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arxiv: 2207.13597 · v1 · pith:PNJSAWXW · submitted 2022-07-27 · hep-ex · physics.ins-det

Near-Quantum-Noise Axion Dark Matter Search at CAPP around 9.5 μeV

Jinsu Kim , Ohjoon Kwon , \c{C}a\u{g}lar Kutlu , Woohyun Chung , Andrei Matlashov , Sergey Uchaikin , Arjan Ferdinand van Loo , Yasunobu Nakamura
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Seonjeong Oh HeeSu Byun Danho Ahn Yannis K. Semertzidis
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We report the results of an axion dark matter search over an axion mass range of 9.39-9.51 ${\mu}$eV. A flux-driven Josephson parametric amplifier (JPA) was added to the cryogenic receiver chain. A system noise temperature of as low as 200 mK was achieved, which is the lowest recorded noise among published axion cavity experiments with phase-insensitive JPA operation. In addition, we developed a two-stage scanning method which boosted the scan speed by 26%. As a result, a range of two-photon coupling in a plausible model for the QCD axion was excluded with an order of magnitude higher in sensitivity than existing limits.

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Cited by 3 Pith papers

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