Development of repetitive pulsed high magnetic field with high repetition rate

A novel system for generating a repetitive pulsed high magnetic field (RPHMF) with a high repetition rate has been developed at the Wuhan National High Magnetic Field Center. This system consists of multiple capacitor bank modules and a monolithic coil magnet. All the capacitor bank modules are connected in parallel. The RPHMF is achieved by discharging the energy from the capacitor banks to the magnet with a time interval between every two capacitor bank modules. The repetition rate of the magnetic field pulses is controlled by adjusting the time interval. The amplitude and the polarity of the pulses are adjusted by changing the charging voltage of the capacitors and the polarity changing switches. Magnetic fields with a frequency of about 60 Hz and a peak value of about 20 T have been achieved, as well as the magnetic field pulses with increasing or declining peak values. With the diversity of the repeated magnetic field waveforms, the measurement of magnetization of the dispersible SmCo₅ nanoparticle permanent magnet has been successfully carried out.