Magnetic Field Uniformity around Near-Helmholtz Coil Configurations

Abstract

The magnitude of the total magnetic field in the vicinity of a single round coil pair, a single square coil pair, and a trio of mutually orthogonal round coil pairs has been computer calculated, and the results graphically displayed as a series of contour lines. An investigation of the uniformity of field as a function of coil spacing indicates a distinct optimum near the Helmholtz spacing.