Air Lenses Underwater

February 9, 2025

The picture shows the bubbles of air that formed on the detector each make a lens that views several of the photosensor modules inside the detector.

This photo is from one of eight underwater cameras built at the University of Winnipeg and installed on the CERN Water Cherenkov Test Experiment.  The photo is from the first week with water in the experiment when an air leak into the detector was being fixed. The larger bubbles of air that formed on the detector each make a lens that views several of the photosensor modules inside the detector.