Measurement accuracy of a pulsed field magnetometer designed for rare earth based permanent magnets

A pulsed field magnetometer with maximum field of 120 kOe has been constructed. The pulsed field generated by a 18 kJ capacitor bank system combined with a pulsed coil was oscillation damped with a period of 10.12 ms. The specimen space was designed to heat up to 200/spl deg/C by flowing hot N/sub 2/ gas. Magnetic hysteresis curve was measured by induction method during 10.12 ms of a pulsed duration from the first positive to the second positive peak. The accuracy of PFM is 2% within the space of /spl plusmn/2 mm/spl times/8 mm at the center of the J-coil.