A Bitter-type electromagnet for complex atomic trapping and manipulation

TL;DR

This paper presents a novel Bitter-type electromagnet design with enhanced cooling and versatile magnetic field configurations, suitable for complex atomic trapping and manipulation.

Contribution

The authors introduce an innovative 3D-printed water manifold enabling dual-direction water flow and stacking of non-concentric coils for improved electromagnet performance.

Findings

Achieved low thermal resistance of 4.2 K/kW.

High water flow rate of 10 L/min at 190 kPa.

Enabled multiple magnetic field configurations for atomic trapping.

Abstract

We create a pair of symmetric Bitter-type electromagnet assemblies capable of producing multiple field configurations including uniform magnetic fields, spherical quadruple traps, or Ioffe-Pritchard magnetic bottles. Unlike other designs, our coil allows both radial and azimuthal cooling water flows by incorporating an innovative 3D-printed water distribution manifold. Combined with a double-coil geometry, such orthogonal flows permit stacking of non-concentric Bitter coils. We achieve a low thermal resistance of 4.2(1) K/kW and high water flow rate of 10.0(3) L/min at a pressure of 190(10) kPa.