Preliminary Results of the CASCADE Hidden Sector Photon Search

TL;DR

The CASCADE experiment uses microwave technology to search for hidden sector photons, achieving preliminary exclusion limits that surpass existing constraints in a specific mass range.

Contribution

First proof-of-principle microwave-based hidden sector photon search with modular cryogenic detector at CASCADE, demonstrating improved exclusion limits.

Findings

Expected exclusion limit of 1.10 x 10^{-8} in photon mass range

Exceeds current experimental limits in the specified mass range

Demonstrates feasibility of microwave technology for hidden sector photon detection

Abstract

Light shining through a wall experiments can be used to make measurements of photon-WISP couplings. The first stage of the CASCADE experiment at the Cockcroft Institute of Accelerator Science and Technology is intended to be a proof-of-principle experiment utilising standard microwave technologies to make a modular, cryogenic HSP detector to take advantage of future high-power superconducting cavity tests. In these proceedings we will be presenting the preliminary results of the CASCADE LSW experiment showing a peak expected exclusion of $1.10 \times 10^{-8}$ in the mass range from 1.96$\mu$eV to 5.38$\mu$eV, exceeding current limits.