John R St

Jan 16, 2024 | link.aps.org | Ben McAllister |John R St |Aaron Quiskamp |QDM Lab

Axions are a compelling dark matter candidate, and one of the primary techniques employed to search for them is the axion haloscope, in which a resonant cavity is deployed inside a strong magnetic field so that some of the surrounding axions may convert into photons via the inverse Primakoff effect and become trapped inside the resonator. Resonant cavity design is critical to the sensitivity of a haloscope, and several geometries have been utilized and proposed.

Jun 5, 2023 | link.aps.org | Catriona Thomson |Ben McAllister |John R St |Maxim Goryachev

Abstract We present new results of a room temperature resonant AC haloscope, which searches for axions via photon upconversion. Traditional haloscopes require a strong applied DC magnetic background field surrounding the haloscope cavity resonator, the resonant frequency of which is limited by available bore dimensions.