Helmholtz Coil

A pair of identical loop coils placed parallel to each other and separated by a distance equal to their radius, designed to create a highly uniform magnetic field in the space between them. This uniform coverage is useful when consistent field strength across a target area matters more than peak intensity at a single point. Unlike a butterfly loop coil where the two loops angle inward to focus the field, a Helmholtz pair keeps the loops parallel so the fields overlap evenly.