A haloscope of the QUAX–aγ experiment composed of an oxygen-free high thermal conductivity-Cu cavity inside an 8.1 T magnet and cooled to ∼200 mK is put in operation for the search of galactic axion with mass ma≃43 μeV. The power emitted by the resonant cavity is amplified with a Josephson parametric amplifier whose noise fluctuations are at the standard quantum limit. With the data collected in about 1 h at the cavity frequency νc=10.40176GHz, the experiment reaches the sensitivity necessary for the detection of galactic QCD-axion, setting the 90% confidence level limit to the axion-photon coupling gaγγ<0.766×10−13 GeV−1.
Search for invisible axion dark matter of mass m(a)=43 mu eV with the QUAX-a gamma experiment
Falferi, P.;Lombardi, A.;
2021-01-01
Abstract
A haloscope of the QUAX–aγ experiment composed of an oxygen-free high thermal conductivity-Cu cavity inside an 8.1 T magnet and cooled to ∼200 mK is put in operation for the search of galactic axion with mass ma≃43 μeV. The power emitted by the resonant cavity is amplified with a Josephson parametric amplifier whose noise fluctuations are at the standard quantum limit. With the data collected in about 1 h at the cavity frequency νc=10.40176GHz, the experiment reaches the sensitivity necessary for the detection of galactic QCD-axion, setting the 90% confidence level limit to the axion-photon coupling gaγγ<0.766×10−13 GeV−1.File in questo prodotto:
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