Create a Helmholtz Field with our Pulse4Life Devices
Creating a Helmholtz field
A Helmholtz coil is a parallel pair of identical circular coils spaced one radius apart and wound so that the current flows through both coils in the same direction. This winding results in a uniform magnetic field between the coils with the primary component parallel to the axes of the two coils.
An electron beam travels counterclockwise in a circle in the magnetic field produced by the Helmholtz coils, as shown. Assuming that the earth’s field in downward, one can conclude that the Helmholtz field equals the earth’s field.