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 =10.40176 GHz, 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 m𝑎=43 𝜇eV with the QUAX–𝑎𝛾 experiment
Crescini, N.;Falferi, P.;
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 =10.40176 GHz, 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
