ABSTRACT
Low-frequency search coil magnetometers are widely used for geophysical prospecting, space research, magnetic anomaly detection. Search coils are passive magnetic sensors converting magnetic field into voltage. The aim of the optimization is to find the maximum possible resolution as a function of the outer diameter of the tube core and the diameter of the wire for a given search coil size and the type of preamplifier. The search coil structure and dimensions and the equivalent electric circuit of the magnetometer. A novel approach allows integrating all the magnetometer components, including the search coil, its electronics, and batteries within a single housing that is not larger than what is needed just for the search coil. Reducing the size and weight of sensors and electronics is very important for many applications. Experiments with a prototype have confirmed the theoretical evaluation of the magnetometer accuracy, frequency response, and noise.
