No magnetic moment solenoid

The non-magnetic moment solenoid is composed of two sets of solenoids nested in a nested manner, and through a certain number of coil turns of each group of coils and a certain current direction, the magnetic field outside the solenoid is rapidly attenuated. The total magnetic moment of the tube coil is zero. Its main features and advantages are: it will not produce magnetic interference to the environment outside a certain distance, and will not magnetize the magnetic material near to it; it is particularly prominent in the use of magnetic shielding cylinder, it can magnetic shield layer and coil magnetic field. The mutual influence is reduced to negligible levels.