Periodic cusped magnetic fields generated by air-core electromagnets

The periodic cusped magnetic fields generated by a kind of air-core electromagnets made of thin metal sheets have been investigated analytically and numerically. The amplitude of the PCM fields can be increased through increasing the PCM period, decreasing the magnet gap, or increasing the linear current density in the metal sheets. In addition, the increase of the PCM period will lead to better uniformity of peak-to-peak magnetic fields on the axis z.