulse durations of 6.52 ms, 12.78 ms and 46.56 ms can be produced. The energy used for the magnetic field generation is stored on the 2.56 mF capacitor bank with the charging voltage being selectable between 0 and 3 kV. The magnetization is recorded by a 16 bit 250 kS/s data acquisition (DAQ) device. For the system control and data process, a LabVIEW program is developed. The effect of the eddy current on the conductive sample is corrected by using the finite difference method (FDM). The hysteresis of NdFeB sample is measured, and the results show that the PFM has excellent measurement performance.