Precision Measurements in Time-Varying Magnetic Fields

This paper describes an electron magnetic resonance magnetometer for precision measurement of pulsed magnetic fields. Special attention is given to the probe, which consists of a pair of coupled helices in order to reduce eddy-current losses in the probe. A short description of the Stanford Linear Accelerator Center´s magnet modulator is given as background, and results of the measurements are presented. Other methods of pulsed magnetic field measurements are briefly described for comparison.