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First search for axion dark matter with a Madmax prototype
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abstract
This paper presents the first search for dark matter axions with mass in the ranges 76.56 to 76.82 $\mu$eV and 79.31 to 79.53 $\mu$eV using a prototype setup for the MAgnetized Disk and Mirror Axion eXperiment (MADMAX). The experimental setup employs a dielectric haloscope consisting of three sapphire disks and a mirror to resonantly enhance the axion-induced microwave signal within the magnetic dipole field provided by the 1.6 T Morpurgo magnet at CERN. Over 14.5 days of data collection, no axion signal was detected. A 95% CL upper limit on the axion-photon coupling strength down to $|g_{a\gamma}| \sim 2 \times 10^{-11} \mathrm{GeV}^{-1}$ is set in the targeted mass ranges, surpassing previous constraints, assuming a local axion dark matter density $\rho_{a}$ of $0.3~\mathrm{GeV}/\mathrm{cm}^3$. This study marks the first axion dark matter search using a dielectric haloscope.
Forward citations
Cited by 7 Pith papers
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Dark Matter Haloscope with a Disordered Dielectric Absorber
A disordered dielectric powder can act as a broadband dark-matter-to-photon conversion target, and the proposed DPHaSE experiment could probe QCD axions and dark photons in the 10 meV to 1 eV range.
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Axiverse Lampposts
In a hierarchical multi-axion theory with random couplings, axion field ranges shrink with 1/sqrt(N), generic axion–SM couplings are suppressed, but the QCD axion's coupling is unsuppressed.
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String Theory and Grand Unification Suggest a Sub-Microelectronvolt QCD Axion
String-theoretic axions consistent with grand unification and proton decay are predicted to have masses in the 3e-11 to 1e-8 eV window, with at most 47 axions in the Kreuzer-Skarke ensemble.
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Search for post-inflationary QCD axions with a quantum-limited tunable microwave receiver
A 38 MHz scan near 10.2 GHz with the QUAX haloscope found no axion signal, setting 90% confidence limits on the axion-photon coupling at the 10^-14 GeV^-1 level.
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Comment on the preprint: First Limits on Axion Dark Matter from a DALI Prototype arXiv:2603.21951
Idealized COMSOL modeling of the reported DALI plate stack yields only resonances with negligible axion form factors, so the claimed ALP sensitivity cannot be reproduced.
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First searches for axion and dark photon dark matter with MADMAX
MADMAX prototypes produced the first dielectric-haloscope axion and dark photon dark matter searches near 77 to 84 micro-eV, beating earlier limits in narrow windows.
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Experiments to test the hypothesis for solar and dark matter axions
This is a pedagogical review of haloscope and helioscope experiments searching for dark matter and solar axions, with an overview of near-future technological developments.
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