20th Patras Workshop on Axions, WIMPs and WISPs

Session

Monday

22 Sept 2025, 08:30

96. Registration

22/09/2025, 08:30

97. Welcome

22/09/2025, 09:00

50. ADAMOS: Axion Daily Modulation Searches for Dark Matter at 20 GHz

Antonios Gardikiotis

We present ADAMOS, a new microwave haloscope experiment under development at the University of Hamburg, aimed at searching for dark matter axions in the 20 GHz frequency range. The experiment centers on a novel “thin-shell” annular cavity resonator designed to maintain a large detection volume at high frequencies—an approach that addresses longstanding challenges in haloscope scaling. A...

17. Stupendously Large Primordial Black Holes from the QCD axion

The inflationary diffusion of (pseudo-)scalar fields with discrete symmetries can seed the formation of a gas of closed domain walls after inflation, when the distance between degenerate minima in field space is not too far from the inflationary Hubble scale. Primordial black holes (PBHs) can then be formed once sufficiently heavy domain walls re-enter the Hubble sphere. In this scenario,...

59. Towards ultra-low backgrounds for high-efficiency transition edge sensors in optical and infrared axion searches

Dr Manuel Meyer (University of Southern Denmark)

Cryogenic transition edge sensors (TESs) are single photon detectors featuring high quantum efficiency and excellent energy resolution below 10% at optical and near-infrared wavelengths. If thermal backgrounds can be suppressed to sufficiently low levels, such detectors would be ideally suited for experiments searching for photon-axion conversion at these wavelengths such as...