  We describe the construction of a simple, compact, and cost-effective
feedback system that produces flat-top field profiles in pulsed magnetic
fields. This system is designed for use in conjunction with a typical
capacitor-bank driven pulsed magnet, and was tested using a 60-T pulsed magnet.
With the developed feedback controller, we have demonstrated flat-top magnetic
fields as high as 60.64 T with an excellent field stability of +-0.005 T. The
result indicates that the flat-top pulsed magnetic field produced features high
field stability and an accessible field strength. These features make this
system useful for improving the resolution of data with signal averaging.
