Speaker
Description
The Axion Dark Matter eXperiment (ADMX) is a microwave-cavity haloscope designed to search for axion dark matter. The axion was originally proposed as a consequence of the Peccei–Quinn solution to the strong CP problem and has since emerged as a compelling dark matter candidate. Among the commonly used benchmark models for the axion–photon coupling, ADMX targets sensitivity to the more weakly coupled DFSZ model.
In ADMX, a strong magnetic field enables the conversion of dark matter axions into microwave photons near the axion Compton frequency. A tunable, high-Q microwave cavity resonantly enhances and extracts this signal. The experiment operates at ultralow temperatures to suppress thermal noise and maximize the signal-to-noise ratio, while quantum amplifiers, including Josephson parametric amplifiers (JPAs), further reduce the receiver noise toward the quantum limit.
This talk will provide an overview of the ADMX experimental technique, detector and receiver systems, and current scientific run status, with an outlook toward upcoming operations and sensitivity goals.