Design and Test of a 60 T/100 ms Flat-Top Pulsed Magnet with a Large Bore at the WHMFC

The flat-top pulsed magnetic field (FTPMF) can meet the requirements of many fundamental scientific researches on higher magnetic field, longer flat-top duration, and higher stability. In this paper, a magnet is designed and manufactured to generate a 60 T/100 ms FTPMF at the Wuhan National High Magnetic Field Center (WHMFC). To meet the requirements of the spectroscopy measurements under FTPMF, it has a large inner bore diameter of 38 mm. Due to the limitation of the number of capacitor modules at the WHMFC, a co-optimization strategy for power supply and magnet systems is proposed. It simultaneously optimizes both the magnet structure and the parameters of the power supply system. It reduces the number of capacitor modules required to generate a 60 T/100 ms FTPMF with a flatness of 1% to 28 units. The experimental results show that a FTPMF with a magnetic field of 60.53 T, a duration of 58.9 ms, and a flatness of 1% is obtained using nineteen capacitor modules.