Jul 16 – 26, 2022
US/Pacific timezone

BREAD: Broadband Reflector Experiment for Axion Detection

Jul 18, 2022, 7:00 PM
2h 20m
211 South Ballroom (HUB)

211 South Ballroom



Stefan Knirck (Fermi National Accelerator Laboratory)


We present a novel dish antenna for broadband ~$\mu$eV-eV range axion and wave-dark matter detection, which allows to utilize state-of-the-art high-field solenoidal magnets. At these masses it is difficult to scale up traditional resonator setups to the required volume. However, at metallic surfaces in a high magnetic field dark matter axions can convert to photons regardless of axion mass. These photons can be successively focused onto a detector (dish antenna concept). We present progress on BREAD, a dish antenna proposal with a $\sim 10\,{\rm m}^2$ conversion area and a novel rotationally symmetric parabolic focusing reflector designed to take advantage of high-field solenoidal magnets. We recently demonstrated [PRL 128 (2022) 131801] that this concept has the potential to discover QCD axions of several decades in mass range. Besides the experimental concept this poster shows our progress towards first stage hidden photon and axion pilot experiments for two distinct frequency ranges - GigaBREAD and InfraBREAD - with expected sensitivities to unexplored coupling strengths. We detail R&D on reflector characterization, horn antenna & sensor testing and signal readout. We also outline sensitivity estimates for future large-scale versions.

In-person or Virtual? In-person

Primary author

Stefan Knirck (Fermi National Accelerator Laboratory)

Presentation materials