PCB Coil Design Producing a Uniform Confined Magnetic Field

TL;DR

This paper introduces a PCB-based coil design that achieves highly uniform magnetic fields over a large volume, suitable for precise atomic magnetometry applications.

Contribution

The paper presents a novel PCB coil design that enables customizable wire paths and achieves sub-milligauss uniformity in magnetic fields.

Findings

Field uniformity better than 10^{-3} over large volume

Effective magnetic field control in 1 to 10 μT range

Suitable for atomic magnetometry-based current control

Abstract

We present a magnetic field confining coil with a sub-$10^{-3}$ field uniformity over a large fraction of the coil. The structure is entirely made out of printed circuit boards (PCBs). The PCB design allows to tailor the path of wires to fit the required geometry. We measure the field uniformity with cesium magnetometers in a field range from 1 to 10 $\mu\mathrm{T}$. Our application uses such a coil for an atomic magnetometry-based current controller.