Taiwan axion search experiment with haloscope: Designs and operations

Abstract

We report on a holoscope axion search experiment near 19.6 µeV from the Taiwan Axion Search Experiment with Haloscope collaboration. This experiment is carried out via a frequency-tunable cavity detector with a volume V = 0.234 liter in a magnetic field B₀ = 8 T. With a signal receiver that has a system noise temperature T_sys ≅ 2.2 K and an experiment time of about one month, the search excludes values of the axion-photon coupling constant g_aγγ ≳ 8.1 × 10^-14 GeV^-1, a factor of 11 above the Kim-Shifman-Vainshtein-Zakharov benchmark model, at the 95% confidence level in the mass range of 19.4687-19.8436 µeV. We present the experimental setup and procedures to accomplish this search.