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

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arxiv 2210.07215 v2 pith:3QEB623K submitted 2022-10-13 hep-ex hep-phphysics.ins-det

classification hep-exhep-phphysics.ins-det
keywords textaxionsdmradio-50ldmradio-mconsistsfieldgammalc-oscillator
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Recent theoretical advancements have made the QCD axion a stronger dark matter candidate, especially in the sub-$\mu\text{eV}$ range. While cavity haloscopes have made significant progress in excluding QCD axions in the $1 - 100\ \mu\text{eV}$ region, the $1 \text{ peV} - 1\ \mu\text{eV}$ 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 $g_{a\gamma\gamma} <5\times10^{-15}\text{ GeV}^{-1}$ between 5 kHz and 5 MHz. DMRadio-m$^3$ 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$^3$.

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Cited by 1 Pith paper

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  1. SQUID Readout of a High-$Q$ Superconducting $LC$ Resonator

    physics.ins-det 2026-07 conditional novelty 6.0 of 10

    A 250 kHz superconducting LC resonator with Q≈2×10⁶ was read out with a dc SQUID, whose damping and back-action noise were characterized versus flux bias.

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