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Search for Dark Matter Axions with CAST-CAPP
- Source :
- Nature Commun. 13, 6180 (2022)
- Publication Year :
- 2022
-
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 $g_{a{\gamma}{\gamma}} = 8 \times {10^{-14}}$ $GeV^{-1}$ at the 90% confidence level. The here implemented phase-matching technique also allows for future large-scale upgrades.<br />Comment: 24 pages, 5 figures, Published version available with Open Access at https://www.nature.com/articles/s41467-022-33913-6
- Subjects :
- High Energy Physics - Experiment
Physics - Instrumentation and Detectors
Subjects
Details
- Database :
- arXiv
- Journal :
- Nature Commun. 13, 6180 (2022)
- Publication Type :
- Report
- Accession number :
- edsarx.2211.02902
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1038/s41467-022-33913-6