Shining Light Through a Wall at The Any Light Particle Search II Experiment

The Any Light Particle Search II (ALPS II) is a "light-shining-through-a-wall" experiment located at DESY in Hamburg, Germany. The experiment consists of two 120 m strings of straightened 5.3 T HERA dipoles separated by an opaque wall and containing high-finesse optical cavities. Axions or axion-like particles that are generated by photons in the production optical cavity pass through the wall into the regeneration optical cavity where some will regenerate photons identical to those in the production cavity. The regenerated photons will be detected with a heterodyne readout scheme during the initial configuration after which the experiment will be reconfigured to use a transition-edge single-photon detector. In 2023, science runs started in a reduced sensitivity configuration with the regeneration cavity only commissioned. In this talk, I will report on the status of the experiment, the science data taken so far, and the outlook for 2024 and beyond.