# First axion dark matter search with toroidal geometry

## TL;DR

This paper reports the first axion dark matter search using a toroidal haloscope, setting new limits on axion-photon coupling in a specific mass range and discussing future prospects with larger setups.

## Contribution

It introduces the pioneering use of toroidal geometry in axion haloscope searches and provides initial experimental constraints on axion-photon coupling.

## Key findings

- Excluded axion-photon coupling down to 5×10⁻⁸ GeV⁻¹
- Covered axion mass range from 24.7 to 29.1 μeV at 95% confidence
- Discussed potential for larger-scale toroidal axion searches

## Abstract

We firstly report an axion haloscope search with toroidal geometry. In this pioneering search, we exclude the axion-photon coupling $g_{a\gamma\gamma}$ down to about $5\times10^{-8}$ GeV$^{-1}$ over the axion mass range from 24.7 to 29.1 $\mu$eV at a 95\% confidence level. The prospects for axion dark matter searches with larger scale toroidal geometry are also considered.