Kinetic Inductance Detectors for the CADEx Experiment: Searching for Axions in the W-Band

This paper presents the detector developments for the Canfrac Axion Detection Experiment (CADEx), aiming at detecting dark matter axions and dark photons within the W-band. A proof of concept of the detection system is based on an array of lumped-element kinetic inductance detectors (LEKIDs). Micros...

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Veröffentlicht in:Journal of low temperature physics 2024-11, Vol.217 (3-4), p.522-527
Hauptverfasser: Rodriguez, David, de Ory, Marina C., Aja, Beatriz, de la Fuente, Luisa, Gallego, Juan Daniel, Villa, Enrique, Pascual, Juan Pablo, Artal, Eduardo, Granados, Daniel, Martin-Pintado, Jesus, Gomez, Alicia
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container_end_page 527
container_issue 3-4
container_start_page 522
container_title Journal of low temperature physics
container_volume 217
creator Rodriguez, David
de Ory, Marina C.
Aja, Beatriz
de la Fuente, Luisa
Gallego, Juan Daniel
Villa, Enrique
Pascual, Juan Pablo
Artal, Eduardo
Granados, Daniel
Martin-Pintado, Jesus
Gomez, Alicia
description This paper presents the detector developments for the Canfrac Axion Detection Experiment (CADEx), aiming at detecting dark matter axions and dark photons within the W-band. A proof of concept of the detection system is based on an array of lumped-element kinetic inductance detectors (LEKIDs). Microstrip technology is used as read-out scheme, and the ground plane acts as backshort for optimizing optical absorption in the W-band. A titanium/aluminum bilayer is used for ensuring detection below 100 GHz. The detector array design includes an inner active section consisting of 36 detectors for direct detection of the axion signal and an additional outer rim of 28 blind pixels for calibration purposes. The nanofabrication process and a preliminary cryogenic characterization are presented, being the results in good agreement with the frequency design. Measured devices exhibit coupling quality factors of the order of 6 × 10 4 , internal quality factors above 10 5 and an estimated kinetic inductance of 3.3 pH/□.
doi_str_mv 10.1007/s10909-024-03198-8
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subjects Arrays
Bilayers
Characterization and Evaluation of Materials
Condensed Matter Physics
Dark matter
Design factors
Detectors
Ground plane
Hypothetical particles
Inductance
Magnetic Materials
Magnetism
Nanofabrication
Physics
Physics and Astronomy
Q factors
Sensors
title Kinetic Inductance Detectors for the CADEx Experiment: Searching for Axions in the W-Band
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