Compact bulk-machined electromagnets for quantum gas experiments

Abstract

We present an electromagnet combining a large number of windings in a constrained volume with efficient cooling. It is based on bulk copper where a small pitch spiral is cut out and impregnated with epoxy, forming an ensemble which is then machined at will to maximize the use of the available volume. Water cooling is achieved in parallel by direct contact between coolant and the copper windings. A pair of such coils produces magnetic fields suitable for exploiting the broad Feshbach resonance of ${}^6$Li at 832.2 G. It offers a compact and cost-effective solution for quantum gas experiments.

Submission to SciPost

References in corpus (6)

• Feshbach Resonances in Ultracold Gases
• Precise characterization of ^6Li Feshbach resonances using trap-sideband resolved RF spectroscopy of weakly bound molecules
• Two-terminal transport measurements with cold atoms
• Zeeman slowers made simple with permanent magnets in a Halbach configuration
• Efficient Continuous-Duty Bitter-Type Electromagnets for Cold Atom Experiments
• All-optical production of ${}^6\text{Li}$ molecular BEC in excited hyperfine levels

Cited by in corpus (4)

• Cavity-assisted preparation and detection of a unitary Fermi gas
• A digital PID controller for stabilizing large electric currents to the ppm level for Feshbach resonance studies
• Stochastic dynamics of a few sodium atoms in a cold potassium cloud
• A Bitter-type electromagnet for complex atomic trapping and manipulation