A Josephson Parametric Amplifier (JPA) for the ADMX-HF Experiment

M. Malnou, Daniel Palken, Gene C Hilton +2 more

Mustafa Bal, Junling Long, Ruichen Zhao +12 more

G. Carosi

E. P. Menzel, A. Baust, Frank Deppe +9 more

Jinmyeong Kim, Boris I. Ivanov, Çağlar Kutlu +9 more

The axion is a hypothetical particle, a promising candidate for dark matter, and a solution to the strong CP problem.Axion haloscope search experiments deal with a signal power comparable to noise uncertainty at millikelvin temperature.We use a flux-driven Josephson parametric amplifier (JPA) with the aim of approaching a noise level near the theoretically allowed limit of half quanta.In our measurements to characterize the JPA we have found the added noise to the system with a JPA as the first-stage amplifier to be lower than 110 mK at the frequencies from 0.938 GHz to 0.963 GHz.

Sergey V. Uchaikin, Jinmyeong Kim, Çağlar Kutlu +8 more

This paper provides a comprehensive overview of the development of flux-driven Josephson Parametric Amplifiers (JPAs) as Quantum Noise Limited Amplifier for axion search experiments conducted at the Center for Axion and Precision Physics Research (CAPP) of the Institute for Basic Science. It focuses on the characterization, and optimization of JPAs, which are crucial for achieving the highest sensitivity in axion particle detection. We discuss various characterization techniques, methods for improving bandwidth, and the attainment of ultra-low noise temperatures. JPAs have emerged as indispensable tools in CAPP’s axion search endeavors, playing a significant role in advancing our understanding of fundamental physics and unraveling the mysteries of the Universe.