MG15 - Talk detail

Back to previous page

 Participant

Institution

Session

Accepted

Yes

Order

Time

Talk

Title

Abstract

We present recent high precision performed at the University of Western Australia. This includes low temperature experiments to search for axion dark matter. We present first results and future plans for the Oscillating Resonant Group AxioN (ORGAN) experiment, a microwave cavity axion haloscope situated in Perth, Western Australia designed to probe for high mass axions motivated by several theoretical models. The first stage focuses around 26.6 GHz in order to directly test a claimed result, which suggests axions exist at the corresponding mass of 110 µeV. Later stages will move to a wider scan range of 15-50 GHz (60−210 µeV). We present the results of the path finding run, which sets a limit on gaγγ of 2.02× 10−12 1/eV at 26.531 GHz, or 110 µeV, in a span of 2.5 neV with 90% confidence. Furthermore, we outline the current design and future strategies to eventually attain the sensitivity to search for well-known axion models over the wider mass range. This includes new designs of tunable microwave cavities based on Bragg modes, with super mode tuning. We will also discuss other plans to search for low mass axions below 10-6 eV with first results setting new limits. Finally we will discuss a rotating Lorentz Invariance experiment, which sets new limits in the phonon sector.

Pdf file

Back to previous page