Orateur
Laurent Chevalier
Description
The DAWA (Dark Matter Axion Wideband Approach) experiment aims to detect
axion-photon conversions in the 10–40 GHz frequency range, with sensitivity
to axion-photon couplings on the order of 10⁻¹¹ [GeV⁻¹].
The experimental setup consists of a spherical metallic surface magnetized
by permanent magnets, generating an average magnetic field of
approximately 0.8 T, over an area of about 1 m² at room temperature.
The signal detection chain includes cryogenic low-noise amplifiers operating at ~4 K,
followed by a two-stage heterodyne system at room temperature that downconverts
GHz-frequency signals to the tens of MHz range.
The first tests are scheduled to begin at the end of this year,
with initial measurements expected in early 2026.
