# Compact bulk-machined electromagnets for quantum gas experiments

## TL;DR

This paper introduces a compact, efficient bulk-machined electromagnet design with integrated cooling, optimized for quantum gas experiments, enabling high magnetic fields in constrained spaces.

## Contribution

The paper presents a novel bulk copper electromagnet with integrated cooling and customizable machining, enhancing compactness and efficiency for quantum gas research.

## Key findings

- Produces magnetic fields suitable for $^6$Li Feshbach resonance at 832.2 G
- Offers a space-efficient and cost-effective coil design
- Demonstrates effective water cooling in a compact form

## 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.