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.