Search for invisible axion dark matter with a multiple-cell haloscope

TL;DR

This paper reports the first search for invisible axion dark matter using a novel multiple-cell cavity haloscope, demonstrating improved sensitivity and efficiency in the high-mass region compared to traditional methods.

Contribution

Introduces a new multiple-cell cavity haloscope concept that enhances high-mass axion detection efficiency and simplifies the experimental setup.

Findings

Set new limits on axion-photon coupling between 13.0 and 13.9 μeV.

Demonstrated the effectiveness of the multiple-cell cavity design.

Showed potential for future high-mass axion searches.

Abstract

We present the first results of a search for invisible axion dark matter using a multiple-cell cavity haloscope. This cavity concept was proposed to provide a highly efficient approach to high mass regions compared to the conventional multiple-cavity design, with larger detection volume, simpler detector setup, and unique phase-matching mechanism. Searches with a double-cell cavity superseded previous reports for the axion-photon coupling over the mass range between 13.0 and 13.9$\,\mu$eV. This result not only demonstrates the novelty of the cavity concept for high-mass axion searches, but also suggests it can make considerable contributions to the next-generation experiments.