Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

Ultra-Low Noise Axion Dark Matter Search Using a Josephson Parametric Amplifier at CAPP

Jul 8, 2022, 7:05 PM
1h 25m
Bologna, Italy

Bologna, Italy

Palazzo della Cultura e dei Congressi
Poster Dark Matter Poster Session


Mr Jinsu Kim (IBS/CAPP)


Axions, hypothetical particles associated with the spontaneous breaking of a postulated U(1) symmetry, offer a dynamic solution to the strong CP problem, an important puzzle in the standard model (SM). Axions in the mass range of 1 μeV - 10 meV are considered as favored candidates for dark matter. They have extremely weak interactions with the SM fields, making relevant searches exceptionally difficult. To date, the cavity haloscope has remained the most sensitive approach in this mass range. Relying on the two-photon coupling, it utilizes a frequency-tunable microwave cavity immersed in a strong magnetic field. The Center for Axion and Precision Physics Research recently implemented a flux-driven Josephson parametric amplifier in the receiver chain of an axion haloscope, reducing the system's noise down to 200 mK. We present the results of the axion dark matter search for the mass range of 9.39 - 9.51 μeV. We also discuss a newly developed scanning method that can improve the scan speed by approximately 30%.

In-person participation Yes

Primary author

Mr Jinsu Kim (IBS/CAPP)

Presentation materials