Efficient water-cooled Bitter-type electromagnet for Zeeman slowing in cold-atom experiments

We describe the design, construction, and characterization of a Bitter-type electromagnet that produces a spatially-dependent magnetic field used for Zeeman slowing in cold-atom experiments. The coil consists of stacked copper arcs separated by PTFE spacers of varying thicknesses, generating a near-optimal field profile using a single power supply. With an electrical resistance of 26.5(3) mΩ and self-inductance of 19.1(1) μH, our design achieves a fast electrical switching time of τ ≈ 100 μs in