Ponente
Descripción
The Canfranc Axion Detection Experiment (CADEx) will search for the axion in the yet unexplored mass range of 330-460 micro-electronvolts (µeV). Operating in the W-band (75-100 GHz), CADEx will be installed in a dilution cryostat at the Canfranc Underground Laboratory (LSC), combining, for the first time, a cavity haloscope in a strong magnetic field with a camera made with Kinetic Inductance Detectors (KIDs). This novel combination is designed to detect the polarization signature of the axion.
Achieving the necessary sensitivity requires advancements in two key areas: enhancing the performance of the cavities in the haloscope at very short wavelengths (3 mm) and reaching the ultimate sensitivity of the KID-based detection system in the W-band. In this work, we present the initial results concerning the bandwidth and sensitivity obtained from a 3-by-3 pixel prototype camera, with each pixel being a KID fabricated from a superconducting Ti/Al bilayer. The characterization of this device was performed at 10 mK. We have measured a Noise Equivalent Power (NEP) of order 10^{-19} W·Hz^{-0.5}, providing promising indications of the camera's capability, and marking an essential step towards realizing the full potential of CADEx's search for distinct signals of the dark photon or axions in the W-band.
