A Rogowski–Chattock coil for local magnetic field measurements: sources of error

A magnetic field can be measured on a space scale of a few millimeters by means of magnetic sensors, such as a Rogowski–Chattock coil. The main advantage of the Rogowski coil is its capability to measure the field strength directly at the sample surface because both ends of the coil can be installed very close to the specimen surface. However, the measurements are affected by numerous errors, which are comprehensively discussed in this note. (technical design note)