Building a Large-Scale Educational Cloud Chamber to Observe Radiation with the Naked Eye

We’ve developed a large-scale educational cloud chamber (20×15×10 cm) that visually reveals natural radiation in real-time. Using four double-stage Peltier cells, the system cools the alcohol-air mixture down to -35 °C, creating the conditions needed to observe particle tracks with the naked eye. One of the largest of its kind worldwide. We built it to display in the Young Exhibition at Lariofiere, Italy, where it will be used to teach students about radiation and particle physics.