High frequency axion search cavity using dielectric ring at IBS/CAPP

Abstract

The Center for Axion and Precision Physics Research (CAPP) of IBS in Korea is launching a microwave axion search experiment using a high Q-factor, tunable resonant cavity submerged in a strong magnetic field, which is originally proposed by P. Sikivie[1]. We are currently searching for axions in the 1.5 to 2.5 GHz (TM010 mode) frequency range, but would like to extend the search range in the future without suffering volume loss. In order to access high frequencies without much degrading the axion to photon conversion power and the scanning rate of the experiment, a new type of cavity with dielectric material (sapphire) inside is proposed. With proper geometry of the dielectric material, it is possible to create higher modes with larger form factors.