Automatic wide-range nuclear magnetometer

A nuclear magnetic resonance magnetometer with self-oscillating detector (detected absorption signal) is described. This is self-locking magnetometer with automatic oscillator level control. By means of this magnetometer the magnetic field can be measured in the range 0.025-4T. The permissible inhomogeneity of the measured field amounts to 0.5-2.5%xcm-1 at the measurement error of 0.0 % (depending on the field value and the way of resonance tuning - automatically or by hand). In some particular cases the inhomogeneity of 5% cm-1 is permitted. Proton resonance is used throughout the whole field range. The use of Li nuclear samples increases this range up to 10 T. The probe is connected with the rest part of the device by a 10 m cable, which allows to measure the magnetic fields of large magnet pole diameters as well as far from the magnet. The basic circuit of the magnetometer is presented