### Microwave Hidden Sector Photons at UWA.

Rhys G. Povey, John G. Hartnett & Michael E. Tobar
In these proceedings we present the latest progress on our microwave cavity light shining through a wall hidden sector photon experiment, as well as introduce a new method of hidden sector photon detection. Our new experiment uses a high Q superconducting Niobium emitter cavity and moderate Q room temperature copper detector cavity separated by ample shielding. The projected sensitivity of our setup to the kinetic mixing factor is $\chi \sim 1.8 \times 10^{-8}$ at a...