CAPP-12TB

Abstract

Two distinct mysteries in understanding of our universe can be resolved by a hypothetical pseudo-scalar particle called axion. Since Peccei and Quinn gave birth to axion tailored to solve the strong CP problem, many models have been ruled out, yet invisible models such as KSVZ and DFSZ still survive and wait for the discovery. Provided by its extremely weak interaction with the standard model particles, axions in a particular mass range are promising candidate of dark matter, and such axions are called the axion dark matter. Pierre Sikivie suggested a novel way of detecting axion dark matter with a microwave cavity resonator in a strong magnetic field. The experiments with the Sikivie’s direct detection method are called axion haloscope, which are considered to be the most sensitive experiments for detecting axion and axion-like particles. It’s been more than twenty years since the first ever axion haloscope was operational, and only very recently axion dark matter experiments such as CAPP-12TB axion haloscope have reached its sensitivity to DFSZ axion witch certain axion mass ranges. In this thesis I will introduce methodologies and experiences of the CAPP-8TB and CAPP-12TB experiments.