Jul 22 – 27, 2018
US/Eastern timezone

First Results from the ADMX-G2 Axion Search

Jul 26, 2018, 11:50 AM
117 (MacMillian)



Brown University Providence, Rhode Island, USA
Talk Direct Detection 4.2 Plenary


Andrew Sonnenschein (Fermi National Accelerator Laboratory)


We report on results from the first run of the ADMX-G2 experiment, a haloscope search for dark matter axions. The search excludes the range of axion-photon couplings predicted by the DFSZ model for masses between 2.66 and 2.81 μeV. This unprecedented sensitivity is achieved by operating a large-volume haloscope at sub-kelvin temperatures, thereby reducing thermal noise as well as the excess noise from the ultra-low-noise SQUID amplifier used for the signal power readout. Future runs will extend sensitivity over a wide range of axion masses.

Primary author

Andrew Sonnenschein (Fermi National Accelerator Laboratory)

Presentation materials