The DALI Haloscope: A Magnetized Phased Array Coupled to a Semi-Open Fabry--Pérot Resonator

@misc{miguel2026dali,
  title = {{The DALI Haloscope: A Magnetized Phased Array Coupled to a Semi-Open Fabry--Pérot Resonator}},
  author = {Javier De Miguel and Antonios Gardikiotis and Eduardo David González-Carretero and Elvio Hernández-Suárez and Roger J. Hoyland and Enrique Joven and Abaz Kryemadhi and Marios Maroudas and Chiko Otani and J. Alberto Rubiño-Martín and Yannis K. Semertzidis and Michael E. Tobar and Konstantin Zioutas},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.12776},
  eprint = {2609.12776},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.12776},
}

TY  - UNPB
TI  - The DALI Haloscope: A Magnetized Phased Array Coupled to a Semi-Open Fabry--Pérot Resonator
AU  - Javier De Miguel
AU  - Antonios Gardikiotis
AU  - Eduardo David González-Carretero
AU  - Elvio Hernández-Suárez
AU  - Roger J. Hoyland
AU  - Enrique Joven
AU  - Abaz Kryemadhi
AU  - Marios Maroudas
AU  - Chiko Otani
AU  - J. Alberto Rubiño-Martín
AU  - Yannis K. Semertzidis
AU  - Michael E. Tobar
AU  - Konstantin Zioutas
PY  - 2026
DA  - 2026/09/11
PB  - arXiv
DO  - 10.48550/arxiv.2609.12776
UR  - https://arxiv.org/abs/2609.12776
AB  - DALI is an axion haloscope consisting of a magnetized phased array backed by a conducting mirror and coupled in the near field to a semi-open Fabry--Pérot resonator. The applied static magnetic field makes both the dielectric interfaces and the conducting mirror sensitive to axion-induced electromagnetic conversion. Each interface acts as a radiating surface, and the resulting fields are projected onto the mode collected by the resonator and delivered to the receiver. We derive the detected power in terms of the power available from the magnetized mirror, the coherent contribution of the dielectric interfaces, the transverse mode overlap, the loaded quality factor, and the receiver-coupling coefficient. This formulation separates two distinct enhancement mechanisms. The dielectric-interface emissions may add coherently, producing a dielectric boost, while the semi-open Fabry--Pérot resonator provides enhancement through resonant storage of the coupled electromagnetic field. These contributions depend differently on the dielectric thicknesses, spacings, and resonant mode, and should therefore be evaluated independently. The same assembly can operate between the limits of a coherently boosted dielectric haloscope and a mirror-sourced, resonantly enhanced Fabry--Pérot haloscope. This combined architecture offers a flexible approach to resonant axion searches at frequencies for which conventional closed microwave cavities become increasingly limited in conversion volume.
ER  -