Status of DMRadio-50L and DMRadio-m$^3$

Abstract

Recent theoretical advancements have made the QCD axion a stronger dark matter candidate, especially in the sub-\muμeV range. While cavity haloscopes have made significant progress in excluding QCD axions in the 1-100 \muμ eV region, the 1 peV- 1 \muμeV region remains unexplored. The DMRadio program consists of a series of experiments designed to probe low mass axions. DMRadio-50L uses a 1 T average field toroidal magnet and a high-Q LC-oscillator with target sensitivity to axions of g_{a\gamma\gamma} < 5 \times 10^{-15}\text{ GeV}^{-1}gaγγ<5×10−15 GeV−1between 5 kHz and 5 MHz. DMRadio-m^33 consists of a higher frequency LC-oscillator in a 4 T peak field solenoidal magnet with sensitivity to the DFSZ model of QCD axions between 30 MHz and 200 MHz. In this work, we present the status of DMRadio-50L and DMRadio-m^3.3.