RADES (Relic Axion Detector Exploratory Setup) is a project with the goal of directly searching for axion dark matter above the 30μeV scale employing custom-made microwave filters in magnetic dipole fields. Currently RADES is taking data at the LHC dipole of the CAST experiment. In the long term, the RADES cavities are envisioned to take data in the (baby)-IAXO magnet. In this article we report on the modelling, building and characterisation of an optimised microwave-filter design with alternating irises that exploits maximal coupling to axions while being scalable in length without suffering from mode-mixing. We develop the mathematical formalism and theoretical study which justifies the performance of the chosen design. We also point towards the applicability of this formalism to optimise the MADMAX dielectric haloscopes.
@article{arxiv.2002.07639,
title = {Scalable haloscopes for axion dark matter detection in the 30$\mu$eV range with RADES},
author = {A. Álvarez Melcón and S. Arguedas Cuendis and C. Cogollos and A. Díaz-Morcillo and B. Döbrich and J. D. Gallego and J. M. García Barceló and B. Gimeno and J. Golm and I. G. Irastorza and A. J. Lozano-Guerrero and C. Malbrunot and A. Millar and P. Navarro and C. Peña Garay and J. Redondo and W. Wuensch},
journal= {arXiv preprint arXiv:2002.07639},
year = {2020}
}
Comments
27 pages, 16 figures, v3: expanded sensitivity discussion, version accepted for publication in JHEP