Cubic coil system composed of three sets of cubic triple coils to produce wide area 0.66% uniform magnetic field in any direction.

The article focuses on the design, construction, and testing of a novel cubic coil system composed of three orthogonal sets of cubic triple square coils, each set featuring two outer square coils forming a cube and a central square coil with 0.6 times the number of turns of the outer coils. This system generates a magnetic field with 0.66% uniformity (±0.33%) over a large region of approximately 2 meters in any direction, surpassing the uniform field range of conventional Helmholtz and related coil systems. The coil design offers advantages including ease of assembly, self-supporting structure, and improved accessibility to internal instruments, making it suitable for applications requiring near-zero magnetic fields, such as electron spectrometry. Experimental measurements align well with theoretical calculations, confirming the system's capability to produce a wide, somewhat uniform magnetic field, and the design can be optimized to achieve ±0.259% uniformity by adjusting current ratios without altering the coil configuration.