A new concept multi-stage Zeeman decelerator: experimental implementation

TL;DR

This paper reports the successful experimental implementation of a cost-effective, multi-stage Zeeman decelerator using an innovative design with 25 hexapoles and 24 solenoids, capable of significantly reducing the kinetic energy of metastable helium atoms.

Contribution

It introduces a new multi-stage Zeeman decelerator design with improved thermal management and cost efficiency, demonstrating practical operation and energy reduction capabilities.

Findings

Achieved up to 60% kinetic energy removal for helium atoms.

Decelerator operates at up to 10 Hz repetition rate.

Design is mechanically simple and cost-effective.

Abstract

We demonstrate the successful experimental implementation of a multi-stage Zeeman decelerator utilizing the new concept described in the accompanying paper. The decelerator consists of an array of 25 hexapoles and 24 solenoids. The performance of the decelerator in acceleration, deceleration and guiding modes is characterized using beams of metastable Helium ($^3S$) atoms. Up to 60% of the kinetic energy was removed for He atoms that have an initial velocity of 520 m/s. The hexapoles consist of permanent magnets, whereas the solenoids are produced from a single hollow copper capillary through which cooling liquid is passed. The solenoid design allows for excellent thermal properties, and enables the use of readily available and cheap electronics components to pulse high currents through the solenoids. The Zeeman decelerator demonstrated here is mechanically easy to build, can be operated with cost-effective electronics, and can run at repetition rates up to 10 Hz.