# Compact bulk-machined electromagnets for quantum gas experiments

### Submission summary

 As Contributors: Jean-Philippe Brantut · Hideki Konishi · Kevin Roux Arxiv Link: https://arxiv.org/abs/1901.08791v3 (pdf) Date accepted: 2019-04-11 Date submitted: 2019-03-21 Submitted by: Brantut, Jean-Philippe Submitted to: SciPost Physics Discipline: Physics Subject area: Atomic, Molecular and Optical Physics - Experiment Approach: Experimental

### 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.

### Ontology / Topics

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Published as SciPost Phys. 6, 048 (2019)

We are pleased to submit an updated version of the manuscript containing the revisions requested by the two referees.

### List of changes

- Typos have been corrected
- Mentions of a 'Helmholtz' configuration for the coils has been removed.

### Submission & Refereeing History

Resubmission 1901.08791v3 on 21 March 2019
Resubmission 1901.08791v2 on 18 March 2019
Submission 1901.08791v1 on 28 January 2019