# Antiproton beams with low energy spread for antihydrogen production

## TL;DR

This paper presents a new adiabatic transport method for low energy spread antiprotons, significantly improving antihydrogen production efficiency by reducing energy spread from 15 eV to 0.23 eV.

## Contribution

The authors developed an adiabatic transport beamline with pulse-driven coils that drastically reduces antiproton energy spread for antihydrogen synthesis.

## Key findings

- Energy spread reduced to 0.23 eV from 15 eV
- Higher antihydrogen production rate achieved
- Effective adiabatic transport demonstrated

## Abstract

A low energy antiproton transport from the ASACUSA antiproton accumulation trap (MUSASHI trap) to the antihydrogen production trap (double cusp trap) is developed. The longitudinal antiproton energy spread after the transport line is 0.23 +- 0.02 eV, compared with 15 eV with a previous method used in 2012. This reduction is achieved by an adiabatic transport beamline with several pulse-driven coaxial coils. Antihydrogen atoms are synthesized by directly injecting the antiprotons into a positron plasma, resulting in the higher production rate.