Search for Dark Matter Axions with CAST-CAPP

Abstract

The CAST-CAPP axion haloscope, operating at CERN inside the CAST dipole magnet, has searched for axions in the 19.74 $\mu$eV to 22.47 $\mu$eV mass range. The detection concept follows the Sikivie haloscope principle, where Dark Matter axions convert into photons within a resonator immersed in a magnetic field. The CAST-CAPP resonator is an array of four individual rectangular cavities inserted in a strong dipole magnet, phase-matched to maximize the detection sensitivity. Here we report on the data acquired for 4124 h from 2019 to 2021. Each cavity is equipped with a fast frequency tuning mechanism of 10 MHz/min between 4.774 GHz and 5.434 GHz. In the present work, we exclude axion-photon couplings for virialized galactic axions down to $g_{a\gamma \gamma }=8\times 10^{-14}$ $Ge{V}^{-1}$ at the 90% confidence level. The here implemented phase-matching technique also allows for future large-scale upgrades.

24 pages, 5 figures, Published version available with Open Access at https://www.nature.com/articles/s41467-022-33913-6

References in corpus (4)

• The Local Dark Matter Density
• Piezoelectrically Tuned Multimode Cavity Search for Axion Dark Matter
• The HAYSTAC Axion Search Analysis Procedure
• Phase-matching of multiple-cavity detectors for dark matter axion search

Cited by in corpus (9)

• Constraints on axion-like particles with the Perseus Galaxy Cluster with MAGIC
• A Simple Derivation of the Gertsenshtein Effect
• Solar radio emissions and ultralight dark matter
• A Light QCD Axion with Hilltop Misalignment
• Stripped-Envelope Supernovae for QCD Axion Detection
• Time domain non-linear quantum interferometry
• Cavity, lumped-circuit, and spin-based detection of axion dark matter: differences and similarities
• Extended Haloscope Search and Exclusion of a Candidate Signal near 1.036 GHz
• ADAMOS: Axion Daily Modulation Searches for Dark Matter at 20 GHz