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arXiv · 2407.18586

Near-quantum-limited axion dark matter search with the ORGAN experiment around 26 $\mu$eV

Aaron P. Quiskamp·Graeme Flower·Steven Samuels·Ben T. McAllister·Paul Altin·Eugene N. Ivanov·Maxim Goryachev·Michael E. Tobar
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Abstract

The latest result from the ORGAN experiment, an axion haloscope is presented. This iteration of the experiment operated at millikelvin temperatures using a flux-driven Josephson parametric amplifier for reduced noise, along with various other improvements over previous iterations. Covering the $25.45 - 26.27\,\mu\text{eV}$ ($6.15-6.35$ GHz) mass (frequency) range, this near-quantum limited phase of ORGAN employs a conducting rod resonator and a 7-T solenoidal magnet to place the most sensitive exclusion limits on axion-photon coupling in the range to date, with $|g_{a\gamma\gamma}| \gtrsim 2.8\times10^{-13}$ at a 95\% confidence level.

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Aaron P. Quiskamp, Graeme Flower, Steven Samuels, Ben T. McAllister, Paul Altin, Eugene N. Ivanov, Maxim Goryachev, Michael E. Tobar. 2024-07-26. Near-quantum-limited axion dark matter search with the ORGAN experiment around 26 $\mu$eV. https://doi.org/10.1103/physrevd.111.095007

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